可旋转钻柱定向钻进工具设计及测试

针对滑动定向钻进时摩阻高、机械钻速低的技术难题，设计了一种滑动定向钻进时可旋转钻柱的降阻工具RSD，建立了底部钻具组合扭转动力学模型，分析了RSD扭矩及RSD安放位置对于螺杆钻具工具面角的影响规律。利用可模拟螺杆反扭矩振动的试验装置，进行了RSD原理样机室内测试，并利用测试井进行了RSD原理样机现场测试。理论分析及测试结果表明，RSD工作原理可行、结构设计合理，在钻柱旋转时可以稳定和调节螺杆钻具的工具面角。研究认为，利用RSD既可以实现螺杆钻具滑动定向钻进，又可以旋转RSD以上的钻柱，降低摩阻。 

Design and Test for Rotary Slide Drilling Tool

A friction reduction tool for rotating drill strings during slide drilling, namely the rotary slide drilling (RSD) tool, was developed to address the technical problems of high friction and a low rate of penetration (ROP) in slide drilling. A bottomhole assembly (BHA) torsional dynamic model was built to analyze the effects of the torque and position of the RSD tool on the toolface azimuth of the screwdrill. The prototype RSD tool was tested indoors with a test device that could simulate the antitorsional vibration of the screw. It was also tested in the test wells. The theoretical analysis and test results show that the RSD tool has a feasible working principle and a reasonable structural design, and it can stabilize and adjust the toolface azimuth of the screwdrill while rotating the drill string. Rresearch indicates that the RSD tool can not only realize the slide drilling of the screwdrill but also reduce friction by rotating the part of the drill string above it.