Passive Heave Compensator

WIPO Patent Application WO/2014/122527

A3

A passive heave compensator comprising: a main hydraulic cylinder, including a moveable piston having a piston rod extendible through the main hydraulic cylinder and a piston head, a gas phase above the piston head, and at least one oil phase below the piston head separated by a boundary; an upper connection point associated with the main hydraulic cylinder and a lower connection point associated with the piston rod; and at least one accumulator, the or each accumulator having a moveable separator to divide the accumulator between a gas phase above the separator, and an oil phase below the separator, and the or each oil phase being in communication with an oil phase in the main hydraulic cylinder; characterized in that the main hydraulic cylinder further comprises a cylinder sleeve co-axial with the piston head to provide, in co-ordination with the piston head, the boundary between the gas phase and the at least one oil phase in the main hydraulic cylinder. In this way, the variation in the coordination between the shape, longitudinal position, or both of the piston head, which naturally must be smaller in cross- section than the cross-section of the main hydraulic cylinder, and the transverse extent of the cylinder sleeve, provides variation in the cross-sectional area of oil volume in the main hydraulic cylinder, and thus different damping effects along the length of the main hydraulic cylinder, which are available to the user.

CANNELL DAVID (GB)
LABBE CHRISTOPHE (BR)
ODIGIE ERIC (GB)
RIDDELL SHAUN (GB)

PCT/IB2014/000172

July 02, 2015

February 05, 2014

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TECHNIP FRANCE (FR)

B63B39/03; E21B19/00

US7934561B2	2011-05-03
US20050077049A1	2005-04-14
US20050074296A1	2005-04-07
EP1908985A1	2008-04-09

Richaud, Fabien (55 Allée Pierre ZillerCS50105, Valbonne Sophia Antipolis, FR)

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