Variable bore packer assembly for ram-type blowout preventers

Details Variable bore packer assembly for ram-type blowout preventers Variable bore packer assembly for ram-type blowout preventers

1978-04-28

1980-10-21

Schwadron, Martin P.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

251 1A, E21B 3306

Patent

active

042290120

ABSTRACT:
A packer assembly for a blowout preventer having movable rams consisting of two packers, in which the packer assembly is of deformable material for sealing around a well member extending through the preventer and has a variable bore so that it will effectively seal around members, such as pipe, within a range of sizes or diameters. More particularly, each packer includes a main body of deformable material having an arcuate or curved recess with the wall defining said recess forming a sealing surface, and deformable side sealing elements or portions at each side of said recess, said side sealing elements being of a size, configuration and volume which are so related to the deformable material of the main body that when the packer assembly is moved inwardly toward and around a well member or pipe extending through the preventer, a substantially uniform radial displacement of the main body and of the side sealing elements is effected to assure uniform circumferential sealing about said object or pipe.

REFERENCES:
patent: 1695992 (1928-12-01), Bergsten
patent: 1721806 (1929-07-01), Crowell
patent: 3434729 (1969-03-01), Shaffer et al.
patent: 3572627 (1971-03-01), Jones
patent: 3897039 (1975-07-01), Le Rouax
patent: 4044988 (1977-08-01), Arzumanov et al.
patent: 4089532 (1978-05-01), Kamyshnikov et al.

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