撞击式静液压油管桥塞的研制与应用∗

摘要

Sliding block tubing plug in snubbing operation usually presents wear and failure of self⁃sealing seal cup in the tubing string, a percussive hydrostatic tubing bridge plug has been developed. The tubing bridge plug integrates single⁃stage two⁃way wedge slips and large adjustable compression seal rubber barrel with anti⁃pro⁃jection protection. The hydrostatic packer system and the impact control command system have been designed, thus achieving hydraulic conveying, ground send stick percussion type setting instruction, hydrostatic system receiving instruction to start the setting program and complete tubing sealing process. The tubing bridge plug for snubbing job has been applied in more than 80 wells in Zhongyuan Oilfield. With the ground annular sealing equipment and hy⁃draulic power control system, the bridge plug completed snubbing job, with the maximum sealing depth of 3 919 m, the highest sealing pressure of 24 MPa. With the test success rate of 100%, the new developed bridge plug has addressed theinner tubing plugging and sealing issue during snubbing job, providing a reliable technical support for inner tubing plugging and sealing for snubbing job.%针对滑块式油管堵塞器在不压井起管柱作业油管内堵塞密封中出现的自密封皮碗易磨损失效问题，研制了撞击式静液压油管桥塞。该油管桥塞采用单级双向楔形卡瓦和带防凸保护的大变径压缩式密封胶筒，并设计了静液压坐封系统及撞击控制指令系统，实现了液压输送、地面投棒撞击发射坐封指令以及静液压系统接收指令启动坐封程序完成油管内密封过程。该油管桥塞在中原油田规模化应用80余井次，配合地面环空密封设备及液压动力控制系统完成不压井起管柱作业，其中最大密封深度3919 m，最高密封压力为24 MPa，现场应用成功率100％，解决了不压井作业遇到的各种管柱油管内堵塞密封问题。该产品的研制成功为不压井作业油管内堵塞密封提供了可靠的技术支持。