Developing and Applying of Two-Way Anchoring Blowout Preventer for Progressing Cavity Pump

The existing screw pump anti-rotating anchor can only one-way limit screw pump rotation, positive screw pump and reverse screw pump need to equip with anti-rotating anchor separately, and no having blowout prevention function, in the construction of the liquid is easy to spill out of the wellhead, causing pollution of the environment, at the same time the production of a certain security risks. For this reason, the development of screw pump two-way anchoring blowout preventer anchor, which is composed of central pipe, elastic ring, rotating shell, moving slip, fixed shell, fixed slip, bolt; Circumferential slide way is arranged on the rotating shell of anti-rotating anchor. The rotating shell drives the moving slip to rotate in both directions. The Angle between the moving slip and the fixed slip ranges from 0 to 135˚. Eight Wells were successfully anchored at one time. The average operation time was 542 days. No failure occurred during the operation, and the repeated utilization rate was 100%. With the continuous improvement and application of two-way anchoring anti-rotating anchor, the convenience, safety and reliability of screw pump well construction can be effectively improved, and the efficient lifting of screw pump well can be well realized.