Abstract:The development of high performance impregnated diamond bits is a key tool to the development of drilling industry, which is especially important to improve the drilling efficiency and reduce the drilling cost in deep and complex formation. This paper reviews the new theories and technologies in designing and manufacturing impregnated diamond bits, and discusses the matrix, structure and manufacturing process in details. The study of the regulation of the diamond holding force by the matrix, such as the two major directions of strengthening matrix and weakening matrix, and the design mechanism of the matrix self-lubricating drill bit were introduced in detail for the design of the drill bit carcass. Next, new ideas in the design of the structure of the impregnated diamond bit were discussed, mainly concerning the design of the lip structure and the waterway system. Meanwhile, typical impregnated diamond bit design techniques were discussed, and the existing problems in the manufacturing process of pregnant diamond bits were discussed, and the application of 3D printing for the manufacture of complex structure pregnant diamond drill bits was considered to be promising in the future. It is important to keep abreast of the latest advances in the design and manufacturing technology and theory of pregnant diamond bits in order to accelerate the research and development of high performance impregnated diamond bits.

Abstract:This article introduces the advantages of ordered diamond tools compared to traditional tools， as well as the current status of the development of ordered diamond tools at home and abroad. By introducing the application of ordered arranged diamond tools in engineering and geological oil and gas exploration， the design methods for ordered arranged diamond are reveals， including vacuum method， adhesive method， vacuum adsorption multi-station method， and wrapping ball method. It has certain reference significance for the design and manufacture of diamond drill bits for deep solid mineral and oil and gas exploration in China.

Abstract:High-speed rotary drilling with diamond-impregnated bit is one of the main methods of deep hard rock core drilling. Although it is widely used in various fields， it still has some problems， such as unstable drilling performance and abnormal bit wear. The reason is that the understanding of the law of bit/rock interface and dynamic wear process is still not clear. In this paper， the current research status of mechanical response models of diamond-impregnated bits for rock breaking is reviewed， and the relationship between the bit wear mechanism and the rock breaking mode and drilling speed under different drilling parameters is summarized. The wear failure mechanism of diamond-impregnated bits can be summarized as the cycle process of two-body wear and three-body wear at the bit/rock interface. This paper introduces the research of the critical drilling procedure in the interval beyond the conventional speed. The exploration of the new procedure is of great significance to the development of the high speed drilling of diamond-impregnated bit.

Abstract:Obtaining in-situ natural gas hydrate reservoir cores through drilling and coring， and conducting pressure transfer and testing to obtain parameters of core physical， chemical， and mechanical properties， is one of the key technical methods for conducting marine natural gas hydrate exploration work. This paper summarizes the relevant data of natural gas hydrate core pressure retaining transfer system at home and abroad， and makes a comprehensive summary from the aspects of working principle， structural characteristics and test application， systematically reviews the research and development status of natural gas hydrate pressure retaining transfer and test system， and compares the typical core pressure retaining transfer and test system at home and abroad from the aspects of compatibility and key parameters. Some suggestions for the research and development of pressure retaining transfer system of natural gas hydrate in China are put forward

Abstract:The downhole power rotary pneumatic DTH hammer drilling technology has broad application prospects in improving the force situation of the drill pipe string under the condition of gas drilling and improving the efficiency of directional drilling. Two types of downhole power rotary pneumatic DTH hammers exist namely the pneumatic DTH hammer with self-rotation bit and the pneumatic DTH hammer driven by screw motor. This paper introduces their development status， working principles， technical characteristics， experimental applications， and analyzes the shortcomings of current research in hope to provide reference for further technical research.

Abstract:Non-contact face seal has a stable operation and no direct friction between the faces， which can greatly extend the seal life and has a wide application prospect as a shaft seal for various rotary machinery. Non-contact face seals are designed with a configuration on the face to produce a hydrodynamic pressure effect to improve the load carrying capacity of the seal. This paper describes the influence of groove shapes， face deformation， temperature-stick effect and cavitation effect on the hydrodynamic pressure effect of face seals， summarizes the current research status on the theory， experiment and application of hydodynamic pressure effect， and prospects the future development direction of non-contact face seals.

Abstract:Hot dry rock resource is a kind of renewable clean energy with huge reserves. Abundant hot dry rock resource reserves exist in China， efficient and stable exploitation of hot dry rock is one of the important ways to achieve the strategic goal of “double carbon”. The development of hot dry rock is mainly accomplished through enhanced geothermal systems. When developed， the hot dry rock is exposed to water environment with high temperature and high pressure for a long time. In this process， different minerals in the rock will dissolve/deposit， causing problems such as crack blockage or pipe scaling. At the same time， in the process of contact heat transfer between water and hot dry rock， the water-rock interaction also has an impact on the mechanical properties of rock， inducing the formation of micro-pores and the expansion of cracks， aggravating the damage degree of rock and decreasing the mechanical properties of rock. In this paper， the problems caused by water-rock interaction under high temperature and high pressure conditions in the development of hot dry rock are analyzed， the current experimental methods and numerical simulation methods of water-rock interaction are summarized， and the mechanism of water-rock interaction is described. Finally， the research direction of water-rock interaction in the development of hot dry rock in the future is discussed， which provides some theoretical reference for the long periodical， efficient and safe development of hot dry rock in the future.

Abstract:As a kind of clean energy with large reserves， hot dry rock geothermal is gradually affecting the world energy pattern under the increasingly severe environmental protection situation， and has become the focus of academia， government and enterprises. The development of granite-type hot dry rock requires the establishment of Enhanced Geothermal Systems （EGS） and the core of EGS is to drill into and fracture the reservoir to form a certain scale of fracture network， and construct a circulation circuit of injection wells and production wells to extract thermal energy for power generation. From the EGS fracturing engineering cases of granite-type hot dry rock such as Basel EGS project in Switzerland and Pohang EGS project in South Korea， it can be found that the induced earthquake has become a key factor restricting the development of granite-type hot dry rock because the specific location of large-size and high-inclination structural plane is not clear， and the flow direction of fracturing fluid in the fracturing process cannot be predicted， which leads to the slip of structural plane caused by fracturing fluid entering such structural plane and inducing earthquake. This article will focus on this problem by identifying the information of the reservoir where the hot dry rock is located and furthermore introduce the construction method of seismic control and fracturing to build artificial heat reservoir for the development of granite-type hot dry rock .

Abstract:In the new round of strategic mining operations， in order to better complete large amounts of drilling work， reduce drilling fluid leakage and drilling costs， the research and application of the expansion plugging materials should be carried out. Therefore， the synthesis methods of water absorption expansion， oil absorption expansion， and shape memory deformation plugging materials are reviewed in this article. The plugging technology using expansion plugging materials is adopted in order to meet the needs of drilling plugging such as improve the strength， salt resistance， and delay expansion. It can provide guidance for propagation of the expansion plugging materials.

Abstract:The energy generated during the sampling process of a sonic vibration rig plays a crucial role in determining the stability， efficiency， and longevity of the drilling system. In this paper， the advance of sonic vibration drilling rig sampling technology at home and abroad is reviewed， the current status of research on the dynamics modelling methods of sonic vibration sampling systems and the parameters affecting the energy transfer law of the systems is described， and future research trends are foreseen. It is judged that the influence of vibration， structural， and stratigraphic parameters should be emphasized. Reasonable optimization of parameters and improvement of structure should be made to improve sampling performance and energy transfer efficiency.

Abstract:Sonic drilling rig is widely used in the field of environmental investigation because it does not use drilling fluid and has no pollution to the formation. The drilling efficiency can be greatly improved if the double eccentric shafts of the sonic drilling rig are synchronized at high speed. This thesis systematically analyzes the synchronization mechanism of double eccentric shafts of sonic drilling rig from the common structure and principle of flow and load synchronization， as well as its synchronization accuracy， advantages and disadvantages， and puts forward the synchronization idea at high speed， so as to provide reference for its perfection and promotion.

Abstract:The exploitation and utilization of Antarctic resources is one of the important issues in the sustainable development of energy in the world. In polar drilling equipment research， sealing technology is the key technology to determine whether drilling equipment can operate safely， efficiently and economically. In this context， this paper systematically analysis the existing seal problems of polar drilling equipment. According to the new development of sealing materials and sealing technology， taking into account the seal structure， mechanical properties of materials and polar low-temperature drilling conditions， it points out the common failure forms of polar drilling equipment seal and summarizes the existing improvement schemes. The types and technical characteristics of existing polar equipment at home and abroad are systematically summarized， and the existing technical gap between home and abroad is analyzed.

Abstract:In order to meet the needs of the Antarctic scientific drilling， to obtain the base rock sample under the deep ice in the Antarctica， it is necessary to improve the ability of the Antarctic drill rigs to resist the chills from the aspects of mild insulation. In order to cope with the low temperature challenges faced by naked parts during the transportation process and during the work process， the choice of low-temperature materials for the drill drive shaft， sealing material， and drilling fluid needs to be used. The drill rig body should be in an overall insulation and heating environment with a certain insulation carrier and insulation materials during the working process. This article reviews and preferred the temperature-resistant materials and thermal insulation methods of Antarctic drilling machine. It is believed that the system insulation solution and evaluation system of low-temperature geological rig should be designed as soon as possible. Small molecular esters such as ethyl ester and propionate are potential drilling fluids of Antarctic inland drilling. They use the insulation container as the main heating method as the main heating method as the preservation and heating form. It is of certain significance to ensure that it is normal and stable to maintain normal and stable work under the harsh conditions in the Antarctic inland.

