Dual string automatic gas lift valve
Patent
·
OSTI ID:5076558
An automatically operated, pressure responsive gas-lift injection valve is described for use in a dual zone string. The device employs a pressure-operated switching valve for delivering injection gas to the tubing string having the highest column of fluid. The switching valve is responsive to the tubing pressure in each of the 2 production strings and, sensing the higher of the 2 tubing pressures, opens that string to lift gas injected through the casing annulus. (15 claims)
- Assignee:
- Dresser Industries Inc.
- Patent Number(s):
- US 3851997
- OSTI ID:
- 5076558
- Country of Publication:
- United States
- Language:
- English
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