Wireline blowout preventer

Details Wireline blowout preventer Wireline blowout preventer

1985-07-08

1986-04-22

Schwadron, Martin P.

Fluid handling

With cleaner, lubrication added to fluid or liquid sealing...

Liquid supplied at valve interface

137553, 251 13, 277 72FM, F16K 336

Patent

active

045835691

ABSTRACT:
A ram-type blowout preventer having a removable seal insert contained in an insert cavity formed in the forward end of the ram body. Each seal insert includes an elastomeric body which forms an inner seal portion having a forward seal face and two outer seal portions which extend laterally into slot openings in the ram body. In each seal face is set a rigid cup which defines a cup-shaped cavity. When the rams are brought together to close the valve the two cups join together rim-to-rim to form a grease chamber between the seal forces.

REFERENCES:
patent: 577147 (1897-02-01), Paul
patent: 3043371 (1962-07-01), Rector
patent: 3291490 (1966-12-01), Balmer
patent: 4214605 (1980-07-01), Hardgrave
patent: 4227543 (1980-10-01), Williams, Jr.

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