Ships – Floating platform – Multiple leg
Patent
1989-06-02
1991-05-07
Brown, David H.
Ships
Floating platform
Multiple leg
114125, B63B 3544
Patent
active
050127560
ABSTRACT:
A floating structure (11) with completely or partially submersible pontoons that provide the buoyancy for an offshore drilling platform, with a deck that is located on columns (13) attached to the pontoons. A separate, submerged ballast unit (15) is attached to the pontoons to help stabilize the floating structure and improve its motion in waves. The ballast unit (15) is approximately the same size in the horizontal plane as the extent of the pontoons (14) and is attached to the floating structure at each corner by at least three vertical struts (16) that extend through and below the pontoons. The struts being attached so that they can be connected or removed from a locking device on the top side of the pontoons. At the upper end of the struts (16) there is an attachment head (24) which can be connected and removed from a lifting device such as a wire (25) driven by a winch mounted on the platform.
REFERENCES:
patent: 3001370 (1961-09-01), Templeton
patent: 3515084 (1970-06-01), Holmes
patent: 3983828 (1976-10-01), Stram
patent: 3986471 (1976-10-01), Haselton
patent: 4169424 (1979-10-01), Newby et al.
patent: 4320993 (1982-03-01), Hunter
patent: 4702648 (1987-10-01), Stageboe et al.
patent: 4829928 (1989-05-01), Bergman
Brown David H.
Pittenger James E.
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