Blowout preventer for coiled tubing

Details Blowout preventer for coiled tubing Blowout preventer for coiled tubing

1995-05-12

1997-01-07

Fox, John C.

Valves and valve actuation

Blow-out preventers

Radial reciprocating ram

251 11, E21B 3306

Patent

active

055908675

ABSTRACT:
The present invention provides a blowout preventer in which a first set of hydraulic ports communicate with either side of a first piston coupled to a first piston rod, a second set of hydraulic ports communicate with either side of a second piston coupled to a second piston rod, and the first and second pistons and associated piston rods may be actuated independent of each other. Each piston rod is coupled to a ram, and preferably, the first piston rod is coupled to a pipe ram and the second piston rod is coupled to a slip ram. A feature of the present invention provides that all of these elements are contained within a single chamber extending laterally of and communicating with the bore of a BOP.

REFERENCES:
patent: 2855172 (1958-10-01), Jones
patent: 3554480 (1971-01-01), Rowe
patent: 4646825 (1987-03-01), Van Winkle
patent: 4943031 (1990-07-01), Van Winkle

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