石油钻采工艺Issue(2)：1-5,5.
微小井眼连续油管钻井牵引器系统结构设计
Structure design of micro-hole coiled tubing sliding drilling tractor system
摘要
Abstract
Micro-hole coiled tubing(CT)sliding drilling can improve development benefit and cost cutting for the maturing field, shale gas, coal seam gas, tight gas and other unconventional gas reservoirs. It can reduce reservoir pollution, protect the environment and have a wide application prospects in China. However its wellbore diameter is very small, the CT drill string cannot revolute in the tiny wellbore, friction resistance of CT sliding drilling is so seriously that it is difficulty to run back into the well. The drilling weight can't apply and even happen to sticking accidents. This has directly influenced the application and popularization of micro-hole CT sliding drilling technology. According to the present research situation of tractor at home and abroad, a kind of micro-hole CT sliding drilling tractor by electronic controlled hydraulic drive is designed. The tractor mainly includes a top slips support and traction system, a central sliding tube assembly, a control system and a bottom slip support system. The drilling fluid hydraulic energy drives its tractor by elec-tronic control. The tractor is suitable for micro-hole underground work with good flexibility, good stability and strong flexible bending ability. The tractor can provide normal drilling fluid circulation, can realize two-way traction and power-off protection and make a trip for CT string. The difficult technical problems of CT sliding resistance will be solved for tripping CT string well by the tractor, which will promote the micro-hole CT sliding drilling technology development.关键词
微小井眼/连续油管钻井/牵引器/电控/液压驱动/非常规气藏Key words
micro-hole/coiled tubing(CT)drilling/tractor/electronic control/hydraulic drive/unconventional gas reservoirs分类
能源科技引用本文复制引用
侯学军,高德利,沈忠厚..微小井眼连续油管钻井牵引器系统结构设计[J].石油钻采工艺,2013,(2):1-5,5.基金项目
国家科技重大专项课题“复杂结构井优化设计与控制关键技术”(编号:2011ZX05009-005) （编号:2011ZX05009-005）
国家自然科学基金创新研究群体项目“复杂油气井钻井与完井基础研究”(批准号:51221003) （批准号:51221003）
重庆市基础与前沿研究计划一般项目“页岩气微小井眼钻井连续油管遇阻牵引控制系统研究” （）
重庆科技学院校内基金“页岩气微小井眼钻井连续油管遇阻机理及牵引控制研究” （）
