STANDING VALVE CATCHER OF DEEP-WELL SUCKER-ROD PUMP Russian patent published in 2004 - IPC

FIELD: oil producing industry.

SUBSTANCE: invention can be used in deep-well sucker-rod pumping units, namely, pipe pumps with mechanical fastening of extracted standing valve, particularly, in non-inserted sucker-rod pumps. Proposed catcher is made in form of bayonet containing catching journal with projections connected with extracted standing valve and catcher bushing connected with plunger on working end of which open inlet pair of slots is made dividing the bushing into two halves. Changing of said halves into lock pair is made in form of screw surface directed clockwise relative to working end face. Guide surface of inlet slots of each half of catcher bushing is made in form of one-side right-hand screw surface of length not less than half of axial pitch.

EFFECT: improved reliability of catcher, prevention of premature catching of bayonet joint.

4 dwg