Weight actuated tubing valve
A weight actuated, tubing conveyed, production valve, is described which consists of: a tubing sub having upper and lower connecting ends for installation within a string of tubing extending from the surface within a well bore, the tubing sub having an outer cylindrical sidewall with at least one opening therein; an inner mandrel spaced apart from the outer cylindrical sidewall to thereby create an annular space between the exterior of the inner mandrel and the interior of the outer cylindrical sidewall, the inner mandrel having at least one opening therein which communicates the interior of the tubing string with the annular space; sliding sleeve along within the annular space having at least one opening therein for communicating the tubing interior, annular space and well annulus; a coil spring located in the annular space above the sliding sleeve for initially biasing the sliding sleeve toward the open position; an annular fluid chamber located below the sliding sleeve and initially containing a substantially incompressible fluid for supporting the sliding sleeve within the annular space in the first position; frangible means initially containing the fluid within the annular space; port means for communicating the well annulus with the annular space above the sliding value, to thereby provide annulus pressure for moving the sliding value to the open position when the support fluid is released.
- Assignee:
- Hughes Tool Co., Houston, TX
- Patent Number(s):
- US 4603741
- OSTI ID:
- 5375731
- Resource Relation:
- Patent File Date: Filed date 19 Feb 1985
- Country of Publication:
- United States
- Language:
- English
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