用井下闭环可变径稳定器控制大位移井的井眼轨迹方法研究

摘要

The close-loop downhole adjustable stabilizer is the answer to the questions presented in extended-reach wells nowadays,such as how to exert WOB effectively,overcome friction,borehole purification,enhance the rate of penetration and extend the displacement,etc.The structure and principle of the downhole close-loop adjustable stabilizer is introduced in this paper.It also lays emphasis on the method of borehole trajectory control.Meanwhile,this paper presents an effective solution for extended-reach well drilling,especially for offshore drilling,enhance rate of penetration and reduce drilling costs.%简要地介绍了可变径稳定器的结构及工作原理，在对带有可变经稳定器的钻具组合进行力学分析的基础上，着重论述了控制井眼轨迹的方法。该工具为解决我国大位移井、特别是滩海油气勘探、提高钻井机械钻速、降低钻井成本提供了一条有效的途径。