Differential pressure operated gas lift valve

Details Differential pressure operated gas lift valve Differential pressure operated gas lift valve

1994-11-08

1996-06-04

Michalsky, Gerald A.

Fluid handling

Diverse fluid containing pressure systems

Gas lift valves for wells

417109, F16K 2406

Patent

active

055224180

ABSTRACT:
A differential pressure operated gas lift includes a valve element movable in a tubular body to open and close a gas flow passage having flow restricting orifices upstream thereof. A coil spring tends to open the valve element. In the open position of the valve element an external pressure responsive surface engages a seat which is axially adjustable to vary the spring force and change the length of travel of the valve element between its open and closed positions. The reopening differential pressure can be changed while maintaining the same closing pressure differential. Very large injection rates can be implemented at low differential pressures.

REFERENCES:
patent: 2305250 (1942-12-01), Garrett et al.

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