Aiming at the problems of large load of rotation drive system of rig,low efficiency of torque transmission and high cost for operation and maintenance in the horizontal well liner steering drilling technology,a new method of liner differential rotation drilling with double tubular strings in the horizontal well is proposed.The technical principle of this method is revealed,supporting tools such as the differential rotation transducer,compound rotary steering system and the hanger are designed,and technological process is optimized.A tool face control technique of steering drilling assembly is proposed and the calculation model of extension limit of liner differential rotary drilling with double tubular strings in horizontal well is established.These results show that the liner differential rotary drilling with double tubular strings is equipped with measurement while drilling(MWD)and positive displacement motor(PDM),and directional drilling of horizontal well is realized by adjusting rotary speed of drill pipe to control the tool face of PDM.Based on the engineering case of deep coalbed methane horizontal well in the eastern margin of Ordos Basin,the extension limit of horizontal drilling with double tubular strings is calculated.Compared with the conventional liner drilling method,the liner differential rotary drilling with double tubular strings increases the extension limit value of horizontal well significantly.The research findings provide useful reference for the integrated design and control of liner completion and drilling of horizontal wells.
关键词
水平井/尾管完井与钻井/双管柱/尾管差速旋转钻进/工具面控制/水平延伸极限
Key words
horizontal well/liner completion and drilling/double tubular strings/liner differential rotation drilling/tool face control/horizontal extension limit
维普
万方数据