Shear ram blowout preventer

Details Shear ram blowout preventer Shear ram blowout preventer

1980-11-06

1982-09-07

Leppink, James A.

Wells

Means for perforating, weakening, bending or separating pipe...

With disparate below ground feature

251 1A, 277129, E21B 2908, E21B 3306

Patent

active

043478980

ABSTRACT:
There is disclosed a ram type blowout preventer having a pair of shear rams adapted to shear pipes suspended in the bore of the preventer and subsequently seal off the bore. The rams utilize a transverse packing for sealing between the shear blades when they are closed. One shear ram has a ramp adapted to engage a shoulder on the opposing ram so as to urge the shearing blades closer together as they are closing and thereby reduce the vertical gap which the transverse seal must bridge.

REFERENCES:
patent: 2060248 (1936-11-01), Schweitzer
patent: 2060252 (1936-11-01), Shaffer et al.
patent: 2919111 (1959-12-01), Nicolson
patent: 3561526 (1971-02-01), Williams, Jr. et al.
patent: 3736982 (1973-06-01), Vujasinovic
patent: 3817326 (1974-06-01), Meynier
patent: 3946806 (1976-03-01), Meynier
patent: 4132265 (1979-01-01), Williams, Jr.
patent: 4132266 (1979-01-01), Randall
patent: 4240503 (1980-12-01), Holt, Jr. et al.

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