Abstract:This paper outlines the progress of the gas hydrate survey research abroad, and introduces the history, working process and some progress of the gas hydrate survey in China. And some drilling and sampling tools, drilling technologies, application status and drilling achievement for the gas hydrate in the permafrost are introduced in details and the task of the exploration and development and some opinions of the gas hydrate in the permafrost in the future are presented in the paper.

Abstract:For recent years gas hydrate has discovered in northern part of Southern ocean and in frozen zone of southern fringe of Qilian mountain, in Qinghai province, Tianjun county in China .This new energy source will play an important role for adjusting energy resources structure and relaxing the energy resources tension of China. But, the exploitation of the gas hydrate and its security are serious problem in the World. The Teaching group of geophysics, exploration engineering and oil drilling engineering of South Russian State Technical University has developed a technology and methodology system of safety controlling and measuring. With the system the position of CT perforation part and the blocking up of the part can be determined and what corresponding measures to solve the blocking up should be taken. Therefore the system provides a technical support for safety exploration of gas hydrate.

Abstract:The paper introduced the development situation and the newest progress of coal bed underground gasification in China and abroad， illustrated the advantages of underground coal gasification and the tough course of technology development. Underground coal gasification (UCG) is an important way to issue a series of technical and environmental problems in the traditional method of coal mining. The introduction was made on the improvement results of nonwell type underground coal gasification in ENN Group and the prospect of underground gasification coal mining was forecasted.

Abstract:As a renewable energy resource, hot dry rock (HDR) has advantages of strong heat energy, wide distribution, environmental protection and not being affected by natural conditions, such as seasons. Hot dry rock exploration development and utilization is basically a blank field in China, the study on this key technique has a very realistic significance. Based on the introduction on the current situation of hot dry rock exploration development and utilization both in China and abroad, the paper analyzed the key technology and put forward the main study target and work to be required.

Abstract:Gas hydrate can exist in certain temperature and pressure conditions as solid form, but because of its special thermal physical and mechanical properties, it is impossible to be developed with "mining" type like other solid mineral resources. Under the present condition, drilling technology is the key for the exploitation of gas hydrate; it is economically feasible and can avoid the environmental problems that might be brought by mining. Based on the situation that gas hydrate was converted to the controlled resource underground before mining, mining mode combining chemical grout injection with depression was proposed.

Abstract:With the era of high oil prices in world oil market, the high cost of oil shale production has become economical. Oil shale has become a very important alternative energy source. Due to many constraints, the cost of conventional mining methods for oil shale are higher. Based on the burial conditions as well as physical and mechanical properties of oil shale, at the same time, analyzed the unconventional mining methods and related tests for oil shale mining at home and abroad, two mining models are proposed, which are in situ mining and bore-hole hydraulic minting technology.

Abstract:Ground source heat pump (GSHP) technology was used in China not long, but the application speed is very fast, almost at an annual rate of over 20% growth, especially applied in the Expo 2010 Shanghai in large scale, to obtain good energy saving effect. With the application of the technology and in-depth research, China has mastered the full range of GSHP technology, and in the technical regulations for shallow geothermal energy investigation and evaluation, bore thermal response testing techniques, efficient underground heat exchange wells, and joint application of solar and GSHP technology have made new progress, these achievements will be the realization of China's energy-saving emission reduction targets by 2050 to provide technical support.

Abstract:The paper analyzed and evaluated the current situation of development and utilization of geothermal resources and the existing problems in Henan Province. Suggestion and study direction were put forward for geothermal energy resources exploration management and technology in low-carbon social and economic conditions.

Abstract:As one of the important energy-saving methods in heat and cool supplying, the parameter design for the water-source heat pump well is based on the specific hydrological, climatic, meteorological and geological conditions. Based on the analysis and introduction on the design parameters, construction technological process, well completion quality control, water pumping & injection and seepage test, quaternary large diameter water-source heat pump well was designed with heat and cool central air-conditioning technology supplied by water-source heat pump. As the heat and cool supplying water-source, various technical indexes reached the requirement.

Abstract:Geothermal resources are clean substitute renewable resource with great developing prospect and potential, the study on the distribution, formation, reserves, migration mechanism, mining pattern and the influence on ecological environment has great significance. By the analysis on the distribution, study and the current situation of development and utilization, primary discussion was made on the issues in geothermal resources development and relative suggestions were put forward.

Abstract:This paper introduces the machinery and equipment for geothermal well construction, and describes the stratification drilling measures: 3-section and 2-cementing for well completion, drilling tool matching, mud property, well cementing and pumping test. It was unfavorable for further development and utilization with wellhead water temperature of 63.5 ℃ and flowing yield only 421.9 m3/d. Another directional well was planed to construct 700 m away from the original well; and the design scheme was put forward.

