Wireline valve actuator

Details Wireline valve actuator Wireline valve actuator

2005-01-25

2005-01-25

Hirsch, Paul J. (Department: 3753)

Valves and valve actuation

Blow-out preventers

C251S001300

Reexamination Certificate

active

06845958

ABSTRACT:
A wireline valve/blowout preventor is capable of resisting the flow of fluids through a bore. At least one actuator assembly has a first and second end moveable between a first configuration in which fluids can flow through the bore, and a second configuration in which fluids flow through the bore is prevented. The first and second ends are each exposed to the pressure in the bore. A biasing arrangement may bias the actuator assembly toward one of the first and second configurations. A locking member may also be provided to abut with the actuator assembly when it is in the second configuration in order to prevent movement of the actuator assembly from the second configuration to the first configuration. Also, the actuator assembly may have at least one rod assembly which extends from the actuator assembly to a position where it is visible from an outside of the apparatus.

REFERENCES:
patent: 3647174 (1972-03-01), LeRouax
patent: 3670761 (1972-06-01), Lerouax
patent: 3871613 (1975-03-01), LeRouax
patent: 4214605 (1980-07-01), Hardgrave
patent: 4519571 (1985-05-01), Jones et al.
patent: 4638972 (1987-01-01), Jones et al.
patent: 4877217 (1989-10-01), Peil et al.
patent: 5287879 (1994-02-01), Leggett et al.
patent: 2112837 (1982-12-01), None
Koomey Inc. vol 4, J-Line, Blowout Preventers, p. 4 (1986).

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