液力转向器研制与应用

针对连续管管柱不能转动的固有特性,根据定向钻井的技术要求,通过在地面启停泥浆泵的方式,利用液力转向器驱动井下定向钻具组合进行转动,从而调整定向钻具的工具面,实现连续管定向钻井。连续管液力转向器可单次转动角度45°,额定输出转矩700～945 N·m。试验表明,外径95 mm的连续管液力转向器完全满足121 mm井眼连续管定向钻井的技术要求,实现了连续管定向钻井。

Development and Application of Hydraulic Orienting Tool for Coiled Tubing

An orienting tool to deal with problem that coiled tubing cannot be rotated downhole is presented in this paper, whilst tubing string rotation are needed in directional drilling operation. The orienting tool has a hydraulic steering gear, which drives the downhole directional drilling assembly to rotate by starting and stopping the mud pump on the ground, so that the tool face of the directional drilling tool can be adjusted and directional drilling by coiled tubing can be realized. The hydraulic steering gear on coiled tubing can be rotated 45° in a single move and the rated output torque is 700 ～ 945 N·m. Test result showed that the hydraulic steering gear with outer diameter of 95 mm fully meets the technical requirements of directional drilling of 121 mm borehole and realizes coiled tubing directional drilling.