Annular blowout preventer

Details Annular blowout preventer Annular blowout preventer

1975-03-28

1977-02-15

Schwadron, Martin P.

Valves and valve actuation

Blow-out preventers

251 5, 277127, 277235R, E21B 3306

Patent

active

040079040

ABSTRACT:
There is disclosed an annular blowout preventer wherein a packer, received within a recess about a bore through the preventer housing, is adapted to be contracted by means of a piston having an annulus of resilient material movable inwardly within a chamber surrounding the recess and divided therefrom by a wall of the housing, and a disc-shaped member of resilient material extending through and sealably slidable within a slot in the wall to transmit the inward movement of the piston to the packer.

REFERENCES:
patent: 3090591 (1963-05-01), Clarkson
patent: 3492007 (1970-01-01), Jones
patent: 3572627 (1971-03-01), Jones
patent: 3572628 (1971-03-01), Jones
patent: 3614111 (1971-10-01), Regan
patent: 3737139 (1973-06-01), Watts

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