Gas-lift valve
Patent
·
OSTI ID:5468876
A form of gas-lift valve apparatus is provided, wherein the check-valve portion is relocated upstream of the main shutoff components, relative to injection gas input, to eliminate trapping low pressure between the main shutoff and check-valve components. Adjustment means is provided for selectively adjusting the compression force supplied by the load spring on the main valve stem to permit adjustment of the operating pressure range to correspond with borehole depth and other environmental factors. (15 claims)
- Assignee:
- McMurry Oil Tools Inc.
- Patent Number(s):
- US 3575194
- OSTI ID:
- 5468876
- Country of Publication:
- United States
- Language:
- English
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