Semi-submersible platform

Details Semi-submersible platform Semi-submersible platform

1989-10-16

1991-08-13

Swinehart, Ed

Ships

Floating platform

Multiple leg

114264, B63B 3544

Patent

active

050387022

ABSTRACT:
A semi-submersible platform supported on columns with pontoons extending between and outboard of the columns. Damper plates are provided by flat surfaces either on top of the outboard section of the pontoons or by plates positioned on the columns above the pontoons to provide heave and pitch stabilization and motion phase control in relation to the wave action such that when the platform is in the drilling mode, the heave phase of the platform is approximately one hundred eighty degrees out of phase with wave action, and in the survival mode, heave action of the platform is substantially in phase with wave action, such that the platform will ride with the storm waves allowing the use of shorter columns than the current art.

REFERENCES:
patent: 3160135 (1964-12-01), De Vries
patent: 3490406 (1970-01-01), O'Reilly et al.
patent: 4112864 (1978-09-01), Bergman

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