Blowout preventers having shear rams

Details Blowout preventers having shear rams Blowout preventers having shear rams

1984-11-07

1986-04-08

Novosad, Stephen J.

Wells

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

With disparate below ground feature

92 65, E21B 2908

Patent

active

045806268

ABSTRACT:
There is disclosed a blowout preventer having rams with cutting edges for shearing a pipe within the vertical bore through the preventer housing which rams carry means for gripping opposite sides of the pipe above the cutting edges of the rams, as the rams move toward one another to shear the pipe, and lifting the upper sheared end of the gripped pipe out of the path of means for sealing between the inner ends of the rams, as the rams continue to move toward one another.

REFERENCES:
patent: 787479 (1905-04-01), Tanner
patent: 3946806 (1976-03-01), Meynier, III
patent: 4132266 (1979-01-01), Randall

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