Abstract:In the construction of geothermal well in neogene in Hebei plain, gravel-filling technology was adopted with the advantages of sand control and borehole wall stability. Based on the practice, the paper put forward the gradation scheme for pipe diameters, summed up the mud replacement technology and analyzed the calculation method for gravel-filling quantity, principle of gravel-filling speed and the feasibility of static water gravel-filling.

Abstract:Trenchless technology is recognized as an environmentally sound technology (EST) for underground services by United Nations Environment Programme (UNEP). In this paper, the author firstly outlines the various technology methods and the advantages of trenchless construction; then introduces in detail the 3 development stages of trenchless technology in China, the current status and the main problems; lastly analyses the market potential for this new technology.

Abstract:Due to the complex stratum and drilling fluid pressure, ground movement often occurs during the process of horizontal directional drilling. A project in Mesa of America is introduced in this paper. The ground movement numerical simulation work is based on FLAC3D under different drilling fluid pressure from 0 MPa to 0.9 MPa. The results show that the max distance of z axis is 26 mm. Combined the DCRP technology and leveling method, the author fond that the max distance of z axis are 28 mm for DCRP and 30 mm for leveling method. These results are very near to the simulation results. During the field measurement, 26 targets were fixed on the ground surface. The max difference between DCRP and leveling is 2.7 mm which shows that the accurate is nearly the same. As a noncontact measurement, the DCRP technology is not limited by the field cases and the staff level as leveling method.

Abstract:Horizontal water well is effective for shallow low permeable aquifer groundwater extraction. The construction procedures include well drilling, bore hole reaming, well forming, gravel packing and well development. The technical issue of horizontal directional drilling technology is discussed in the paper, pre-packed well screen was developed and proper drilling method for horizontal well construction was proposed. It provides a new way for shallow low permeable aquifer groundwater extraction.

Abstract:The structure, intrinsic performance of matrix, sintering process and hydraulic flow were studied for high efficiency and low energy consumption of diamond bit, tests were made on bits of different structures with good technical economic effect.

Abstract:There is an essential difference in the working mechanism between hydraulic rock drilling impactor and hydro-hammer; with very high working efficiency and energy conversion ratio, the rock-drilling velocity of hydraulic rock drilling impactor is much higher than pneumatic DTH hammer but not suitable for mud driving. While the flow distribution mode of revolving valve hydraulic impactor is different to the previous flow distribution modes, and perhaps more suitable for mud medium driving.

Abstract:Gas pumping-exhaust well is applied more and more widely in coalmine safety production in recent years, but its construction period is long with difficulty. Take the example of serious collapsing accident, analysis was made on the case stress; based on the analysis, the checking calculation method for tri-axial stress of large diameter case was discussed in detail. By the comparative analysis, the tri-axial stress calculation results are more accurate than the ones by traditional uniaxial stress calculation method.

Abstract:Oil-gas well drilling shoulders national mission and very important social responsibility with energy-saving potential. The scientific development of an enterprise should emphasize energy saving and emission reducing to transform the mode of economic development. Only in ways of low carbon production; saving, clean and safe development, can the enterprise realize to develop quickly and well.

Abstract:The long spiral rotary jetting and mixing is a new technology, by which the pile is constructed with mechanical mixing soil under high-pressure jetting by the modified long-spiral drill. The rotary speed of the long-spiral drilling is slow, but the lifting speed is quick. The soil can’t be cut fully by the high-pressure cement, which causes the low pile body uniformity, low strength and poor water-stop effect. While the converter is used in the long-spiral drilling, the lifting and falling speed can be adjusted in need of construction for fully mixing, better pile body condition and better water-stop effect. At the same time, the movable block is saved; the appliance becomes more simple and convenient with smaller generator power and drilling current for energy saving.

Abstract:The rigid-like and large diameter cement-soil mixing pile is a new pile type in cement-soil mixing pile series; its unique scientific and technological achievements have won the praise of many engineering experts and it was popularized and applied in the Pearl River Delta region with most significant outcome of sustainable development of low-carbon goal: low consumption, low noise and no pollution construction. By the examples of pile type and combining with the geological features of the Pearl River Delta region, the paper introduced that in the pile-site, the pile core-pulling strength of 95% Φ1000~1200 mm cement mixing piles reached to qu (28d)≥1.5~2.0 MPa in water content of 70%~ 80% (due to consolidation) of sludge formation, and Φ1000 cementsoil mixing pile penetrated through N≥38 hit rough (gravel) sand formation.

Abstract:In accordance with the monitoring requirements, direct pushing technology can get groundwater, soil and gas samples rapidly and accurately. After sampling, it can be installed with well pipe and screen, using as a permanent monitoring well. The technology can provide analysis of samples to identify the potential contaminated sites. With the advantages of low cost and high efficiency, this technology can provide a scientific basis for management of groundwater and soil pollution. Some technical understanding was discussed in the paper.