Vetco Offshore Industries, Inc.

Edward Larralde

This invention relates to apparatus for the control of a weight suspended from a vessel employing a pneumatic suspension system subject to heave action so as to maintain the pressure in the pneumatic system substantially constant during the heave of the vessel as the result of the wave action.

Methods and apparatus for the control of a suspended weight from a

The traveling block of the derrick mounted on a floating barge is connected in off-center relation with a load supporting motion compensator cylinder, the sheaves being located and strung asymmetrically with respect to the center line of the motion compensator cylinder. The crown block sheaves are rotatable on axes which are skewed to reduce fleet angle of the line. Different size sheaves are strung differently and different numbers of line runs are strung differently to equalize the forces about the center of gravity of the mass of the traveling block.

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Santa Barbara, CA, United States of America

Edward Larralde