Well Pump Downhole Specialized Anti-Drop Device Well Clean-up Valve
|Purchase Qty. (Pieces)||FOB Price|
|1-9||US $100 / Piece|
|10+||US $80 / Piece|
It is used to prevent sucker rod from thread off, installed on the lower end of polish rod. When polished rod rotating in clockwise, it can transmit torque to PC pump through this device. Otherwise, when polished rod or sucker rod rotating in anticlockwise, its upper and lower inserts unlock, the torque cannot transmit to lower end thus prevent the thread off.