Fluid saving blowout preventer operator system

Details Fluid saving blowout preventer operator system Fluid saving blowout preventer operator system

2007-12-31

2009-12-29

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

Valves and valve actuation

Blow-out preventers

Radial reciprocating ram

C251S284000, C166S085400

Reexamination Certificate

active

07637474

ABSTRACT:
A hydraulic blowout preventer operator comprises a piston rod having one end coupled to a closure member. The operator further comprises an operator housing having one end coupled to a bonnet and a second end coupled to a head. The piston rod extends through the bonnet into the operator housing where it is coupled to a piston that is disposed within the operator housing. The piston comprises a body and a flange. A flange seal is disposed on the flange and is sealingly engaged with the operator housing. A body seal is disposed on the body and is sealingly engaged with the operator housing. The flange seal has a sealing diameter greater than a sealing diameter of the body seal.

REFERENCES:
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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