连续软管钻井技术

随着连续软管（CT）技术和钻井技术的发展，近年来连续软管钻井（CTD）已成为国外钻井技术的热点，连续软管的用途越来越广泛。在概述连续软管发展史的基础上，叙述了连续软管钻井的优缺点、连惯软管钻机系统、次平衡连续软管钻井及连续软管过油管侧钻技术，介绍了国外石油公司利用连续软管钻井的先进经验，混合型连续软管钻机系统优于常规钻机系统。连续软管钻井是进行欠平衡钻井的一种最好方法。目前连续软管主要用于老井重钻中的水泥塞开窗侧钻作业。我国应加强这方面的研究和试验工作。

Coiled tubing drilling technology

Along with the development of coiled tubing (CT) technique and drilling technique, coiled tubing drilling (CTD) has become an important technique of foreign drilling technique in resent years. Usage of is wider and wider. On the basis of developing history of CT, the paper describes the advantages and disadvantages of CTD,CT drilling rig system, underbalanced CTD and through tubing sidetracking technique of CT. Meanwhile, the advanced experiences of using CTD abroad are presented. Mixed CT drilling rig system is preferable to regular drilling system. CTD is a best method for underbalanced drilling. At present, CT is used mainly for re- entry sidetracking operation.