Dump valve

Details Dump valve Dump valve

1979-10-26

1981-06-23

Pate, III, William F.

Wells

Packers or plugs

Controllable passage through packer

137 68R, 166317, 417319, 417555A, E21B 3710

Patent

active

042744849

ABSTRACT:
Disclosed is an apparatus for swabbing wells. A cup type swab and dump valve are carried on the same mandrel. The dump valve protects the apparatus from excessive fluid load and drag.

REFERENCES:
patent: 2854929 (1958-10-01), McGowen, Jr.
patent: 2994280 (1961-08-01), Duffin
patent: 3150607 (1964-09-01), Riley
patent: 4099451 (1978-07-01), Blackwell
patent: 4190108 (1980-02-01), Webber

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