Safety valve
A direct acting safety valve is described for installation within a well flow conductor. The method comprises: a housing means with a longitudinal flow passageway extending therethrough; a valve closure means having a first position allowing fluid flow through the longitudinal flow passageway and a second position blocking fluid flow through the longitudinal flow passageway; an operator sleeve slidably disposed within the housing means to shift the valve closure means from its second position to its first position and partially defining the longitudinal flow passageway; and piston means slidably attached to the operator sleeve and partially defining variable volume chamber means between the exterior of the operator sleeve and the interior of the housing means.
- Assignee:
- Otis Engineering Corp., Dallas, TX
- Patent Number(s):
- US 4664195
- OSTI ID:
- 6534073
- Resource Relation:
- Patent File Date: Filed date 31 Jan 1986
- Country of Publication:
- United States
- Language:
- English
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