Abstract:Polar geological drilling is an important means to obtain ice cores and study the evolution of Earth’s climate. When drilling into complex formations such as brittle ice， warm ice， or ice-rock interlayer， hole wall instability frequently occurs， especially the hydraulic fracturing of ice holes， resulting in drilling fluid loss and drilling accidents. Aiming at the initiation and propagation of ice hole fractures， an ice hole fracture model is established based on Peridynamics（PD）to achieve a unified description of the continuous and discontinuous spaces around ice holes， avoid the singularity of the classical continuum mechanical differential equation at the crack tip， analyze the dynamic propagation process of cracks， and explore the influence mechanism of hydraulic pressure and fracture toughness. The case study shows that hydraulic pressure promotes fracture initiation and propagation， and the hydraulic pressure increases from 4.0MPa to 6.0MPa and 8.0MPa， the number of fracture initiation and branches increases significantly， and the fracture volume ratio increases from 4.88% to 9.61% and 12.54%. Fracture toughness hinders fracture propagation， and the fracture volume ratio decreases from 13.72% to 12.13% and 9.61% when fracture toughness increases from to and . The results of hydraulic fracturing analysis of ice holes based on PD show that the drilling fluid density and liquid column height should be adjusted in time to control the hydraulic pressure in the hole to ensure safety and efficiency when drilling into the formation with the prominent ductile-brittle transition.

Abstract:Cores from bedrock beneath the Antarctic ice sheet are important for studying the history of Antarctic glacier formation and global climate change. When drilling the inclined interface between ice and rock， it is very easy for hole inclination to occur， affecting the quality and even the success of bedrock coring. This paper analyses the force state of the drill bit during the drilling process at the ice and rock interface， and investigates the effects of factors such as formation inclination， drilling pressure， rotational speed， mechanical drilling speed and cutting work per unit volume on the force on the drill bit and hole inclination law. Finally， a vertical rock entry device was designed based on the principle of full-hole anti-slanting for the ice and rock interface.

Abstract:Microbially induced calcium carbonate deposition （MICP） technology provides a useful reference for the geological drilling industry to solve the problem of borehole wall instability in fractured formations. Exploring the growth pattern of microorganisms under the environmental conditions of drilling fluids is the primary prerequisite for the successful application of MICP technology to solve borehole wall instability in fractured formations. Therefore， in this study， we examined the growth of Bacillus sp. in XC drilling fluid at pH 7.0， 7.4， 7.8， 8.2， 8.6， 9.0， 9.4， 9.8， and 10.0， analyzed and fitted its growth pattern， and constructed its growth prediction model. The results showed that Bacillus sp. could grow normally under the experimentally set pH conditions. A comprehensive comparison of regression coefficient， mean square error， red pool information criterion， accuracy factor and bias factor of the models showed that the modified Gompertz model was more suitable to describe the growth of Bacillus sp. in XC drilling fluid， and the Arrhenius model was more suitable to describe the influence law of pH on the maximum specific growth rate of Bacillus sp. in XC drilling fluid. The results of the study lay a good theoretical foundation and provide a scientific basis for the successful application of using MICP technology to stabilize the borehole wall of fractured formations.

Abstract:The addition of anti-agglomerants （AAs） is a promising solution for mitigating gas hydrate risks in deep water hydrocarbon flowlines and drilling operations. AAs have the ability to adsorb onto small hydrate particles， promoting their dispersion and preventing agglomeration. However， the exact influence of AAs on hydrate nucleation and growth during this process remains unclear. Here， we investigated various types and concentrations of AAs to elucidate their effect on the formation kinetics of CH₄ hydrate. We measured the induction time， amount of hydrate formation， and average rate of hydrate growth in these systems. The results demonstrate that AAs can enhance hydrate formation in pure water （100%） and high water cut （95%） systems. Conversely， in systems with relatively low water cut （20% and 60%）， AAs impede or even completely inhibit hydrate nucleation and growth under our experimental conditions. This inhibition is likely attributed to the mass transfer barrier associated with AAs. By shedding light on the kinetic inhibition mechanism of AAs on hydrate agglomeration， this study contributes to the safe implementation of multiphase flow transportation and deep water oil and gas exploration， and holds significance for these endeavors.

Abstract:Hydraulic fracturing to exploit hot dry rock resources is the preferred method at present，based on its application status and characteristics， this paper analyzes the technical problems and many uncertain factors in the application of hydraulic fracturing technology to development of hot dry rock resources. The combined development scheme of horizontal docking for injection well with fracturing and horizontal docking scheme of injection-production wells are put forward， the technical feasibility of the two schemes is analyzed.

Abstract:Microscopic pore structure is of great significance to the exploration and utilization of shale oil and gas reservoirs. Taking the deep shale samples of Songke No.2 well as the research object， the mechanical properties and pore changes of shale under the action of heat and liquid were studied. The microscopic pore characteristics of saturated and heated shale were compared by means of field emission scanning electron microscopy （SEM）， high pressure mercury injection and CT scanning. The results show that the main pore types of the shale samples include micro-cracks， intergranular pores， intragranular pores， etc.， among which more micro-nano cracks are produced， and the main size range is 20nm-400nm. The saturated humidity and high temperature heating will reduce the pore volume， porosity and permeability of shale， and the higher the temperature， the more obvious the effect. The nano-scale pore shrinkage of saturated samples decreases， the proportion of 1μm-35μm increases， the proportion of pores larger than 35μm decreases， and the internal macro-fractures are filled with water-absorbing expansive minerals. The nano-scale pores of the heated sample crack to both sides， and the 40nm-100nm pores are converted into hundreds of nanometers or even micron-scale pores. The proportion of 1μm-50μm pores increases， and the internal wide cracks are filled to form small round-hole cracks. At the same time， the three-dimensional pore model of the shale samples obtained by CT scanning is reconstructed by computer software to provide a clearer and more realistic three-dimensional display and quantitative study on the surface and internal micro-pores of shale was carried out.

Abstract:This paper employs deep learning algorithms based on actual wellbore trajectory parameter data and well logging data collected from the Weiyuan block in Sichuan. An algorithmic framework capable of real-time predicting encountered strata during drilling is established. Firstly， this framework utilizes a time-series prediction algorithm to forecast the subsequent wellbore trajectory. Subsequently， based on this prediction， it achieves the forecast of strata gamma values. Finally， the identification of encountered strata types is accomplished by utilizing the predicted strata gamma values. To enhance the predictive accuracy of the entire algorithmic framework， various algorithms are employed and compared at each stage. The results demonstrate that real-time prediction using recurrent neural networks， gamma value regression prediction through random forests， and strata classification prediction using support vector machines yield the best training outcomes. The predictive accuracies reach 0.81， 0.83 and 81.8%， respectively. The real-time anticipation of encountered strata during the geologically guided process provides on-site data support and auxiliary judgment means. This contributes to the more reliable and effective achievement of geological objectives in practical engineering.

Abstract:In order to explore the influence of the liquid column pressure on the stability of borehole， study the stress characteristics and crack propagation mode of the surrounding rock under the action of the liquid column pressure in the borehole and the ground stress， the triaxial confining pressure hydraulic test method is adopted to carry out the laboratory test on the packsand by changing the confining pressure and the water pressure in the borehole， and the inner observation of the packsand is carried out by CT scanning method. The results show that：（1）when the confining pressure is constant， the variation trend of deviatorial-strain curve of packsand at each stage is greatly affected by bore water pressure， and the peak strength， residual strength and axial peak strain are positively correlated with confining pressure and bore water pressure. The action of water pressure in the pore delays the process of mechanical failure in the compressive yield stage of packsand and increases the degree of ductile fracture of packsand.（2）CT scan shows that under certain confining pressure， the angle between the principal shear fracture plane and the axial direction of the packsand decreases with the increase of the water pressure in the pore， and the shear crack track gradually deflects from the outside of the rock sample to the central pore wall. With the increase of water pressure in the hole， the collapse mode of rock block in the hole wall changes from centralized collapse to scattered collapse. The larger the water pressure in the hole， the smaller the collapse area and collapse degree of the rock in the hole wall.（3）Increasing water pressure can improve the stability of borehole and reduce the possibility of borehole instability.

Abstract:Vibratory rock fragmentation has the characteristics of low energy consumption and low required axial pressure. In order to improve the efficiency of rock fragmentation while controlling costs， a study was conducted on the rock fragmentation mode combining vibration and pressure. This article takes red sandstone as the research object and conducts research on the crack propagation law inside the rock when spherical teeth invade red sandstone under dynamic and static composite loading. The results indicate that the degree of rock fragmentation under the spherical tooth increases with the increase of dynamic and static loads， and only when the combined load peak reaches 100kN， will the rock undergo significant volumetric fragmentation. In the early stage of rock breaking， when the load is small， the rock tends to develop lateral cracks， and the rock damage becomes “wide and shallow”. As the load increases， the rock tends to develop deep cracks in the middle， followed by lateral cracks， which exhibit a "narrow and deep" characteristic. The various indicators of rock fragmentation are affected by different load parameters to varying degrees： that is， under the same amplitude increment conditions， the degree of fragmentation caused by increasing the dynamic load amplitude is greater than that caused by increasing the same static load. The above conclusions can provide important support for improving the efficiency of dynamic and static load composite crushing of hard rock and overcoming the technical difficulties of hard rock drilling.

Abstract:Problems about rock cutting are often encountered in the fields of oil drilling and tunnel excavation. The research of rock cutting problems has become an important breakthrough to improve the efficiency of mechanical mining. Aiming at the scientific problem of plastic-brittle fracture mechanism of rock cut by conical teeth during drilling， the numerical simulation of parallel rock cut by conical teeth was established through experimental testing of rock mechanics parameters and discrete element method （PFC2D） to study the cutting morphology， cutting force and rock break specific energy of rock cut at different cutting depths during rock cutting. The results show that： （1） the macro-shear crack is first generated in the cuttings to form semi-shedding cuttings， and then the tensioning failure occurs in the weak area to cause the cuttings to pop out， and the small size cuttings are generated when the cutting depth is shallow， and the large size cuttings are generated when the cutting depth is deep. （2） The peak cutting force that generates rock chips at different cutting depths was studied and found to be better in agreement with Nishimatsu’s peak force model， showing a linear increase trend with cutting depth. （3） The peak value of cutting force corresponds to the surge of cracks， and the number of steps in the crack chart will decrease with the increase of cutting depth. The specific energy of rock breaking is positively correlated with the cutting depth in a certain range， and the cutting process can be divided into plastic ductile stage， fragmentation stage and brittle failure stage according to the relationship diagram of and .

