Wells – Submerged well – Means removably connected to permanent well structure
Reexamination Certificate
2007-04-16
2010-10-26
Beach, Thomas A (Department: 3671)
Wells
Submerged well
Means removably connected to permanent well structure
C166S367000, C166S352000
Reexamination Certificate
active
07819195
ABSTRACT:
A riser tensioner has inner and outer cylindrical barrels that telescopingly engage each other. A small external tank is mounted outside of the barrels for communicating a small quantity of hydraulic fluid the seals between the inner and outer barrels. The external tank allows the internal volume of the cylinder rod assembly to be used for gas storage and reduces the need for accumulators. The fluid level in the external tank is checked via a sight glass, and the tank is isolated from the cylinder assembly by a combination of check and three-way valves, which allows easier access to the working fluid, and allows the addition or removal of high pressure fluid to the system without a high pressure fluid cart.
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Beach Thomas A
Bracewell & Giuliani
Buck Matthew R
Vetco Gray Inc.
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