Differential pressure gas lift valve
Patent
·
OSTI ID:5998823
A subsurface well gas-lift valve has a gas inlet choke or orifice for gas supplied through the well casing and an outlet into the tubing string. A piston valve is shiftable between open and closed positions to control gas flow between the inlet and outlet, the piston valve having a greater effective area subject to gas pressure on the downstream side of the inlet choke when in open position than its area subject to the tubing pressure when in closed position. This permits the choke to be of a greatly increased area, while maintaining a small difference between the pressure differential at which valve opening occurs and the presure differential at which valve closing occurs. (9 claims)
- Assignee:
- Baker Oil Tools Inc
- Patent Number(s):
- US 3559672
- OSTI ID:
- 5998823
- Country of Publication:
- United States
- Language:
- English
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