Blowout preventer having a variable ram seal

Details Blowout preventer having a variable ram seal Blowout preventer having a variable ram seal

1980-05-02

1982-06-01

Spiegel, H. Jay

Valves and valve actuation

Blow-out preventers

277188A, 277192, E21B 3306

Patent

active

043323677

ABSTRACT:
A blowout preventer is disclosed as including a ram-type seal element which can be compressed and deformed to seal around a variety of pipe sizes. The seal element is molded from a resilient rubber material and includes a generally semicircular section to sealingly engage pipes. A plurality of metallic support elements are embedded in the seal to support the rubber material for deformation essentially only in a radial inward direction to conform to the drill string pipe size, when force is applied to the seal by the ram hydraulic system.

REFERENCES:
patent: 1989429 (1935-01-01), Segezhorst et al.
patent: 3434729 (1969-03-01), Shaffer et al.
patent: 3572628 (1971-03-01), Jones
patent: 3667721 (1972-06-01), Veyasinovic
patent: 3736982 (1973-06-01), Veyasinovic
patent: 3946806 (1976-03-01), Meymer
patent: 4044988 (1977-08-01), Arzumanov et al.
patent: 4089532 (1978-05-01), Kamyshnikov et al.
patent: 4099699 (1978-07-01), Allen
patent: 4229012 (1980-10-01), Williams

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