Downhole pump with safety valve

Details Downhole pump with safety valve Downhole pump with safety valve

1981-06-04

1984-04-03

Leppink, James A.

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

166382, 166 68, 166106, 166332, 417448, E21B 3416

Patent

active

044402317

ABSTRACT:
Apparatus and methods are provided for installing and removing a downhole rod pump form a well while preventing flow of fluids from the well through a production tubing string.

REFERENCES:
patent: 200357 (1878-02-01), Swett
patent: 564674 (1896-07-01), Wilson
patent: 1353391 (1920-09-01), Hall
patent: 1754946 (1930-04-01), Haskell
patent: 2133655 (1938-10-01), Brotzman et al.
patent: 2215164 (1940-09-01), Shupe
patent: 2327503 (1943-08-01), Coberly
patent: 2429848 (1945-03-01), Smith
patent: 3419076 (1968-12-01), Sizer et al.
patent: 3473606 (1969-10-01), Page, Jr.
patent: 4161215 (1979-07-01), Bourne, Jr. et al.
patent: 4211279 (1980-07-01), Isaacks

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