Actuator module for wireline cutting safety valve

Details Actuator module for wireline cutting safety valve Actuator module for wireline cutting safety valve

1977-09-23

1980-04-22

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

Piston type expansible chamber reciprocating valve actuator

251291, 285316, 285319, F16K 31122, F16K 3100, F16L 3718

Patent

active

041991311

ABSTRACT:
A portable add-on actuator module for use with a wireline cutting surface safety valve to provide supplemental energy for closing and simultaneously cutting a wireline extending through the surface safety valve in the event of an emergency. The unit includes a spring loaded locking collet assembly arranged to engage a locking recess within the stem of a surface safety valve so that the spring force may be added to normal valve closing forces such as line pressure and valve stem springs to supplement such forces for insuring the cutting by the surface valve member of a wireline extending through the member. The actuator module has a body which rests on the safety valve body without the use of any connecting structure. The module also includes structure for hydraulically compressing the spring for connecting the module on a safety valve and for hydraulically shifting the latching collet assembly to a disengaging condition for releasing the module from a safety valve.

REFERENCES:
patent: 2784987 (1957-03-01), Cocoran
patent: 3290003 (1966-12-01), Kessler
patent: 3330341 (1967-07-01), Jackson et al.
patent: 3378224 (1968-04-01), Boyle
patent: 3387865 (1960-06-01), Ross
patent: 3635793 (1972-01-01), Kolb et al.
patent: 3847413 (1974-11-01), Gurley et al.
patent: 3958592 (1976-05-01), Wells et al.

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