Abstract:In response to the drilling challenges such as poor wear resistance and corrosion resistance of aluminum alloy drill pipes and the difficulty of drilling in hard strata， the effects of basalt fibers on the properties of 7075 aluminum alloy drill pipe materials and WC-based diamond composites were investigated in this paper. The aluminum matrix composites and matrix were prepared by powder metallurgy and hot-pressing sintering， and their properties were tested. The results showed that the mechanical properties and corrosion resistance of basalt fiber/7075 aluminum matrix composites were improved compared with 7075 aluminum alloy. The basalt fibers reduces the wear ratio of the matrix， improves the density and thermal conductivity of the matrix， and increases the force of the matrix holding the diamond. This paper also summarizes and outlooks the research on the application of basalt fibers in the field of casing and oil pipe. The research on the application of basalt fiber in the field of casing and tubing is also summarized and prospected in this paper.

Abstract:With the increase of mining output of shallow and middle oil and gas resources， oil and gas resources exploitation gradually extends to deep and ultra deep layers. With the increase of depth， for conventional screw motors， it is impossible to solve the problem of high temperature failure of rubber bushings of its components. Therefore， designing an all metal screw motor is of great significance. This article selects the 7LZ178 all metal screw motor and analyzes its impact on the performance output of the motor from two aspects： the linear design of the stator and rotor end faces of the screw motor and the clearance ratio of the stator and rotor of the all metal screw motor. This article starts with the end face shape of the screw motor and compares and analyzes the formation principles of four types of shape， as well as the advantages and disadvantages of the four types of shape. A three-dimensional model was established using a common internal swing type stator and rotor line shape for fluid simulation. The changes in output parameters such as pressure and torque of the screw motor with changes in stator and rotor clearances were briefly analyzed. Exploring the pressure drop variation trend of metal screw motors under different clearance values provides reference significance for determining the optimal range of clearance fit of screw motors under corresponding design parameters.

Abstract:Polycrystalline diamond compact （PDC） has been widely used in geological exploration and oil drilling industries due to its significant advantages such as high hardness， high elastic modulus， high thermal conductivity， isotropy and good wear resistance. In recent years， with the increasing exploitation of deep and ultra-deep wells， PDC has been applied to the drive shaft of screw drills. In this paper， the PDC thrust bearing on the drive shaft of screw drill is taken as the research object. From the perspective of statics and the manufacture process of PDC bearing， the finite element analysis of SolidWorks Simulation software is used to explore the failure modes of PDC thrust bearing under different static pressure， temperature， torque and weld width. The variance analysis of the simulation results shows that temperature， torque and weld width have significant effects on the failure of PDC thrust bearing. Among them， temperature has a high significant effect on the deformation of PDC thrust bearing in three directions. Torque has a significant effect on the deformation of bearing in x and y directions. Weld width has a significant effect on the deformation of bearing in x and z directions.

Abstract:The third phase of the Chang ''e project has realized the exploration and sampling of the moon. In order to further explore the feasibility of the deep moon， the orthogonal test is designed based on the optimization of drill bit and drilling procedures in deep drilling.The effects of bit type and drilling schedule parameters on drilling efficiency and power consumption are analyzed. The results showed that the PDC bit outperformed other types of bits with the rate of penetration（ROP） of up to 3.98mm/s and a moderate drilling power consumption. The changes in drilling efficiency and power consumption caused by drilling procedures are studied from the angle of influence degree of test factors， coring effect and cutting-removal ability， and the relationship among rotational speed， weight on bit and pump volume and drilling rate and power is obtained by combining theoretical model. Based on the test results， the optimal bit type and drilling schedule combination are preliminarily selected to provide technical support for subsequent drilling tests.

Abstract:The moon has always been the main object of human space exploration. Lunar drilling is the most intuitive method for obtaining lunar geological information and one of the main means for human exploration of the moon. This article introduces the current technological status of lunar drilling both domestically and internationally， summarizes the main technical challenges of lunar drilling， and develops a lunar drilling simulation test bench and experimental drilling pipes based on this. The process parameters and suitable drilling pipes suitable for lunar drilling were summarized by conducting drilling experiments targeting different parameters such as pitch， drilling pressure， rotational speed， and impact frequency. Finally， the article considers the development of future lunar drilling technology based on simulation test results， in order to provide useful reference for related research.

Abstract:The exploration of major engineering construction in the west is faced with harsh environmental conditions such as “steep terrain， steep structure and fragile ecology”. The geological information that cannot be implemented and collected by vertical drilling is incomplete. Horizontal directional drilling and comprehensive testing technology are key technologies to solve the exploration problems of large and deep buried tunnels in major projects. However， there are difficulties in controlling the variable trajectories of steeply dipping formations， insufficient power for drilling machines in high cold and hypoxic formations， and high ecological and environmental requirements in ultra long horizontal rope coring drilling. This article introduces the development of a series of horizontal directional coring drilling equipment， a multi-parameter all-round wireless logging system， and horizontal rope drilling trajectory control technology and equipment， which have been successfully applied in the Sichuan Tibet Railway and the Water Diversion Project from Daduhe to Minjiang river， Play a demonstration and promotion role in the western plateau area.

Abstract:Long distance horizontal directional drilling technology is applied to geotechnical engineering investigation. By using its advantages of traversing construction and trenchless， it can effectively make up for the shortcomings of vertical drilling method， and because of its good guiding performance， the investigation accuracy is high. Combined with the geotechnical exploration project of the water delivery tunnel of Yangtze-replenish-Han Project， this paper sorted out the use of drilling rig， measurement equipment while drilling， drilling tools， etc.， and proposed the construction technology method of “core drilling+directional drilling” alternating in the drilling implementation process， and finally introduced the construction difficulties and countermeasures in the actual construction process.

Abstract:In the drilling of kilometer level wire line coring horizontal holes， the research and demonstration of directional deviation correction and logging technology for horizontal holes are carried out. The technology of full hole wire line coring deviation correction for deep horizontal directional drilling was innovated and formed， and the precise control of the drilling track was realized. Using hydraulic transmission of geophysical testing equipment and drilling television equipment inside the drill pipe has effectively solved the three major problems of difficulty in delivering， testing， and proposing ultra-long horizontal boreholes， forming a comprehensive logging technology system for small caliber and ultra-long horizontal boreholes. The drilling task of 925m deep horizontal directional drilling hole was successfully completed， accurately entering the geological target area and realizing the exploration purpose.

Abstract:Leakage drilling and cement plugging are often used when geological drilling encounters completely leak formation. It is suggested that the dry hole section measures can be taken for leakage drilling such as long running water at hole opening， pouring high consistency grout， pouring foam slurry and applying grease on drill pipe. While for the cementing plugging， adding anti-dispersant， hardening accelerating and flash setting agent， retarding agent and cement ball cemedin can be used. The drill hole plugging ball is developed， and the structural characteristics， operation process and principle are explained and discussed， which is intended to solve the contradiction of “arge particles are easy to bridge but hard to enter the crack while small particles are easy to enter the crack but difficult to bear pressure” for the traditional inert plugging material.

Abstract:According to the stratigraphic data of Northeast Yunnan， the limestone of Maokou formation of Permian in this area is very broken， and there are risks of well leakage， hole collapse and drilling tool blow-off. Casing wall protection method was adopted in the past drilling construction in this area， which has high cost and labor intensity. The introduction of X-A film-forming mud system during the construction of Yundi-4 well has a good effect on restraining and balancing the retaining wall of Maokou limestone formation such as loss of block， collapse and imbalance of formation pressure. All kinds of possible engineering risks are effectively solved and good economic benefits are obtained.

Abstract:The stability of the borehole wall is an important condition for the smooth drilling of the borehole. Reasonable wall protection technology can effectively keep the stability of hole wall， especially in the process of complex formation drilling. It is necessary to adopt suitable wall protection technology to keep the stability of hole wall to achieve the purpose of smooth drilling. During the Xiangnan No.1 Deep Drilling， the strata in several hole sections were extremely broken，and serious hole wall instability occurred. After analyzing the stratum and on-site construction technology， a set of systematic wall protection schemes were formed for different hole sections. Through the comparison of the actual wall protection effect on site，it is found that the flushing fluid is suitable for the wall protection under the condition of slight leakage， the follow-pipe drilling process is suitable for quickly passing through the local extremely broken formation， and the cement ball mixed with the cement slurry has a good effect on the protection wall of the extremely broken formation. Different retaining wall technologies have their own advantages and disadvantages. In the actual drilling process，the targeted selection of high-efficiency retaining wall technologies is of great significance to improve drilling efficiency.

Abstract:The Dandong 3000m scientific deep drilling project in Liaoning Province is the core task of the sub-project of the national key research and development plan “Demonstration of Deep Mineral Exploration and Storage in Liaodong/Jiaodong Ore Concentration Area”. This paper introduces the general situation of 3000m scientific deep drilling in Dandong， Liaoning Province and several key technologies. By adopting new tools such as HXY-8VB modified frequency conversion vertical shaft drill， lengthening drilling tool supporting anti-blocking inner pipe and quick fishing spear， the research and application of efficient diamond core bit were carried out， and the application of flow big data analysis and dynamic pretreatment system in deep geological drilling process was carried out. All drilling construction tasks were completed with high quality and high efficiency. It sets the record of the first deep hole in the exploration of non-coal solid minerals in eastern Liaoning. It provides a strong support for rerifing the metallogenic conditions ，evaluating gold resource potential below 3000m in this area and also provides technical references for extra-deep hole drilling construction.

