Differential gas lift valve

Details Differential gas lift valve Differential gas lift valve

E - Fixed Constructions

21

B

166/41

E21B 21/10 (2006.01) F04F 1/08 (2006.01)

Patent

CA 1204382

ABSTRACT A gas lift valve device of the differentially operated type, having a straight, non-tortuous flow passage there- through, 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 prede- termined differential pressure and will open at a second pre- determined differential pressure which is lower than the first.

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