Annular blowout preventer

Details Annular blowout preventer Annular blowout preventer

1976-10-15

1978-06-20

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

E21B 3306

Patent

active

040958051

ABSTRACT:
There is disclosed an annular blowout preventer having a packer comprising an annulus of resilient material which is movable from an open bore position to a constricted, closed bore position by means which include links arranged to exert a force on the packer having a radially inwardly directed component which increases with the force required to seal the packer about successively smaller pipes.

REFERENCES:
patent: 2812197 (1957-11-01), Gibson
patent: 3994472 (1976-11-01), Williams

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