Hydraulic and earth engineering – Marine structure or fabrication thereof – With work deck vertically adjustable relative to floor
Reexamination Certificate
2011-01-18
2011-01-18
Bagnell, David J (Department: 3672)
Hydraulic and earth engineering
Marine structure or fabrication thereof
With work deck vertically adjustable relative to floor
C405S204000, C405S205000, C114S264000, C114S265000
Reexamination Certificate
active
07871222
ABSTRACT:
A semi-submersible structure. The hull includes four columns that are supported by two pontoons. The columns support the topsides and the topsides structural framing serves as horizontal framing between the columns. A truss frame is attached to the columns. The truss frame preferably includes heave plates. The truss frame extends downward below the pontoons a sufficient distance in the water such that it minimizes motions caused by environmental forces. The hull section and the truss space frame are constructed separately and assembled together at the offshore site where the structure is used for drilling and/or production.
REFERENCES:
patent: 6340272 (2002-01-01), Runge et al.
patent: 6666624 (2003-12-01), Wetch
patent: 6761124 (2004-07-01), Srinivasan
patent: 6884003 (2005-04-01), Horton, III
Ding Yun
Soester William Lawrence
Andrish Sean
Bagnell David J
J. Ray McDermott S.A.
LaHaye D. Neil
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