Abstract:ZK4816 borehole is the first drilling with a depth of 1000 meters implemented in Zhaishang gold deposit area， Min County. For the problems of difficult drilling， wall protection etc. in complex formation of mining area， through the implementation of deep core drilling project， drilling technology research and practice were carried out simultaneously， and technical measures such as GSP drilling fluid， enlarged diameter drilling tools and directional drilling were successfully applied. The drilling depth reached 1172.88m. The wall protection period of GSP drilling fluid was three times longer than that of natural plant gum drilling fluid. Drilling with enlarged diameter drilling tools can form a large annular gap and greatly improve the ability of drilling fluid to carry coarse rock powder. The application of “GSP drilling fluid & enlarged diameter drilling tools” technology effectively ensures the deep hole construction. This paper provides a reference for the next deep core drilling work in complex strata.

Abstract:The geological conditions of Hadamen mining area in Inner Mongolia are complex， and the upper and lower plates of the ore seam in the area are chlorite and petrified alteration belts， with a thickness of tens of meters to hundreds of meters， involving crushing， leakage and water-sensitive strata， and the phenomenon of diameter reduction， leakage and collapse in drilling construction is common， which seriously affects the drilling efficiency. Taking the ZK20312 drilling hole in the mining area as an example， after two waste holes， combined with the drilling difficulties， targeted solutions were proposed， and good results were achieved in the third construction through scientific design of the hole body structure， reasonable allocation of flushing fluid， and reasonable formulation of accident response measures in the hole， and all quality indicators met the design requirements. The construction experience of this type of complex formation is comprehensively summarized， which can provide reference for other similar conditions.

Abstract:The western area of Zhen’an， South Qinling， is a key area for molybdenum tungsten polymetallic prospecting. Most of the strata in this area are limestone and dolomite. The topographic is large， the terrain is steep， and the karst is developed. There are many karst caves encountered in the drilling construction process. The structure is very developed. There are many fault tectonic belts drilled， the local cores are broken， and the collapse blocks in the holes are strict. Heavy， deep hole construction is more difficult. During the construction process， by optimizing the drilling parameters， taking various leakage plugging measures to fill the karst cave， allocating flushing to deal with the collapse and falling blocks in the hole， adjusting the density of flushing to deal with deep water inrush， solving many construction problems such as difficulty in adopting the core of the tectonic zone， and improving the drilling efficiency. The ZK5201 hole found the skarn-type tungsten mineralization belt and the Indo-Yanshan period granite hidden rock mass. The drilling construction task is successfully completed. The green exploration method is adopted to ensure that the drilling construction site and surrounding water bodies are not polluted， and provide reliable experience for the construction of the same type of deep hole drilling in the area in the future.

Abstract:The exploration and drilling of the Nalinggou uranium deposit in the Ordos Basin has some technical problems， such as low heart rate of loose sandstone core， slow drilling efficiency of core-gravel layer， low drilling efficiency of mudstone formation and easy deviation of drilling hole. The project team adopts various technical measures， such as various core mining methods， mud maintenance， optimized use of drill bit and reasonable drilling tool grading. Good results have been achieved in the aspects of keeping straight and preventing deviation， improving the adoption rate， and improving the drilling efficiency of gravel and mudstone， which better solves the above difficulties encountered in the construction， improves the drilling efficiency and drilling quality， and accumulates more valuable experience in sandstone drilling construction， which provides construction experience for the future drilling construction of sandstone type uranium ore in the north of the Ordos Basin.

Abstract:The continuous increase in prospecting depth is a significant feature of mineral exploration. The deepest borehole of Gaodi Manganese Mine in Songtao County， Guizhou Province is 2001.68m and the shallowest is 1486m. The main difficulty of the construction is the prevention of accidents in the hole and the control of the hole inclination. Starting from the drillinig hole design， equipment configuration， drilling technology， drilling parameters and mud configuration， etc.， this paper provide safeguard measures for the advancement of the project. The deflection law， anti-deflection measures and the most effective construction plan of the deep hole drilling of the Gaodi Manganese Mine in Guizhou Province are summerized， and technical opinions are put forward for the future construction of the deep hole drilling of the Manganese Mine in Guizhou Province.

Abstract:The exploration work for the Gaodi Manganese Mine in Songtao County， Guizhou has fully entered the exploration stage， with an exploration network distance of 200m×300m， with very strict requirements for drilling quality： the deviation of the final hole target point shall not exceed one fourth of the exploration network distance， that is， the parallel exploration line direction shall not exceed 50m， and the vertical exploration line direction shall not exceed 75m. For deep holes with a design depth of over 1400m （the deepest borehole reaches 1950m） in the exploration area， this requirement far exceeds the requirements of geological core drilling regulations. According to many years of deep hole construction experience， the construction units under Bureau of Geology and Mineral Exploration and Development Guizhou Province have taken technical measures to maintain straight and prevent deviation from the aspects of rig base construction， drilling structure and combinatorial optimization of drilling tools， drilling parameter adjustment， and single reamer deviation correction， and achieved good results.

Abstract:A scientific drilling hole with a depth of 3000m was designed for the regional geological survey project （map of Qingxu County and Xugou） in surveying area of Qingxu County， Shanxi Province. Full-hole coring was required with the core recovery rate over 85%， the core diameter over 60mm， and the rock samples should be undisturbed. Aiming at the problems of deep and thick overburden stratum， large diameter， high fidelity and full hole coring， etc.， actions of drilling strata and possible bolehole accidents analysis， CHD127 rope drilling tools application， drilling structure optimization， constant pressure automatic drilling technology and enhancing mud liquid use management are taken， the technology of “water source drilling rig+rope coring+long open hole drilling” was innovatively explored， and the project was completed with high quality. The field practice and application show that the technology of “water source drilling rig+wire-line coring” used in continuous core drilling of deep-thick overburden strata is better than the vertical shaft core drilling machine. The coring tool combined with PVC tube can meet the requirements of rock sample fidelity and quantity preservation， high-quality mud can realize full open hole drilling. The process of “water source drilling rig+wire-line coring+coring tool lined with PVC tube” can be popularized in geotechnical engineering investigation， hydrogeological hole with the hardness of middle or lower and deep hole of coalbed methane exploration.

Abstract:The construction of small diameter core drilling in the tunnel of Gansu Jinchuan Company has poor geological conditions and low construction efficiency. The newly launched deep ore exploration drilling project in the second mining area generally has a meterage per rig-month of no more than 150m， and there are many drilling accidents and scrapped boreholes. The main reason is that there are many accidents in the hole caused by the high pressure of the surrounding rock and the instability of the hole wall caused by water gushing during drilling in the altered formation. The effect of mud wall protection is not ideal， and drilling tool breakage and new hole phenomena often occur during hole cleaning. When drilling with a depth of more than 300m， it is common to encounter stuck or buried drilling accidents. Based on the construction experience of the mining area， this article proposes economic and practical treatment methods for drilling in complex formations with high stress and strong corrosion： drilling with casing， mud mixing， high-pressure grouting， and handling of stuck drilling accidents. Among them， high-pressure grouting is rarely used in the construction of complex formations in small diameter core drilling. In suitable formations， grouting can not only reduce the number of casing used， but also improve the stability of the hole wall. It is a practical and worth promoting technical method.

Abstract:The implementation of green exploration in Henan Province is still not ideal. Demonstration of green exploration engineering is urgent need to standardize the whole process of exploration work. Research and practice of green exploration technology is in a gold mine area of Henan Province is made， by which design technology of “replacing trenching with drilling， multi-holes at one position and multi-branches in one hole” are explored. Selection and relocation of drilling machine， field construction， configuration and management of drilling fluid and field recovery are all researched， and a set of green exploration workflow for Henan Southwestern is summarized. In which green exploration concepts in design is adopt to reduce the damage to vegetation caused by exploration work， detachable modular drilling rigs， portable supporting facilities and relocation equipment are try to use during construction and migration， lightweight， movable， and reusable facilities are adopted if possible， finally， the garbage and slurry generated during construction are transported to units with processing capacity for centralized treatment. As a result， the impact is to the maximum extent reduced on the land， vegetation and environment. This project has achieved a good demonstration effect. At the same time， the successful experience of green exploration is gradually promoted into future projects construction.

Abstract:There are abundant geothermal resources underlying in Xiong’an New Area， and the Wumishan carbonate geothermal reservoir of Jixian System has been the prior target geothermal reservoir so far. Highly developed fracture network of Wumishan carbonate geothermal reservoir in Xiong’an New Area leads to severe lost circulation of drilling fluid during geothermal drilling， and thus geothermal reservoir damage， which causes the decline of geothermal well productivity. In order to achieve the shielding of fractures during geothermal drilling in conjunction with reservoir protection， which aims at maximum productivity improvement， it is proposed that the application of shape memory polymer with shape memory effect sensitive to temperature could be feasible for temporary shielding during drilling in Wumishan fractured carbonate geothermal reservoir in Xiong’an New Area. Temperature sensitive shape memory polymer is capable of effectively dealing with the lost circulation problem induced by highly fractured target geothermal reservoir， while guarantees the maximum geothermal reservoir protection by thoroughly exiting from the fractures， and its application is a promising temporary shielding technology for fractured carbonate geothermal reservoir， which provides a novel technological method for efficient drilling and geothermal reservoir protection in Xiong’an New Area.

