Blowout preventer and improved ram packer structure

Details Blowout preventer and improved ram packer structure Blowout preventer and improved ram packer structure

1979-02-01

1981-05-05

Cline, William R.

Valves and valve actuation

Blow-out preventers

E21B 3306

Patent

active

042654246

ABSTRACT:
A blowout preventer having a housing with a bore extending therethrough and guideways intersecting the bore, a ram in each of the guideways, a packer in the face of each of the rams, a recess between the back of each packer and the face of the ram into which the packer can expand to partially reduce the sealing pressure on the packers and at least one passage communicating from the bore below the guideways to the recess to transmit well pressure to the recess.

REFERENCES:
patent: 1087021 (1914-02-01), Kerbaugh
patent: 2107200 (1938-02-01), Kennon
patent: 2278050 (1942-03-01), Allen et al.
patent: 2690320 (1954-09-01), Shaffer
patent: 2760751 (1956-08-01), Wilde
patent: 3102709 (1963-09-01), Allen
patent: 3379255 (1968-04-01), Burns et al.

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