井眼轨道控制技术发展综述

A review of development of wellpath control technique

为研究井身质量对水平井和大位移井的横向位移及深井井眼深度的限制，引入了井眼可达性概念，即安全钻井条件下的水平井和大位移井可能达到的横向位移及深井可能达到的井深。说明了提高可达性的关键技术是发展井眼轨道控制技术。应用目标树分析法确定了系统组成部分及其相互关系，指出发展井眼轨道控制技术必须首先发展井眼轨道控制工具；大力发展井眼轨道控制工具是提高我国钻井技术水平的重要途径。

In order to study the limits of wellbore quality on the departure of horizontal holes and extended reach holes and thedepth of deep holes, the conception of well reachability, which is defined as the maximum departure of directional holesand the maximum depth of deeP holes under safe drilling conditions, is introduced in this article. It is indicated that thekey techniqUe for improving well reachabililty lies in raising the technical level of wellpath control system. nle components of the system and their relations are determined by means of the objective tree analysis. It is declared that the firstthing to develop wellpath control technique is fo develop relevant downhole toos.