大位移井钻井过程中摩阻扭矩的预测和控制是成功地钻成大位移井的关键因素之一。
Predicting and controlling the drag and torque in the process ofd rilling extended reach Wells is one of the key factors to ensure to be successful in the drilling.
井眼轨迹控制是大斜度井的关键技术之一，其结果直接影响该井摩阻扭矩的大小、全井的安全及施工的顺利等。
Well trajectory control is one of the key technologies of high-angle well well drilling, and the results of the control directly affect the well friction, torque, safety and construction of all Wells.
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.
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