Ram-type blowout preventer and packer therefor

Valves and valve actuation – Blow-out preventers – Radial reciprocating ram

Patent

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Details

277232, 277233, E21B 3306

Patent

active

045537305

ABSTRACT:
An improved ram-type blowout preventer including a housing with a vertical bore therethrough and opposed, aligned ram guideways extending outward from the bore through the housing, a ram in each of the guideways, means for moving each of the rams inwardly and outwardly in its guideway, a front packer in each of the rams, the front packer including an upper plate, a lower plate, a resilient packing between the plates, a layer of woven non-metallic fabric embedded in the packing immediately below the front of the upper plate with the fabric extending from the front to the rear of the packing and completely through the central portion and into the side portions of the packing and the fabric being woven from material selected from the group consisting of aramid fibers, glass fibers, polyester fibers, nylon fibers and carbon fibers.

REFERENCES:
patent: 2194259 (1940-03-01), Allen
patent: 2639198 (1953-05-01), Kirkham
patent: 3720140 (1973-03-01), Lee
patent: 3762729 (1973-10-01), Hopp
patent: 4428592 (1984-01-01), Shaffer

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