Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1975-11-03
1978-05-16
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
040895327
ABSTRACT:
A blowout preventer ram assembly adapted to seal the mouth of the hole of oil and gas wells in the process of their drilling. The ram assembly incorporates two rams, each of which comprises a ram rubber constituted by two arcuate members of larger and smaller radii, and a ram block provided with a projection is placed in the gap therebetween. The ram rubber is reinforced on the end faces by control members each of which consists of two parts. The first part is defined by two rigidly interconnected plates arranged in the arcuate member of the ram rubber of a smaller radius. One face of each plate has a radius corresponding to that of the largest pipe of the set of pipes to be sealed, while a second face is arranged parallel to the end face of the ram rubber, and a third face is arranged at an angle to the first face and is in contact with the ram block. The second part of the control member of the ram rubber is arranged in the arcuate member of a larger radius and has a guide for this part to move in a direction normal to the end face of the ram rubber. A cavity is provided between the arcuate member of the ram rubber of a smaller radius and the ram block, while on the inner surface of the ram holder, within the area of control members of the ram rubber, provision is made for grooves into which part of the ram rubber is displaced in the process of pipe sealing.
REFERENCES:
patent: 1861614 (1932-06-01), Schweitzer
patent: 1963683 (1934-06-01), Shaffer
patent: 2746710 (1956-05-01), Jones
patent: 3434729 (1969-03-01), Shaffer et al.
patent: 3572627 (1971-03-01), Jones
Danin Boris Konstantinovich
Kamyshnikov Arkady Ivanovich
Rutitsky Alexandr Isaakovich
Speransky Vladimir Mikhailovich
Gerard Richard
Schwadron Martin P.
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