Abstract:D19 is an exploration well in the geothermal clean energy survey and evaluation project in Xiong’an New Area. During drilling process， research and application of the various research and application on key technologies such as drilling process， drilling bit and drilling fluids are carried out， by whcih the drilling efficiency of deep geothermal is improved， the difficult problem of the complex strata drilling in the deep geothermal drilling of well D19 is solved， the target thermal reservoirs is protected， the drilling construction task is successfully completed， and the geological structure and heat storage characteristics are identified by well logging and pumping tests. In this paper， the key drilling technology and achievements of well D19 are summerized which can provides technical support for similar drilling projects and promote the development of deep geothermal drilling.

Abstract:Layering pumping tests were carried out for the two thermal reservoirs of Wumishan and Gaozhuang Formation under the premise of drilling safety ，and the hydrogeological test results of two deep hot bedrock reservoirs were obtained for the first time. The basic technical procedures were explored for the subsequent drilling construction of geothermal exploration wells and hydrogeological exploration in Xiong’an New Area， and the work model was formulated， which is of great significance for the standardized implementation of geothermal exploration in Xiong’an New Area.

Abstract:Geothermal energy is a kind of renewable energy sources which is clean， safe， reliable and stable. LQDR-1 is a geothermal hot spring well with a design depth of 3500m and an actual drilling depth of 3201.2m. The geothermal reservoir is fracturing type， with a small designed target area， strong drilling pertinence and purpose， large dip angle and poor drillability. In the first and second well section， the LQDR-1 well adopts a drilling assembly of tapered + pendulum type in order to reduce the horizontal displacement at the bottom of the well and improve the hit rate. Through optimizing the drill collar string and drilling parameters， the entire well maintains a lower wellbore inclination and higher wellbore quality. In the third and fourth well section， the air-lifting reverse circulation drilling technology was used to drill into the geothermal reservoir， which can solve the problem of poor cutting carrying capacity in the annulus of large-diameter and multi opening geothermal wells， on the other hand， the damage to the reservoir can be avoided or reduced， the maximum water output capacity of the formation is maintained， and the water output of a single well is increased.

Abstract:Well No.WLCK1 is a mineral water well integrating exploration and mining， with Well depth of 201.38 meters， and a final hole diameter of exploration is ?150mm. It’s drilled to Shaximiao formation （Mesozoic red layer） of middle jurassic system and disclosed that two water-rich fault structure zones in which mineral water characteristics quality indicators are greatly different. In the implementation of exploration wells， the technical problems should be solved， for example， the formation of pollution-free processes/materials. The location of each water outlet layer， the amount of water intake and the limit characteristic index of mineral water are obtained in real time and accurately. To overcome the influence of large inflow aquifer on determining the optimal value of mineral water resource aquifer and well structure； Cementing and sealing during well completion. It’s required to adopt some technical measures， such as air drill hammer/composite drilling technology， cementing well with aluminate cement， sealing the water temporary wihtcasing， multi-level pumping and using insert-type to cement well based on drilling geological structure. Finally， the optimal mineral water is achieved and high well quality is also achieved. That’s a reference to construction of similar mineral water exploration well.

Abstract:In the Neogene formation of eastern Henan province， the traditional and emerging non-granulation well forming process are being applied. In this paper， by comparing the water output of multiple wells with adjacent positions， similar depth， similar well structure and similar water intake layer level in the region， and analyzing the formation factors， drilling diameter， well washing method and well formation process factors， the main reasons affecting the water volume under specific conditions are found out. It provides a reference for selecting a suitable well-forming process in different regions.

Abstract:In order to accurately measure the depth and inrush of groundwater levels of different aquifers， the groundwater exploration project of Dongjiang Coal Base in Xinjiang uses an in-pipe stopper to stop the water in a hydrogeological exploration hole. Through the layered pumping test， the hydrogeological parameters of different aquifers were obtained. The pumping test of three landing processes of different aquifers in a hydrogeological exploration hole solves the problem that the hydrogeological parameters of different aquifers need to be obtained by implementing two exploration holes， saving the cost of well pipes， gravel and other materials， shortening the time of lowering pipes and filling gravel， and accelerating the progress of the construction.

Abstract:Tianye-1 well is a geological survey well for shale gas， which deployed in the southern Tianba anticlinal core of the South Daba Mountain curved fold belt， Chongqing. The design purpose is to complete the selection of shale gas favorable target areas in the southern Marine shale area， explore new strata， and collect the basic geological data of shale in the mineral area. In view of the probleums of the design dip angle of the opening rock is changed due to steep dip， the wall spalling instability caused by the strong water sensitivity of shale， the high pressure and H₂S and CO gas penetration corrosion in the inner well， and the induced blowout. Technologies are adopted such as the high density drilling fluid technology， CHD127mm wireline coring technology and gyro inclinometer combined with eccentric wedge orientation to increase the thickness of drill pipe joint to improve the strength of drill pipe. The safety hazards such as high pressure overflow， drill pipe fracture， H₂S and CO gas penetration， etc. are well solved， the well inclination is controlled， and the geological survey coring task of the well is successfully completed. This paper summarizes some technical experience and problems exist in the drilling process， and provides reference experience for similar projects.

Abstract:In order to explore the stratigraphic situation in the northern part of the Songliao Basin and evaluate and predict the oil and gas prospects of the Perom-carboniferous system， our team participated in the implementation of four oil and gas geological survey wells in the area， with a design depth of 2000m. Our team used the small diameter wire-line core drilling process for full hole coring， and successfully completed the design requirements in terms of technical indicators such as heart rate and coring quality. Due to the complex sedimentary strata in the northern part of the Songliao Basin， most of which are mudstone and sandstone formations that are prone to hydration， complex well accidents such as collapse， block falling， and shrinkage occur， which affect the progress of drilling accidents and the quality of coring. To ensure the smooth implementation of drilling， our team further optimized the drilling tool combination and drilling parameters based on the drilling formation conditions during the drilling process， selected a film forming and anti collapse flushing fluid system with strong wall protection performance， and successfully completed the drilling construction task and achieved good drilling results.

Abstract:In order to improve the efficiency of coalbed methane resource development and utilization， a high-efficiency drilling technology based on near bit geological guidance is proposed to address the problems of delayed layer identification by conventional remote gamma and EMWD instruments， low resolution of thin coal seams， and easy formation of wellbore trajectories. Taking a coalbed methane block in Qinshui Basin， Shanxi Province as an engineering example， the construction situation， application characteristics， and effects of multiple horizontal wells arranged in the block are elaborated， and a set of promotable and effective methods is summarized. The replicable high-efficiency drilling technology for horizontal wells of coalbed methane， including the use of flexible drilling tool combinations， the selection of reasonable drilling parameters， and the combination of fine control technology for wellbore trajectory， provides technical reference for the efficient development and utilization of coalbed methane.

Abstract:Lop Nur salt lake deep potash scientific drilling Well 2 （LDK02） has a completion depth of 1200m， which is the first deep potash parameter well in Lop Nur salt lake district. The successful application of loose layer coring， high salinity brine drilling fluid， and closed depth sampling technology has solved malignant wellbore accidents such as easy shrinkage and sticking of drilling in gravel and sand layer coring， unstable block falling and collapse of drilling fluid salt immersion wellbore. The same diameter sealing process simplifies the drilling structure； The fixed depth sampling technology maintains the relative stability of the original components of the water sample， laying the foundation for studying the distribution and spatiotemporal evolution of potassium rich brine at different depths in this area.

Abstract:Potassium salt mine is one of the minerals urgently needed in our country. JG-2 well is a geological data survey well arranged in Jinggu sag in order to further identify the potassium salt resources of Mengyejing Formation in Simao Basin， Yunnan Province. The formation lithology is mainly mudstone， sandstone， breccia and stone salt， etc. During the construction， the hydration expansion and spalling of mudstone and breccia caused the safety hazards of shaft wall collapse， diameter reduction and bit balling. Potassium salt rock layer is easy to dissolve， dissolution leads to super diameter， core dissolution， diamond bit in stone salt layer mechanical drilling rate is low， sandstone fracture leakage and other problems. By using the key technology of “Potassium-magnesium-based saturated brine drilling fluid”， improving the bit structure， using PDC bit and using bridge plug plugging method， the problems of core dissolution， leakage， bit balling and low drilling efficiency are better solved. The drilling depth is 1829.44m and the drilling diameter is 133mm. Salt bed core recovery rate of 97.38%， obtained high quality potassium rock core and drilling quality. This paper summarizes the technical experience and existing problems in the smooth implementation of JG-2 well， which can provide reference experience for similar projects in the future.

Abstract:Rui 13A is a green mine brine-mining docking well with one-in-two-out or two-in-one-out brine mining method. The designed well depth is 1138.3m， and the actual drilling depth is 1285m. The main strata are Cenozoic Guanzhuang Formation， Fengxian Formation and Paleogene， and the main lithology is fine sandstone and marl mainly cemented by siltstone， mudstone and argillaceous. There is a set of sedimentary rock series containing salt minerals. The rock types are mainly chloride rock， sulfate rock （anhydrite， glauberite）， carbonate rock （dolomite）， argillaceous rock and siltstone. In the construction process， there are complex problems such as collapse， falling blocks， and the formation with large friction resistance is easy to shrink in diameter. YZ （high-efficiency inhibitor）， RH （high-efficiency lubricant）， etc. With the adjustment of density， a saturated brine strong anti-slump flushing fluid system was formed. The fluid loss is≤5 mL， the rheological performance and the anti-slump inhibition effect are good. It has achieved good application results on site， ensuring the smooth implementation of the project.

