Title:
CONTROL OF FLEXIBLE RISER CURVATURE AT THE KEEL OF A FLOATING STRUCTURE
Document Type and Number:
WIPO Patent Application WO2008022274
Kind Code:
B1
Abstract:
A bend-limiting conduit controls the curvature of a catenary riser extending from the seafloor as it enters the centerwell of a spar-type offhsore platform through the keel of the platform. The conduit has a bore dimensioned to receive the riser, and it extends from an upper end constrained within the keel to a lower end disposed below the keel. The conduit has increasing flexibility and weight per unit length from the upper end to the lower end, which results in a lateral load being applied to the riser as it passes through the conduit, thereby causing a gentle and gradual transition in the riser from a curved configuration at the lower end of the conduit, to a straight configuration as it emerges from the upper end of the conduit.
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Inventors:
O'SULLIVAN JAMES (US)
Application Number:
PCT/US2007/076128
Publication Date:
May 22, 2008
Filing Date:
August 16, 2007
Export Citation:
Assignee:
TECHNIP FRANCE (FR)
O'SULLIVAN JAMES (US)
O'SULLIVAN JAMES (US)
International Classes:
E21B17/01
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