CTR120/300复合连续油管钻机研制与试验

连续油管钻井技术是20世纪90年代从北美地区迅速发展起来的一项高效、低成本、安全环保的钻井技术。四川宏华石油设备有限公司成功研发了国内首台复合连续油管钻机，名义钻井深度（Φ114.3 mm钻杆）2 000 m。钻机的主要设备由移动运输性好的3台拖挂单元组成：连续油管井架底座拖挂单元、连续油管滚筒拖挂单元和机械手拖挂单元。该钻机将连续油管装置和带动力水龙头的常规钻井装置集成在一起，既能进行常规钻杆钻井，又能进行连续油管钻井。钻机配备的全套自动化管子处理装置、轻便铁钻工、自动液压卡瓦等机具，极大地减少了钻台面的作业量，降低了劳动强度。钻井试验结果表明，CTR 120/300复合连续油管钻机总体性能符合设计要求，与常规钻井相比具有起下钻速度快、机械钻速高、钻井液连续循环等优点，但还需要进一步加强井下工具和钻井工艺的研究，以加快其在国内的推广应用和发展

Research & development of CTR120/300 hybrid coiled tubing rig and its experimental studies

Since its first use in North America in the 1900s, the Coiled Tubing Drilling (CTD) has been developing rapidly as an efficient, low cost and environmentally friendly technology. The first hybrid coiled tubing rig in China was researched and developed successfully by Sichuan Honghua Petroleum Equipment CO., LTD, and its designed drilling depth is up to 2000 m by use of theΦ114.3 mm drill pipe. The main equipment of the rig is mounted on three trailers with strong mobility, i.e., substructure trailer, reel trailer and pipe handling trailer. This hybrid coiled tubing rig is integrated with a coiled tubing device and the conventional drilling device equipped with a power swivel, so it can drill either with conventional drill pipes or coiled tubing. Both workload and work intensity of operators will be significantly cut down by use of such tools as automatic pipe handling system, portable iron roughneck, automatic hydraulic slip, etc. The experiment shows that the overall performance of CTR120/300 hybrid CTR satisfies the requirement of design. Compared with the traditional drilling, CTD has the advantages of fast tripping, a high rate of penetration, and continuous circulation of drilling fluid. However, further studies on downhole tools and drilling techniques are required for faster development and wider application of CTD technology in China.