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摘要: 河南省地勘队伍自2003年开展煤层气钻井施工以来,积极开展技术创新研究,先后研发了大直径绳索取心机具、射流式扩孔掏穴器等专用器具,率先开展了煤层气参数井、水平井、采动井、穿采空井等施工技术研究和实践,形成了涵盖各类煤层气井型的钻井施工技术体系,积累了丰富的实战经验,促进了我国煤层气产业的发展。本文在总结了河南地勘单位在煤层气钻井技术方面取得的成果的基础上,结合国内煤层气开发深度逐渐增加、采空区覆盖面积逐渐增大、构造煤煤层气未实现突破等行业发展需求,提出了开展高效煤层气水平井钻井技术、气动定向钻井技术及构造煤开发钻井关键技术等方面研究的建议。Abstract: Since the coalbed methane(CBM) drilling construction was carried out in 2003, the geological prospecting team of Henan province has actively carried out technological innovation research, and developed special equipment such as large diameter wireline coring equipment and jet hole-expanding tunneling device. The construction technology research and practice of CBM parameter wells, horizontal wells, mining wells and cross-mining wells have been carried out, and the drilling construction technology system covering all types of CBM wells has been formed, which has accumulated rich practical experience and promoted the development of CBM industry in China. On the basis of summarizing the achievements of Henan geological exploration units in CBM drilling technology, this paper puts forward some suggestions for technical research on horizontal well drilling technology of high-efficiency CBM, pneumatic directional drilling technology and key technologies of tectonic coal development and drilling in combination with the development needs of domestic industries such as the gradual increase of CBM development depth, the gradual increase of goaf covered area and the failure to achieve breakthrough in tectonic coal CBM.
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