Abstract:As the main drilling structure for sandstone type in-situ leaching uranium mining， the gravel filling structure drilling （one-time well completion process） has been applied in multiple uranium mining areas in China. However， during the application process， problems such as easy blockage and damage of filters， long flushing time required， and short service life of drilling have gradually become prominent. This article analyzes the problems existing in gravel filling structure drilling， and focuses on the reasons for the problems， including the drilling structure. The construction process innovation has been carried out in areas such as grouting technology， mining and aquifer cutting technology， installation of built-in filters， and reverse gravel casting， forming a new type of window cutting and drilling construction technology. In the past two years， the new window cutting drilling construction technology has been applied on a large scale in a uranium deposit in Xinjiang， and the application effect is good， effectively solving the problems existing in the gravel filling drilling construction technology.

Abstract:The process of piston-insertion core sampling uses drilling fluid static pressure as the power， and the internal pipe of the core is directly inserted into the formation to complete the core sampling. This processing method avoids the direct scouring of the core by drilling fluid and the influence of drilling tool rotation on the core， therefore， it can greatly improve the core sampling rate and quality of shallow weak oceanic strata. This drilling tool has been studied and applied in ocean scientific drilling， achieving good utilization results. Through research on the piston-insertion core sampling technique， design and usage experience are obtained， key problems of the piston-insertion core sampling technique are solved， and a process method for surface seabed core extraction is formed， providing technical support for ocean drilling.

Abstract:It takes a lot of time to go out to change the bit in geological drilling construction， and there are certain safety risks， which greatly affects the drilling efficiency. Using the drilling technology of replacing the bit without lifting the rod can solve this problem well. Using the 95 specification wireline coring drill pipe as the platform， the basic structure of BH-75 drill pipe was used， and in view of the existing problems， the BH-95 specification drill pipe without lifting drill bit change was developed. At the same time， the BH-75 drill pipe was improved according to the specific structure of the 95 specification drill pipe， so as to improve the bearing capacity and convergence （delivery） stability of the drill pipe， and automatic sand removal mechanism was added. The technology was applied in the Taodi 1 well （geothermal well） in Yichun City， Jiangxi Province. The drill bit was changed without lifting drill at the hole depth of 680.65~704.25 meters. The success rate of drilling tool in place was 100%， the core recovery rate reached 99.4%， the core quality was good， and the tripping times were reduced to a minimum， effectively preventing the hole accidents caused by tripping. The drilling technology without lifting drill Bit Change provides timely optimization of drill bit usage plans， reducing energy consumption， effectively protecting hole wall safety， and reducing labor intensity for drilling in formations with strong abrasiveness， slipping， and frequent alternation of soft and hard in deep hole geological exploration.

Abstract:In-situ remediation technology has become the mainstream of contaminated site management， but in-situ remediation technology is prone to slurry return， resulting in secondary contamination of the soil. In this paper， we designed a packer for in-situ remediation of contaminated sites using the principle of hydraulic expansion and elastic contraction， which can meet the requirements of the rotary injection process and enable the recycling of the packer. A model of the action mechanism of the packer was developed using FLAC3D， and the radial stress and displacement of the soil layer under different input pressures were analyzed at the microscopic level. The simulation results showed that the effect of the packer on the cohesive soil layer is in the range of about 1.5m. This study provided a reasonable reference for the optimization of in-situ remediation techniques for contaminated sites.

Abstract:The resource exploration is gradually developing into deep exploration in China. Due to the vast territory of China， the strata encountered are quite complex and diverse， which brings great difficulties to the exploration of deep resources. Wire-line coring has become one of the commonly used coring methods in deep resource exploration due to its advantages of “four high， three low and two good”. However， there are still some shortcomings such as low core recovery rate in complex strata and failure of pipe salvage. In order to improve the core recovery rate of wireline coring drilling tool in complex formation， the structural optimization of the cutting mechanism of S75 drilling tool was carried out， and the dynamic simulation was carried out by ABAQUS. The results show that the improved drilling tool has reasonable size and compact structure. It can realize the coring work in complex strata by using a set of drilling tools，has all-strata self-adaptive ability; and has the advantages of avoiding the replacement of drilling tools when drilling loose， soft， hard and brittle strata， and effectively avoiding the failure of internal pipe fishing.

Abstract:The torque impactor can convert the kinetic energy of drilling fluid into high-frequency circumferential kinetic energy of the lower drilling tool， thereby eliminating stick-slip vibration， protecting PDC drill bits， and improving construction efficiency. During the construction of two geothermal wells in Baise， Guangxi and Bijie， Guizhou， due to the influence of soft and hard interlayers， the stick-slip vibration effect was strong， causing the composite pieces of PDC drill bits to quickly collapse and the drill bits to be scrapped in advance. A composite drilling process of torque impactor + screw drilling tool is used. By reasonably designing the drilling tool combination and drilling parameters， compared with the simple screw drilling process， due to the effective control of stick-slip vibration， the phenomenon of tooth collapse of the drill bit composite piece is significantly reduced， the service life is increased， and the average mechanical drilling speed is increased by more than twice， Overall construction efficiency and economic benefits has been improved. It provides a new solution for the construction of formations prone to stick-slip effects such as soft and hard interlayers.

Abstract:A safe and reliable built-in hanging hammer of simple structure is developed， which solves the problem that the hanging hammer cannot be applied in power head drilling rig due to space limitation. The design idea， structure principle， operation method， precautions for safe operation and field application are introduced. The practice shows that the tool can effectively deal with the casing or drill pipe stuck or buried in the upper hole and also can cooperate with other tools to deal with the casing or drill pipe stuck or buried in the bottom hole. The tool is not only suitable for power head core drill， but also for vertical-type drilling rig. Since applied by our company in 2017， the tool has successfully dealt with more than 600 meters of stuck casings or drill pipes， which produces a marked effect. The tool provides a new solution for handling the stuck wireline core drilling tool used in the power head core drill， especially provides a useful supplement for portable drilling rig to paly a role in green exploration.

Abstract:In geological exploration， coal mining， oil exploration and geothermal resource development， near-bit MWD plays an important role in real-time detection of engineering parameters such as tool attitude and formation geological parameters， and implementation of guided drilling. This paper introduces the working principle of MWD system focusing on the physical model of attitude angle and its solution， at the same time， based on the domestic high temperature resistant programmable logic gate array （FPGA） chip， three-axis acceleration sensor and three-axis reluctance sensor， the near bit MWD system is designed. The test results show that the performance index of the system can meet the practical engineering application.

Abstract:This paper mainly introduces the basic working principle， technical performance and application of hydraulic pipe cutter for small diameter drilling in geological core drilling in southern Shanxi and Beishan areas. The practice shows that compared with other types of pipe cutters， the hydraulic pipe cutter has the advantages of simple design， convenient operation and high working efficiency. It has played a huge role in the treatment of drilling stuck， buried drilling and other accidents， and has achieved good application results. At the same time， there are also some problems in the practical application of hydraulic pipe cutter， such as the welding quality of the tool head is not high， the existence of ring cutting vibration and the phenomenon of the tool head falling edge. Through the analysis and summary of the actual application， some suggestions are put forward to improve the existing problems， so as to promote the application of the equipment.

Abstract:According to the green geological exploration work standard， the borehohe drilling should be given priority to modular， lightweight， miniaturized and highly integrated drilling equipment. Based on the demand for rapid verification of strategic mineral survey drilling， the development of a portable drilling rig with air circulation technology can reduce the volume， weitht and power consumption of the drilling rig， reduce manpower， alleviate the green technical problems faced by traditional drilling， and support the evaluation and optimization of exploration blocks. This paper mainly introduces the structure form， technical parameters， technological method and test of portable air drill. A set of drilling technology for quick verification of mineral resources in shallow covered areas is preliminarily summarized to realize green exploration.

Abstract:Air reverse circulation sampling drilling technology is a relatively mature and advanced process technology in foreign countries， which has the advantages of high construction efficiency， low production cost and good exploration effect. However， domestic use is relatively small. In view of the current domestic demand for air reverse circulation sampling drilling rigs， when analyzing the mobile safety coring efficiency and drilling safety of complex formation drilling rigs， a new full hydraulic air reverse circulation drilling rig using electronically controlled load feedback system—YGL-220RC reverse circulation sampling drilling rig was developed. The on-site use results show that the electronic control and manual cooperate with each other， so that it has the advantages of strong adaptability， energy saving and environmental protection， smooth crawler walking， simple operating system， stable full hydraulic system， less auxiliary time， convenient and fast loading and unloading drilling tools， multi-angle construction， and more humanized details. It solves the problems that arise at the construction site and during the construction process well. Compared with the high cost and technical restrictions of foreign countries， YGL-220RC reverse circulation sampling drilling rig well solves the needs of sampling drilling efficiency， energy saving and environmental protection in today''s drilling market.

Abstract:According to the current two-bench drilling and blasting construction methods of highway and railway tunnels， In order to meet the construction requirements of the cannon hole in the palm and system anchor rods and locking anchor rod holes of the hole wall， the MG-20S tunnel anchoring drill has been developed. The machine is three arms of curved arm amplitude mechanism， with all-round drilling attitude adjustment function， drilling construction can realize automatic / manual control dual mode， free switch， in the automatic control mode， only a button can control the rock drill rotation， impact and feed， and the drilling parameters can be adjusted in time according to the working conditions； using wireless remote control operation and manual operation of the cab with one key switch， only one person can operate to form a hole； it can realize the function of one-key to display car and one-key to collect the car， timely completion of anchor， drilling， injection process and loading， blasting， slag transport and other processes of efficient switching， make various processes professional， standardized. The industrial test shows that the drilling rig is reliable and effective， and all parameters， functions can meet the requirements of the construction technology of anchor and drill in two-bench of the tunnel.

