Heave compensation apparatus for a marine mining vessel

Details Heave compensation apparatus for a marine mining vessel Heave compensation apparatus for a marine mining vessel

1975-12-22

1977-08-02

Halvosa, George E. A.

Spring devices

Fluid

Expansible-contractible chamber device

92 10, 92143, 188289, F16F 9342

Patent

active

040391779

ABSTRACT:
A ship in which a string of heavy pipe is raised or lowered vertically beneath the ship at a substantially constant velocity in spite of heaving movement of the ship. The equipment for raising and lowering the pipe string is supported by the vessel through a heave compensation mechanism that permits vertical movement of the ship relative to the pipe raising and lowering mechanism. The heave compensation mechanism is a passive damped pneumatic-hydraulic spring system for isolating the vertical movement of the ship from the pipe raising and lowering equipment. The spring system operates over a very wide range of load imposed by the raising, lowering and supporting of a very long heavy pipe string.

REFERENCES:
patent: 3595349 (1971-08-01), Ortheil
patent: 3687013 (1972-08-01), Haller
patent: 3696712 (1972-10-01), Sung

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