For downhole reciprocating pumps, a no tap tool with a clutch

Details For downhole reciprocating pumps, a no tap tool with a clutch For downhole reciprocating pumps, a no tap tool with a clutch

E - Fixed Constructions

21

B

E21B 17/00 (2006.01) E21B 17/07 (2006.01) F04B 53/14 (2006.01)

Patent

CA 2557419

A tool which connects the last sucker rod of a sucker rod string to a downhole pump has a circularly cylindrical cylinder and piston so that the piston slides reciprocally and rotates freely within the cylinder. However, the closed upper end of the cylinder and the upper face of the piston have a cooperable tongue and groove which prevent relative rotational motion of the piston in the cylinder when the tongue is engaged in the groove so that the tool can be disconnected from the pump in response to rotation of the string at the uppermost stroke of the plunger to engage and turn the tongue and groove.

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