Abstract:In order to treat the waste drilling fluid produced during geological drilling， the overall structure design of the waste slurry treatment equipment FJS-1A is carried out in combination with the waste drilling fluid treatment process flow. The working principle and main performance parameters of the equipment are introduced. The laboratory test and field test results of Qinghai Gonghe Dry-heat Rock Drilling Project show that the gel breaking flocculation module set by the waste slurry treatment equipment FJS-1A can effectively destroy the stable system of drilling fluid and separate the solid-liquid. The solid-liquid separation module can effectively separate the solid phase and waste water， and the oxidation module can effectively treat the waste water. The final treated waste water can reach the national sewage secondary discharge standard and meet the treatment requirements of waste drilling fluid in geological drilling. The successful development of this equipment can provide some reference for green exploration.

Abstract:The occurrence of well leakage in drilling engineering not only seriously affects safe， fast， and low-cost drilling， but also seriously pollutes the ore layer and affects its production. The research on methods and instruments for determining the location of leakage layers is of great significance for drilling production under complex geological conditions. This article elaborates on the composition， parameter acquisition process， processing principle， mechanical structure， and testing situation of the developed CLY-1 multi-parameter intelligent leak detector. The lower probe tube of the multi-parameter intelligent leak detection system is directly connected to the lower end of the drill pipe or steel wire rope and placed into the hole for testing. The inner probe tube in the hole performs numerical testing on four parameters such as mud flow rate， well temperature， well pressure， and natural gamma along the depth of the hole， and stores the collected data in a certain format in the memory. After the probe is removed from the well， it is connected to the ground computer system to store the collected data in memory to form a digital document， providing relevant personnel with the basis for identifying leakage and surge layers.

Abstract:In deep drilling， the high temperature and high pressure environment underground places higher requirements on the performance of drilling fluids. Rheology is an important property of drilling fluid， and ensuring the stability of drilling fluid rheological properties under high temperature and high pressure conditions is a necessary prerequisite for safe drilling in deep wells. High temperature and high pressure drilling fluid rheometers are important to measure the high temperature and high pressure rheological properties of drilling fluid. This article briefly introduces three high temperature and high pressure drilling fluid rheometers that are currently needed in deep drilling， including their functional characteristics， main technical parameters， and applications. The aim is to provide reference for drilling workers to correctly select relevant testing instruments， improve drilling safety and efficiency.

Abstract:In deep-sea drilling， the drilling process without a riser is not limited by the length of the riser， and can carry out drilling operations within all water depths. However， as the water depth increases， the difficulty of drilling tools re-entering the borehole is extremely high， and the drilling re-entry system is particularly important for drilling without a riser. The working conditions of deep-sea drilling are very complex， and due to various factors such as ocean waves and currents， the drill string is approximately a flexible rod. Without the use of ROV， the conventional drill string re-entering operation takes a long time and has a low success rate. Even if the drill string is moved by the upper moving ship due to sea conditions， it is difficult to achieve. Therefore， studying the deviation control technology of the drilling re-entry system is of great benefit for deep-sea drilling. By analyzing the posture and efficiency of the drill string re-entering the borehole in a free state， a drilling re-entry system with a driving device is used to balance the hydrodynamic effect at the bottom of the drill string， effectively ensuring the stability of the bottom drilling tool during re-entering the borehole， minimizing the re-entery drilling time， and reducing the cost of the deep-sea non riser drilling process.

Abstract:When traditional single derrick drilling platforms and drilling vessels working， the connection and lowering of other parallel auxiliary pipelines are unable to simultaneously complete， therefore， a concept of offline operation in the moon-pool area is proposed. A power device on the blowout preventer trolley in the moon-pool area is installed which can lift， lower， and suspend pipelines. Combined with the original drilling system’s supporting equipment such as catwalk machines， pipe racking machines， and iron roughneck， the installation， lowering， and suspend drill string， casing string， and other pipe strings in the moon-pool area can be achieved. As a result， when the ocean single derrick drilling platforms and drilling vessels working， the connection of pipe strings in the moon-pool area can be operated parallelly， which can save a lot of drilling auxiliary operation time and greatly reduce the drilling cost.

Abstract:As the main lifting system power equipment of deep well drilling rig， the advanced design of winch is of great significance to the overall performance， efficiency and cost control of drilling rig. At present， the domestic and foreign deep drilling rig generally uses asynchronous variable frequency motor and gear reducer as the winch transmission device， which has low speed （constant pressure， constant speed drilling） instability， complex structure， heavy maintenance workload， high energy consumption cost. Based on the existing lifting power design technology of drilling rig， this paper presents the design and application of a permanent magnet synchronous motor in the lifting system of deep drilling rig. First， a dual motor direct drive system without gearbox was designed according to the characteristics of permanent magnet synchronous motor， and then the corresponding electronic control system was designed based on the vector closed-loop control technology. Finally， its typical operating characteristics were tested and analyzed on the practice， and the energy consumption was compared by comparing the traditional electric drilling rig of the same model in the same well site and the relevant conclusions were drawn. In contrast， the permanent magnet synchronous motor drawworks has the characteristics of simpler structure， lower maintenance and energy consumption costs. The operating characteristics and energy consumption of the same type of drilling rig are analyzed and compared.

Abstract:XY series vertical shaft core drill is the main type of our country’s small-caliber ore prospecting construction， among which the XY-6 vertical shaft drill with large market can meet the needs of solid mineral exploration within 2000m， it is difficult to support a new round of prospecting breakthrough because of its disadvantages such as mechanical transmission， manual operation of belt-making and lack of drilling data， so it is urgent to upgrade XY series mechanical vertical shaft drilling rig. This paper mainly introduces the upgrading of the XY-6 vertical shaft drilling rig based on its frequency conversion electric drive and digital control， the XY-6DB new electric drive vertical shaft drilling rig has carried on the frequency conversion transformation of the rotary power unit， the electro-hydraulic control upgrade of the hoisting brake system， the manual-self-integrated shift mode and the digital control upgrade transformation of the whole rig， finally， the whole machine can realize the goal of saving energy， increasing efficiency， reducing labor intensity and improving safety.

Abstract:The operation of traditional water well drilling rig， such as pressure drilling， is greatly influenced by the operator’s experience， and the working environment and safety conditions are also poor. An TSJ-3000 water well drilling rig has been upgraded automatically to better meet the needs of the construction of middle-deep geothermal wells. The original equipment is not changed， and the driller’s room is added； The servo control system is used to realize the function of lifting and lowering the drill by the touch rocker and the function of automatic constant pressure drilling. Adopt automatic sensing shift module to realize quick shift and speed change in the driller’s room， so that the driller’s room is far away from the rig turntable； Using industrial control screen touch mode to integrate the main electric cabinet controller on site； Two independent operating systems， automation and manual operation， are realized. The field test and application show that the operation parameters of the drilling rig can be monitored and displayed in real time after the automation upgrade， which provides scientific basis for judging and preventing accidents in the hole. It can meet the requirements of lifting and tripping under the condition that the drilling tool of 3000 m water source drilling rig has a hanging weight of 800kN， and the drilling efficiency is 61% higher than that before the transformation. The labor intensity is reduced and the operating environment is improved. This project conforms to the development trend of automation， digitalization and intelligence of drilling equipment， and has a good application prospect.

Abstract:The L-type horizontal well is the main type of coalbed methane development. At present， the construction equipment of the L-type horizontal well of coalbed methane in China are all standard oil rigs， but the equipment configuration and transportation cost of the oil rigs are higher. The water source drilling rig purchase cost is lower， farther many geological prospecting units are originally equipped with the water source drilling rig. Therefore， on the basis of studying and summarizing the equipment principle， main parameters and difference characteristics of conventional water source drilling rigs and oil drilling rigs， this paper has carried out 4 improved designs for TSJ-3000 water source drilling rig， to achieve standard oil rig performance. At the same time， according to the geological condition， working environment and construction technology of coalbed methane horizontal well， 4 lifting designs for improving TSJ-3000 water source drilling rig are carried out， includes the mud logging device while drilling， hydraulic tongs， submersible blowdown equipment and pneumatic winch， in order to meet the construction requirements of L-type coalbed methane horizontal well. The application of the improved TSJ-3000 water source drilling rig has effectively improved the working efficiency and economic benefit.

Abstract:In order to increase the offshore drilling efficiency， avoid the effect of the waves and tides on traditional spindle-type drill， low core recovery and safe risk， the portable drilling rig was tried to be used on the offshore platform rely on the second submarine tunnel survey project of Jiaozhou Bay， Qingdao. Different types of platforms commonly used on the sea were introduced and the drilling and coring implementation solutions of portable drilling rig on offshore fixed platforms and floating platforms were put forward. A wave compensation wire-line drilling and coring solution for portable drilling rig in floating platform was explored. With this solution， the drilling task was completed efficiently and safely. The proposed solution can provide reference and are benefit to marine engineering exploration.

Abstract:The current CO₂ storage capacity is still far below the requirements of the “carbon peak” and “carbon neutrality” goals. Therefore， the diversified CO₂ underground storage methods play an important role in promoting the realization of dual carbon goals. Based on the summary of the current status of CO₂ underground storage， the distribution spatial pattern of carbon source and sink， the treatment of alkaline industrial solid waste， the CO₂ mineralization capacity of alkaline industrial solid waste， and the underground waste space， a storage method of mineralizing CO₂ using alkaline solid waste， and then transporting it into the underground waste space is proposed， which can realize the goal of “treating waste with waste”. Based on the total amount of underground waste space， the amount of underground waste space within 50km from prefecture-level cities， and the provincial-level distribution of underground waste space， the corresponding storage capacity of alkaline industrial solid waste including fly ash， steel slag， carbide slag storage， and CO₂ were calculated respectively. The storage potential of the aforementioned method was demonstrated from both the total storage amount and spatial distribution pattern. Moreover， further study of this method and the advantages in geological engineering is pointed out.

