Abstract:Analysis on interior fluid field of the air-driving reverse circulation bit was based on the experiment for a long time. With the development of the computer, amount of the numerical simulation and emulation software brought more advantages than the experiments. However, due to the complexity of the interior fluid field, few people could make resolution calculation for it. In this article, by simplifying the interior fluid field character of air reverse circulation bit, the air dynamics and fluid mechanics was used to calculate the air distribution in the bit; and the flow distribution equations were obtained. It can be shown that the simultaneous equations have a unique resolution. The article will provide the help to effectively make certain that the parameters of the bit structure and deeply study the interior fluid field character of air reverse circulation bit.

Abstract:A lot of foam will be produced during the foam-drilling works. If they do not be eliminated in time, large amount of foam will accumulate in the construction site and affect the normal production. So it is important to select proper defoaming method during the foam-drilling period. In this paper, aperture defoamer is introduced, which belongs to the mechanical method and tests are set up on test-bed indoor with defoaming rate of 86%.

Abstract:Based on the investigation on homemade spindle core drilling machine, designing plan was put forward to dual-use drilling tower for vertical and inclined holes, which changed the history that homemade spindle core drilling machine could not be used in inclined hole construction, further developed application range of homemade spindle core drilling machine. The paper introduced the drilling machine about design principle, structure design and effect of production test.

Abstract:通过对XY-44、XY-5、YDX-3、LF-90型钻机在新疆黄山铜镍矿的钻探效果、劳动强度、安全保障、设计理念等几方面的分析比较，说明全液压动力头钻机具有钻探效率高、钻孔质量好等优点

Abstract:The paper outlines and summarizes the initial application process and effect of the HRC drilling and the experience for placer mineral prospecting in Hainan of China. The successful application of HRC supplies a new and high efficient technology for coring (sampling) drilling in marine geological survey in China and foreign countries.

Abstract:There are about 22 million tons reserves of iron manganese ore body in a mining area in Hunan. According to the complicated hydrogeology and engineering geology conditions, a method of drilling air-lifting reverse circulation was put forward and single well test was made with satisfied result received. The paper introduced the mining process and production test with the field case.

Abstract:总结了华北平原区第三系地热井结构中泵室管底部的3种密封形式：重叠挤水泥密封，异径连接密封，悬挂连接密封，并对这3种密封形式的实用效果进行了对比分析。

Abstract:简要介绍了在河北南孟施工的深3340 m地热井的地质情况，详细说明了该井的施工工艺，总结了该井的施工经验以及施工中存在的问题。

Abstract:针对蔡家营锌金矿区钻探施工中存在的钻孔弯曲度超差严重的问题，选用φ75 mm绳索取心金刚石钻进方法，并采取相应的钻头、冲洗液技术措施，取得了良好的钻探效果。

Abstract:介绍了SYZX75型绳索取心液动锤在福建武平银多金属矿的坚硬致密“打滑"地层进行试验的情况。结果表明，绳索取心液动锤钻进方法的采用，使机械钻速、回次长度和台月效率得到了成倍的增长。

Abstract:麻黄山区块位于鄂尔多斯盆地西缘，由于构造复杂，断层发育，地层变化大，存在较为严重的井斜、井漏复杂情况，影响工程施工进度，进而延缓整个地区的勘探开发速度，如何控制井斜和防止井漏成为目前该区块钻井施工过程中的突出问题。通过对该区块地层特点、施工井的分析总结，对该区域内钻井施工进行探讨，提出了控制井斜、井漏，提高钻井效率的工艺措施，对加快麻黄山区块石油勘探开发起到一定的推进作用。

Abstract:欠平衡钻井技术是准确发现和评价油气资源的方法之一，尤其适合评价和开发低压低渗油气层。介绍了梨深1井四开井段实施欠平衡钻井技术的详细情况。该井四开钻井液密度0.90～1.05 g/cm3,使钻井液液柱压力低于地层压力，地层大量气体侵入井筒，进一步增大井底欠压差。自井深3582.5 m后一直维持点火钻进，为后续井钻井施工提供了很好的借鉴。

