Differential gas lift valve

Details Differential gas lift valve Differential gas lift valve

1982-07-29

1984-12-25

Schwadron, Martin P.

Fluid handling

Diverse fluid containing pressure systems

Gas lift valves for wells

137498, 417115, F04F 108

Patent

active

044897430

ABSTRACT:
A gas lift valve device of the differentially operated type, having a straight, non-tortuous flow passage therethrough, with a hollow valve stem providing a portion of such passage, said device having a floating seat which automatically moves to valve engaging position to check backflow, the area of said seat being larger than the area of a piston on said stem and arranged so that the valve will close at a first predetermined differential pressure and will open at a second predetermined differential pressure which is lower than the first.

REFERENCES:
patent: 2348564 (1944-05-01), Otis
patent: 2588715 (1952-03-01), Garrett
patent: 2601654 (1952-06-01), Wright
patent: 2668554 (1954-02-01), Seyffert
patent: 3523744 (1970-08-01), Holladay
patent: 3552490 (1971-01-01), Dollison
patent: 3888273 (1975-06-01), Douglas

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