Abstract:To address the problem of CO₂ utilization and storage （CCUS）， injecting CO₂ into reservoirs to enhance crude oil recovery while storing CO₂ is a green， economical and efficient production model. In this study， a three-dimensional three-phase multi-component numerical model for reservoir extraction was developed to study the extraction and storage effects. The results show that CO₂ can effectively reduce the viscosity of crude oil and significantly promote the recovery rate. The cumulative oil production at 400 d with CO₂ injection is 32 times higher than that with water injection. This shows that the extraction means of CO₂ injection has a promising future. The research in this paper further understands CCUS， which is of great significance for achieving China''s strategic goals of carbon peaking and carbon neutrality.

Abstract:Soil and groundwater pollution in China has shown a trend of development from point pollution to zonal and planar pollution. Because the in-situ injection method has the features of no need to be excavation， small disturbance and low cost， it has become a development hotspot and direction of site pollution remediation. At present， a lack of research on the remediation technology of chemical injection is made， which can not meet the needs of site pollution control. Aiming at the problems of large ground disturbance and large drilling workload caused by the traditional remediation agent delivery process， an in-situ precise injection process of point-surface combination was proposed through field test research in hope to achieve accurate and efficient injection， large-area remediation of contaminated strata， lay a foundation for efficient， accurate and environment friendly in-situ remediation of contaminated sites.

Abstract:Groundwater contamination in China has developed from point-like to band-like and surface-like contamination. Traditional remediation materials are roughly placed， difficult to diffuse in the water-bearing media， and there are problems such as stratification of groundwater， variable storage states， difficulty in controlling injection parameters， and easy cross-contamination of various layers of water. To address these problems， this paper proposes an in-situ injection process that integrates vertical/guided drilling， rotary injection， micro-pressure fracture diffusion and expansion seal， develops an integrated drilling-injection tool， summarises the transport of remediation materials and remediation mechanisms during injection， lays the foundation for the design of in-situ remediation systems for contaminated sites， and provides a reference for green and precise remediation.

Abstract:The accurate acquisition and analysis of fracture structure of rock mass is of great significance for the stability analysis of trenchless drilling rock mass in ecologically fragile areas. Based on close-up photogrammetry technology， this paper uses PhotoModeler Scanner software to process the feature point distortion and noise removal of multi-directional rock mass images to achieve accurate extraction of three-dimensional information of dense point clouds， and then establish a triangular mesh， establish dense surfaces according to the triangular network， and finally render the surfaces through data visualization to realize the three-dimensional modeling of rock masses. The established 3D model fracture morphology tends to be consistent with the original fracture， which can realize non-destructive picking and observation of fracture length， average width， area and other parameters， and compare the obtained fracture information， and the results are consistent with the visually reflected fracture development degree.

Abstract:Karst collapse is one of the key issues in shield tunneling through karst formations. It will not only cause damage to oil and gas pipelines， but will also lead to oil and gas leaks， damage to the ecological environment and threaten the lives and property of people living along the route. This paper is aimed at the characteristics of cave development in karst strata encountered by shield tunneling at a site in Yongzhou， Hunan Province. The formulation of a basalt fibre bentonite-cement paste with good rheological and mechanical properties was preferred. In-situ grout filling and reinforcement experiments with basalt fibre bentonite-cement paste were carried out， and the reinforcing effect of the grouting material was tested by means of borehole coring and indoor experiments. As a results， the cores obtained from the boreholes are dense and have a strong cementation strength. The core take rate meets 80% of the construction requirements. The 28d unconfined compressive strength of the grouted consolidation bodies drilled to a depth of 6~7m was small， averaging 0.32MPa， due to the influence of groundwater. But the cores were relatively intact. The 28d unconfined compressive strength of the grouted consolidation at a drilling depth of 7~8m increased by approximately 5.36 times compared to the grouted consolidation at 6~7m. The strength of the grouted solids reinforced by in-situ grouting with basalt fibre bentonite-cement paste is greater than the strength index required for construction， effectively guaranteeing the safety of shield crossing in karst areas.

Abstract:The pile foundation project of Xiaohe Bridge on Zhenwu Road in Taiyuan City has a main pier diameter of 2.5m and a design hole depth of 84m. The strata are complex， with a loose powder fine sand lin the upper and a flow plastic silt in the middle. During the construction， problems such as hole collapse， excessive sediment at the bottom of the hole， and difficulty in installing steel reinforcement cages are prone to occur. In response to the technical difficulties encountered by rotary drilling rigs during the construction of large diameter and ultra-deep piles， through careful analysis and exploration， this paper summarized the technical measures taken by rotary drilling rigs in the selection of drilling rigs， preparation of mud， embedding of casing， borehole drilling， production and installation of steel cages， and pouring of underwater concrete during the construction of complex strata. These measures effectively ensured the smooth implementation of the project， ensured construction quality， and improved construction efficiency.

Abstract:Engineering investigation technology and methods are developing in a diversified direction， and relying on small diameter directional drilling and in-hole testing technology has become a new focus in recent years. Directional drilling technology for engineering exploration can be effectively applied to survey and construction under very complex surface environments， advanced geological prediction， geological disaster prevention and control， environmental monitoring and governance， etc. In order to further exploit the technical advantages of directional drilling in engineering exploration and standardize the market， many industry associations or groups have begun to prepare technical regulations or standards related to directional drilling in engineering exploration. The paper systematically summarizes the application scenarios of near-horizontal directional drilling technology in engineering exploration， analyzes and summarizes the technical connotation and key technologies， proposes and discusses the key directions and key technical content that should be paid attention to during the preparation of procedures， makes recommendations in terms of trajectory design， equipment selection， process technology， drilling tool combinations， coring tools， mud systems， directional instruments， in-hole testing， etc.，which has reference significance for the preparation of relevant standards.

Abstract:Known as the “blood” of drilling, the flushing fluid technology is one of the key technologies in the field of drilling. With the rapid development of information technology, the establishment of professional technical database has become a new way to improve the technical level of flushing fluid. In this paper, the geological drilling flushing technology researches, data and application cases are summarized comprehensively and systematicly, the first database for geological drilling flushing fluid in China has been developed to provide technical support for drilling workers in view of the complex formation. The database includes 10 first-level modules and 39 second-level modules, which can realize the functions of flushing fluid design, auxiliary calculation, technical data consulting, etc. A large number of results such as new materials, new systems, new processes, as well as the selection and design of flushing fluid have been released. The database has been made available to Internet users on the China Geological Survey’s “Geological Cloud” platform in October 2022.

Abstract:As a technical method， geological drilling has experienced several twists and turns in the national policy in the past 20 years， and relevant enterprises have also experienced “leapfrog” to “desperate survival”. At present， the traditional geological drilling market is expected to recover and the service field has broad prospects. In the increasingly competitive environment， how to break through its own difficulties， solve the problems that restrict development， grasp new opportunities and seek new development is the question that every geological drilling enterprise should focus on. This paper introduces the management concept of excellent performance model， analyzes the current operation and management status of geological drilling enterprises in combination with its core values， and puts forward corresponding operation and management measures in order to enhance the management awareness of geological drilling enterprises and seek high-quality development of enterprises.

Abstract:With the development of the times and the progress of science and technology， informatization has played a subtle role and influence on people''s work and life. In the field of drilling engineering， geocloud 3.0 platform provides massive data support and information sharing for the drilling industry. Combined with the release of the geocloud 3.0 platform of the China Geological Survey， this paper focuses on the contributions and achievements of the geocloud 3.0 platform of the exploration technology research institute. From the perspective of drilling engineering， this paper introduces in detail how to apply the geocloud platform and drilling data to solve the problems in the drilling industry， so as to facilitate the employees of the drilling industry and make it more efficient conveniently use geocloud platform and drilling data topics， improve work efficiency and quality， and promote the process of informatization.

Abstract:Drilling accidents can cause serious economic losses， wasted time， and even threaten life safety. If the drilling equipment can judge the type of accident in time， the accident processing time can be shortened and the development of the situation can be contained. To solve the above problems， this paper proposes a drilling fault diagnosis model of equipment based on neural network. In order to optimize the correct rate of different neural networks in drilling accidents classification， two neural network models of BP and RBF are constructed respectively in nntool of Matlab. Through the simulation test taking the variation trend of construction parameters in a mining area as input parameters， it is found that the best performance in BP neural network is LM and BR algorithm， and the best performance of RBF neural network is PNN algorithm. All three had an accuracy rate of more than 90 percent. But BP neural network is easy to fall into local optimal with unstable performance. On the contrary， PNN neural network has no such limitation， does not require training， and the design process is simple. So PNN algorithm is more suitable for the establishment of drilling fault diagnosis model.

Abstract:Geological core drilling is a complex and comprehensive construction system， where the drilling rig， drilling tower， auxiliary equipment， and tools used in the operation are mostly composed of metal components. The working environment is complex， and there are many uncertain factors that affect safe construction. From the perspectives of standardizing the construction order of rig platforms， improving management levels， reducing production safety accidents， and improving the construction environment， it is of great significance to promote standardized construction of rig platforms. The article focuses on introducing some experience and practices gained by our unit in the standardization construction of rig platforms， focusing on three aspects of construction site standardization， equipment management standardization， and construction management standardization. It analyzes that the construction of standardized rig platforms has advantages such as high safety， good standardization， and easy management. The promotion and implementation in exploration areas such as Zhaishang in Gansu， southern Shaanxi， and Beishan have achieved good results， and provided reference for a more standardized and institutionalized construction in the drilling industry.

Abstract:In this paper， combined the specific practice of the geological drilling projects of the Zhuguang Uranium Mining Area in Guangdong Province， the management of drilling engineering of the Research Institute No.290， CNNC under the new circumstances are studied from six aspects， namely strict standardization and evaluation of drilling equipment， green exploration practices， strict personnel and equipment access control， enhancement of safety inspection methods， emphasis on technological management improvement， and implementation of team culture development. This paper explores how to improve the management level， work quality， and efficiency of drilling projects under new situation