Hydraulic and earth engineering – Marine structure or fabrication thereof – With anchoring of structure to marine floor
Reexamination Certificate
2005-04-26
2005-04-26
Singh, Sunil (Department: 3673)
Hydraulic and earth engineering
Marine structure or fabrication thereof
With anchoring of structure to marine floor
C405S224000, C405S223100
Reexamination Certificate
active
06884003
ABSTRACT:
A semi-submersible floating platform for offshore drilling and/or production of petroleum product from the seabed includes a base having a first moon pool; a plurality of vertical outer buoyancy columns extending upwardly from the base; a deck structure supported by the buoyancy columns and having a second moon pool; a central columnar buoyancy apparatus having a lower portion guided within the first moon pool and an upper portion guided within the second moon pool; and at least one vertical riser passing through the buoyancy apparatus. Each riser has a lower portion that is horizontally restrained within the buoyancy apparatus below the center of gravity thereof. In a preferred embodiment, the platform includes at least two vertical risers attached to a single buoyancy apparatus.
REFERENCES:
patent: 4217848 (1980-08-01), Meyer-Haake
patent: 4913238 (1990-04-01), Danazcko et al.
patent: 5150987 (1992-09-01), White et al.
patent: 5439321 (1995-08-01), Hunter
patent: 6375391 (2002-04-01), B.o slashed.rseth et al.
patent: 6746182 (2004-06-01), Munk et al.
Deepwater Technologies, Inc.
Klein Howard J.
Klein O'Neill & Singh, LLP
Singh Sunil
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