Method and apparatus for active heave compensation

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United States of America Patent

PATENT NO 8265811
APP PUB NO 20100057279A1
SERIAL NO

12517398

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Abstract

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Methods and apparatuses for active heave compensation, the method, in certain aspects, including the steps of: (a) measuring with a measurement device (44) the heave of a vessel (10) and outputting a heave signal representative thereof; (b) using said heave signal to compensate for said heave by moving a connection device (20) relative to said vessel (10) as a function of said heave signal, whereby movement due to said heave of a load attached to said vessel via the connection device is reduced; said heave signal comprising errors induced by said measurement device (44) whereby accuracy of said compensation is reduced; (c) processing said heave signal so as to reduce said errors and outputting an adjusted heave signal; and (d) using said adjusted heave signal to move said connection device (20) to compensate for said heave.

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Patent Owner(s)

Patent OwnerAddress
VARCO I/P INC2835 HOLMES ROAD HOUSTON TX 77051

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kyllingstad, Aage Algard, NO 1 25

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