Stress and torque reducing tool and method

Details Stress and torque reducing tool and method Stress and torque reducing tool and method

1988-05-26

1990-10-16

Smith, Leonard E.

Pumps

Expansible chamber type

Valved piston

188286, F04B 2104

Patent

active

049630784

ABSTRACT:
A stress and torque reducing tool particularly useful in production of petroleum fluids from oil wells employing a reciprocating pump located within the well bore in the reservoir which is operated by means of sucker rods attached to a surface walking beam pump operating unit. The tool is deployed intermediate the sucker rod string and the plunger rod of the downhole reciprocating pump and provides a means for hydraulically dissipating shock forces encountered in the operation of the subsurface reciprocating pump occurring from fluid pound, gas pound and/or deliberately bottoming the plunger rod to avoid gas lock.

REFERENCES:
patent: 1658962 (1928-02-01), Aikens
patent: 2153816 (1939-04-01), Stevens
patent: 2258493 (1941-10-01), Hull
patent: 2259021 (1941-10-01), Wineman
patent: 2674956 (1954-04-01), Hilton
patent: 2693758 (1954-11-01), Pierce
patent: 2953352 (1960-09-01), Webb
patent: 3051237 (1962-08-01), Liles, Jr. et al.
patent: 3292552 (1966-12-01), Chancellor et al.
patent: 3338141 (1967-08-01), Ramsay
patent: 4332533 (1982-06-01), Spears
patent: 4571162 (1986-02-01), Knox
patent: 4779852 (1988-10-01), Wassell
Foreign Engineering News, Mar. 15, 1957, p. 20.

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