Stress and torque reducing tool and method
Patent
·
OSTI ID:6040960
This patent describes an apparatus for coupling a sucker rod string to a subsurface reciprocating pump in a well bore for production of fluid. It comprises: a hollow body means having fluid ports in the upper and lower portions thereof; an aperture means within the lower portion of the hollow body means; a plunger means positioned within the hollow body means having a shank extending through the aperture means. The plunger means adapted for limited reciprocating relative movement within the hollow body means; means for attaching the upper portion of the hollow body means to the bottom of the sucker rod string and means for attaching the plunger means to the subsurface reciprocating pump such that the stress forces encountered in the operation of the subsurface reciprocating pump are dissipated by the apparatus through the limited reciprocating relative movement of the plunger means within the hollow body means; means for limiting relative rotational movement between the plunger means and the hollow body means.
- Assignee:
- NOV; EDB-91-055269; NOV-91-001041
- Patent Number(s):
- A; US 4963078
- Application Number:
- PPN: US s 7-199172
- OSTI ID:
- 6040960
- Country of Publication:
- United States
- Language:
- English
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