Depth compensated subsea passive heave compensator
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United States of America Patent
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May 3, 2011
Grant Date -
Oct 16, 2008
app pub date -
Apr 8, 2008
filing date -
Apr 10, 2007
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Abstract
A depth compensated passive eave compensator comprises a first cylinder connected at its upper end to a vessel. A piston rod extends from a piston located within the first cylinder through the lower end thereof and is connected to subsea equipment. A second cylinder contains a compressed gas which maintains pressure beneath the piston of the first cylinder. The upper end of the first cylinder is connected to the upper end of a third cylinder having a piston mounted therein. A piston rod extending from the piston of third cylinder extends through the lower end thereof thereby applying the pressure of the sea to the piston of the third cylinder.
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