External high pressure fluid reservoir for riser tensioner...

Details External high pressure fluid reservoir for riser tensioner... External high pressure fluid reservoir for riser tensioner...

E - Fixed Constructions

21

B

E21B 19/086 (2006.01)

Patent

CA 2629619

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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