Manual blowout preventer with invertible rams

Details Manual blowout preventer with invertible rams Manual blowout preventer with invertible rams

1990-05-21

1990-12-11

Fox, John C.

Valves and valve actuation

Blow-out preventers

Radial reciprocating ram

E21B 3306

Patent

active

049764020

ABSTRACT:
Two embodiments of a wireline blowout preventer are disclosed. The rams in each embodiment are keyed to end bodies which close the outer ends of body cross bores for the rams. One blowout preventer embodiment utilizes cross pins having flat surfaces positioned in each end body. The pin flat surfaces slidably engage flat surfaces on a sleeve connected and keyed to each ram to key rams to end bodies. The other embodiment keys the rams to the end bodies with a square sleeve connected and keyed to each ram. Each square sleeve is moveable through square hole in the end body. The end bodies may be positioned inverted, inverting the rams to prevent flow downwardly through the blowout preventer when the rams are in closed position.

REFERENCES:
patent: 1910698 (1933-05-01), King
patent: 2194258 (1940-03-01), Allen
patent: 2238357 (1941-04-01), Allen
patent: 2278050 (1942-03-01), Allen et al.
patent: 3791616 (1974-02-01), Le Reuax

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