“四合一”钻具在定向钻井工程中的应用分析

Application analysis of the “four in one” drilling tools in directional drilling engineering

摘要:

“四合一”钻具是一种把钻头、螺杆、短钻铤和稳定器四种钻具按照固定顺序组合起来的定向钻具，具有双稳定器刚性结构，同时利用单弯螺杆的特性，既可以实现直井段的防斜打直，又可以在造斜段进行滑动定向钻进，还可以在稳斜段、增斜段、降斜段进行复合钻进。本文针对不同“四合一”钻具组合对井眼轨迹控制产生不同影响的问题，结合桃7-15-17X1天然气开发定向井钻井工程施工案例，探讨了该钻具组合影响井眼轨迹控制的关键因素，分析了不同钻具组合参数影响井眼轨迹控制的主要原因，对促进定向井井眼轨迹控制技术发展、提高定向井钻井施工效率具有重要意义。

Abstract:

The “four in one” drilling tool is a directional drilling tool that combines the drill bit， screw， short drill collar， and stabilizer in a fixed order. It has a double stabilizer rigid structure. By utilizing the characteristics of a single bending screw， it is possible to achieve anti deviation straightening in the straight section， sliding directional drilling in the inclined section， and composite drilling in the stable， increased， and lowered sections. This article focuses on the different effects of different “four in one” drilling tool combinations on wellbore trajectory control. Combining with the construction case of Tao7-15-17X1 natural gas development directional well drilling project， the key factors affecting wellbore trajectory control by this drilling tool combination are discussed. The main reasons why different drilling tool combination parameters affect wellbore trajectory control are analyzed， which is of great significance for promoting the development of directional well trajectory control technology and improving the efficiency of directional well drilling construction.