Test valve having automatic bypass for formation pressure
Patent
·
OSTI ID:6481455
A well test apparatus is described having, in a well, an annulus therearound. An elongated housing has a fluid passage extending longitudinally therethrough and a fluid passage opening and closing means for such passage. A further fluid passage permits fluid flow through the housing from the longitudinally extending passage to the annulus. A differential pressure responsive valve means for the further passage is responsive to pressure in the longitudinally extending passage for urging the valve means open to fluid flow in the further passage from the longitudinally extending passage to the annulus, and is responsive to annulus pressure for urging the valve means to a closed condition for fluid flow through the further passage.
- Assignee:
- Baker International Corp.
- Patent Number(s):
- US 4105075
- OSTI ID:
- 6481455
- Country of Publication:
- United States
- Language:
- English
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