Dual-cylinder blowout preventer operator system

Details Dual-cylinder blowout preventer operator system Dual-cylinder blowout preventer operator system

2008-05-20

2008-05-20

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

Blow-out preventers

Radial reciprocating ram

C251S285000, C251S001100, C166S085400

Reexamination Certificate

active

07374146

ABSTRACT:
A hydraulic blowout preventer operator comprises a first piston rod coupled to a closure member. The operator further comprises a first operator housing coupled to a bonnet and a head. The first piston rod extends through the bonnet into the first operator housing where is couples to a first piston disposed within the first operator housing. The operator further comprises a second piston rod coupled to the closure member. The second piston rod has a longitudinal axis that is parallel to a longitudinal axis of the first piston rod. The second piston rod extends through the bonnet into a second operator housing and is coupled to a second piston that is disposed within the second operator housing.

REFERENCES:
patent: 4492359 (1985-01-01), Baugh
patent: 5287879 (1994-02-01), Leggett et al.
patent: 5505426 (1996-04-01), Whitby et al.
patent: 6969042 (2005-11-01), Gaydos

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