小动力旋挖钻机用嵌岩短螺旋钻头结构形式的改进

采用小动力无加压旋挖钻机在粒径较大的卵砾石地层和泥页岩地层中进行1500 mm以上大口径钻孔灌注桩施工，由于钻机动力小且不能加压，用常规嵌岩短螺旋钻头钻进出现进尺慢或不进尺现象。通过对河南西峡县宛西制药责任有限公司新厂房桩孔施工过程中出现此种现象的分析和处理，提出了嵌岩短螺旋钻头针对性的改进措施，并取得了良好效果。     

新型充气钻井液在新疆严重漏失地层的应用

利用特殊植物纤维KWS作为泥浆处理剂的新型充气钻井液，不仅具有常规充气钻井液低密度、排粉能力强、节约用水等优点，还可以不受钠、钙离子的影响，提高钻井泡沫稳定性和钻井液抗盐能力。通过采用此种新型充气钻井液，利用其低密度特性、特殊泥饼、泡沫的群体封堵作用和泡沫的疏水屏蔽作用，成功解决了裂隙地层的漏失问题，恢复了钻探生产。在我国西部干旱缺水漏失地区具有良好的应用前景。     

液体高膨胀材料充填堵漏试验应用

介绍了钻探施工中，利用膨胀材料充填、堵漏的新工艺，其具有经济、高效、安全的特点。     

鄂北工区钻头型号及钻井参数的优化

通过对近年来鄂北工区所施工井的钻井资料进行分析、对比，优选出了适合于各区块、各井段的钻头型号和钻井参数，提高了机械钻速，缩短了钻井周期，使鄂北工区的钻井技术上了一个新的台阶，加速了鄂北气田的建设。     

Numerical simulation of percussive drilling

This paper presents a novel dynamical model to analyze the long‐term response of a percussive drilling system. This departs from existing approaches that usually consider a single activation and bit/rock interaction cycle for the analysis of the process performance. The proposed model integrates the axial dynamics of an elastic piston and an elastic drill bit, a motion‐dependent pressure law to drive the piston, and a generalized bit/rock interaction law representative of the dynamic indentation taking place at the bit/rock interface. It applies to down‐the‐hole percussive drilling as well as top‐hole, with minor modifications. The model does not account for the angular motion or the hole cleaning, however. The model is first formulated mathematically; then, a finite‐dimensional approximation is proposed for computations. Numerical analyses of the model response, for a low‐size down‐the‐hole percussive system, follow. The period‐1 stationary response for the reference configuration is studied in detail, and parametric analyses assessing the influence on the rate of penetration of the bit/rock interaction parameters, the feed force, and the percussive activation parameters are conducted. These analyses reveal that the multiscale nature of the process is well captured by the model and recover expected trends for the influence of the parameters. They also suggest that a significant increase of the penetration rate can be achieved by increasing the percussive frequency. Copyright © 2015 John Wiley & Sons, Ltd.     

EXPLORATION ENGINEERING

正20141864 Deng Mengchun(Institute of Exploration Technology,CAGS,Chengdu 611734,China);Huang Shenghui Rock Sample Collection and Division Technologies for Air Reverse Circulation Sampling Drilling(Exploration Engineering,ISSN1672-7428,CN11-5063/TD,40(7),2013,p.73-76,80,16 illus.,5 refs.)     

松辽盆地大陆科钻二开段大井眼钻井液技术

CCSD-SK2井是一口钻穿松辽盆地白垩纪陆相沉积地层的中国大陆科学钻探井。二开段先以216mm口径钻至2806.20m,然后进行444.5mm口径扩孔。泥页岩地层大井眼钻进过程中粘土矿物含量高且易造浆,砂砾岩层渗透性强易粘卡,井壁稳定控制与钻屑携带难度大。选用了钾铵聚合物钻井液体系和聚磺钻井液体系,通过正交实验确定了钻井液配方。将钻井液控制在合适的密度、较低的失水量以及较强的封堵性,有效实现了井壁稳定;保持适当的环空返速、较高的动塑比以及定期打稠塞举砂等措施,有效实现了井眼净化。1086.45m~1147.56m与1182.74m~1256.01m井段累计收获岩心130.90m,取心率达到97.41%,平均机械钻速为0.84m/h;最终顺利钻至2806.20m。     

Research on Formation Mechanisms of Hot Dry Rock Resources in China

As an important geothermal resource, hot dry rock(HDR) reserves have been studied in many countries. HDR resources in China have huge capacity and have become one of the most important resources for the potential replacement of fossil fuels. However, HDR resources are difficult to develop and utilise. Technologies for use with HDR, such as high–temperature drilling, reservoir characterisation, reservoir fracturing, microseismic monitoring and high–temperature power stations, originate from the field of oil and drilling. Addressing how to take advantage of these developed technologies is a key factor in the development of HDR reserves. Based on the thermal crustal structure in China, HDR resources can be divided into four types: high radioactive heat production, sedimentary basin, modern volcano and the inner–plate active tectonic belt. The prospective regions of HDR resources are located in South Tibet, West Yunnan, the southeast coast of China, Bohai Rim, Songliao Basin and Guanzhong Basin. The related essential technologies are relatively mature, and the prospect of HDR power generation is promising. Therefore, analysing the formation mechanisms of HDR resources and promoting the transformation of technological achievements, large–scale development and the utilisation of HDR resources can be achieved in China.     

庐枞LZSD-1孔科学钻孔钻头选择与使用

受中国地质科学院地质研究所的委托,安徽省地质矿产勘查局313地质队承担《华东庐枞盆地科学钻探选址预研究》3000m科学钻探工程任务,该钻孔为大陆科学钻探选址预研究项目中6个钻孔之一,主要目的是通过钻探揭示和验证与成矿有关的岩体、基底、盖层的空间分布,建立地壳结构模型和异常解释的标尺,为大陆万米钻探提供选址依据。本文主要介绍了在施工过程中的钻头选用情况,仅供同行参考。     

日照市河谷平原区成井方法对比研究

在分析日照河谷平原区水文地质条件的基础上,通过大量抽水试验数据,对比分析研究了当地民井与本次施工水井成井方法的差异,指出了当地民井在成井方法上的不足和缺陷,并提出了适宜该区的成井方法建议。