Flow controlling apparatus

Details Flow controlling apparatus Flow controlling apparatus

1984-07-25

1985-05-28

Novosad, Stephen J.

Valves and valve actuation

Fluid actuated or retarded

Piston type expansible chamber reciprocating valve actuator

251 1R, F16K 31122

Patent

active

045195773

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: 3036807 (1962-05-01), Lucky et al.
patent: 3299783 (1967-01-01), Mazue
patent: 3405607 (1968-10-01), Vollbehr
patent: 3946806 (1976-03-01), Meynier

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