Well pump device

Details Well pump device Well pump device

2005-02-22

2005-02-22

Bagnell, David (Department: 3672)

Wells

With eduction pump or plunger

With packer or plug

C166S068500, C166S101000, C166S105000, C166S107000, C166S135000

Reexamination Certificate

active

06857472

ABSTRACT:
A well pump device, especially for use in connection with the recovery of hydrocarbons, wherein the pump is carried to a predetermined position within a well pipe. The pump is provided with an external seal which is arranged to prevent fluid from flowing from the pressure side of the pump past the pump to the suction side thereof.

REFERENCES:
patent: 3225697 (1965-12-01), Brown
patent: 3891031 (1975-06-01), Ortiz
patent: 3974878 (1976-08-01), Roeder et al.
patent: 4693271 (1987-09-01), Hargrove et al.
patent: 4928771 (1990-05-01), Vandevier
patent: 5297943 (1994-03-01), Martin

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