Pipes and tubular conduits – With pressure compensators – Variable capacity chambers
Reexamination Certificate
2008-04-08
2008-04-08
Brinson, Patrick F. (Department: 3754)
Pipes and tubular conduits
With pressure compensators
Variable capacity chambers
C138S031000, C138S043000, C138S026000, C137S207000
Reexamination Certificate
active
11449046
ABSTRACT:
An accumulator comprises a housing connected to a hydraulic system, an elastomeric bladder separating a gas compartment from a fluid compartment, and an anti-extrusion device. A method for operating an accumulator comprises connecting the accumulator to a hydraulic system, injecting an inert gas into a gas compartment to a precharge pressure, moving an anti-extrusion device to prevent a bladder from extruding into the hydraulic system, running the accumulator and the hydraulic system downhole, moving the anti-extrusion device to allow fluid communication between the hydraulic system and a fluid compartment, generating pressure fluctuations within the hydraulic system, and expanding or contracting the bladder in response to the pressure fluctuations without moving the anti-extrusion device. A method of improving fluid hammer performance comprises connecting the fluid hammer to an accumulator that produces a greater delivered horsepower from the fluid hammer as compared to a baseline horsepower when operating without the accumulator.
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UK Search Report dated Sep. 14, 2007.
Swadi Shantanu N.
Underwood Lance D.
Brinson Patrick F.
Conley & Rose, P.C.
Smith International Inc.
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