大位移井技术因其具有巨大经济效益并能够满足特殊作业的目的而得以迅速推广应用，但水平井段摩阻扭矩又成为了制约大位移井推广应用的关键因素。
ERD Wells are widely adopted due to its great economic benefits and its applicability for special purposes, while the drag along the horizontal section has limited the promotion of ERD Wells.
在大位移井、大斜度井、水平井和深井钻井中，或者在狗腿严重度较大的井段，或者在技术套管下入后的长裸眼钻井过程中，常常出现套管磨损问题。
For the extended well, high angle drilling, horizontal drilling and deep well drilling, or in the well section of large dogleg severity, or the long open hole, casing wear often happens.
目前，智能完井技术在国外已经应用到水平井、大位移井、分枝井、边远井和水下采油树井及多层采油井和注水井。
Nowadays, smart well technique has been applied to horizontal well, offset well, multi-lateral well, remote area and subsea operation and also to production well and injection well.
井眼轨道设计是大位移井的关键技术之一。
Well trajectory design is one of the key techniques for successfully drilling an extended reach well.
大位移井完井技术是关系到大位移井成功与否的关键，而套管的顺利下入是该技术的难点之一。
Well completion technique is key to successfully drill extended reach well a nd casing running is one of difficulty.
钻成大位移井必须依靠井眼轨迹控制技术，研制的井下闭环可变径稳定器是实现该项技术的关键。
It is necessary to depend on the control technology of borehole trajectory to drill the extended-reach well successfully. A closed-loop adjustable stabilizer at downhole is developed.
井下闭环钻井技术是近年来在国内外得到普遍重视的新技术，是大位移井钻井必不可少的技术。
The downhole closed-loop drilling technology is a new developing technology. It is indispensable to the success of extended reach well.
井下闭环钻井技术是近年来在国内外得到普遍重视的新技术，是大位移井钻井必不可少的技术。
The downhole closed-loop drilling technology is a new developing technology. It is indispensable to the success of extended reach well.
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