Abstract:ND5-12井是麻黄山工区施工的一口开发井，井漏十分频繁，严重制约了该地区的钻井速度，井漏问题是该地区施工必须逾越的难关。概述了该井井漏情况；分析了井漏原因及堵漏难点；制定了堵漏方案；详细介绍了堵漏泥浆的配方、性能以及堵漏技术措施。

Abstract:DF2井运用国内最先进的分支水平井技术，在施工的过程中遇到了多种复杂问题：如大井眼的防斜及钻具失效、钻遇煤层时的防塌、φ244.5 mm套管的下入及固井问题、导眼施工中的携岩问题等，给钻井施工带来了相当大的难度。针对预计的施工难点，提出了具体的解决方案，如塔式钻具的应用、φ244.5 mm套管漂浮技术、水平段钻具组合的优化等，取得良好效果。

Abstract:针对大牛地气田DF2水平分支井二开φ244.5 mm技术套管下入的难点，在对下管摩阻力进行认真分析的基础上，制定了有针对性的下管技术方案，实践证明方案是可行的。详细介绍了井眼准备、套管准备、下入方案以及下套管技术措施等。

Abstract:针对DF2井钻井液维护技术重点及难点，在该井A点前使用天然高分子双保钻井液体系，使用过程中该钻井液体系具备良好的流变特性、携带、悬浮岩屑的能力和润滑性能，满足了该井一开、二开钻井施工和地质录井的需求。在下套管过程中井眼稳定，顺利下到3109.01 m无阻卡显示。

Abstract:In this paper, analysis was made on geological properties and artificial factors of silt and sand liquefaction in Wuhan City, and then the typical engineering section was chosen to conduct the liquefaction estimation and liquefaction index calculation. Lastly, conclusions were made on the hazard level of vibration and liquefaction and the main extents that need treatment. These information can be taken as reference for the engineering environment evaluation, quakeproof design and foundation construct and design.

Abstract:通过分析河北廊坊地区的地质条件和建筑情况，以及多个工程的实际应用情况，认为CFG桩复合地基比较适合于河北廊坊地区应用。同时分析了应用中存在的一些问题，并提出了预防措施。

Abstract:结合杭州钱江新城某广场基桩工程，在分析高砂性地层自然造浆性的基础上，介绍了高砂性地层中钻孔灌注桩施工易发的基桩质量隐患，并分析了其产生原因。

Abstract:介绍了复合土钉墙技术在青岛福林大厦基坑设计、施工中的应用，分析了复合土钉作用机理，对复合土钉墙的设计、施工工艺进行了较详细的阐述。

Abstract:通过对石家庄市水源街道路病害机理的分析，找出了导致该路段发生病害的根本原因，根据实际情况选择了劈裂注浆加固路基的处理措施，获得了很好的效果。并对施工过程中的一些问题进行了初步探讨。

Abstract:结合山东金岭铁矿深204.50 m、直径800 mm投料孔工程的施工，介绍了在硬岩地层先施工前导孔再用组装钻头扩孔的大口径深孔施工工艺。

Abstract:In this paper, the general situation and difficulties of the Tiantang River crossing project are introduced firstly; then Watering Balance Method WBM is put forward with theoretical analysis on it; finally, the construction process and results of the whole project are introduced and analyzed. The construction practice proves the theoretical analysis is correct and reveals that during the construction process, buoyancy force can be balanced by injecting water into the pipeline to decrease its friction and pulling force.

Abstract:结合百富高速公路者桑隧道因滑坡而引起的隧道塌方灾害治理工程，详细介绍了采用地表钻孔注浆治理隧道塌方的施工技术。

Abstract:Detailed risk analysis was fully made on slurry shield tunneling construction in river bottom and sea bottom in China, construction risk to constructors, engineering quality and engineering structure were reminded and evaluated. According to the field case, severity of tunneling construction accident was clarified, which has instructive significance to control tunneling construction risk.

Abstract:光面爆破在隧道开挖中运用广泛，该爆破控制技术在景鹰高速公路桃墅岭隧道洞身开挖中达到比较理想的效果，洞室成形较好。介绍了该工程中的光面爆破参数、爆破控制技术。