Title:
BUOYANCY DEVICE FOR MARINE STRUCTURES
Document Type and Number:
WIPO Patent Application WO/2010/041229
Kind Code:
A3
Abstract:
Disclosed is a buoyancy device for tensioning an elongate vertical (or quasi vertical) subsea structure at a point below the sea surface, anchored at its bottom. The device comprises as its main buoyancy elements a plurality of hollow elongate objects, and further comprises at least one auxiliary buoyancy element comprising a solid buoyant material. Ideally, the solid buoyant material provides enough uplift to maintain the device afloat should the main buoyancy elements be flooded. A riser apparatus comprising such a buoyancy device is also described.
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Inventors:
LEGRAS JEAN-LUC (US)
Application Number:
PCT/IB2009/055204
Publication Date:
December 16, 2010
Filing Date:
October 06, 2009
Export Citation:
Assignee:
ACERGY FRANCE SA (FR)
LEGRAS JEAN-LUC (US)
LEGRAS JEAN-LUC (US)
International Classes:
B63B22/02; B63B35/44; E21B17/01
Foreign References:
| FR2278563A1 | 1976-02-13 | |||
| US20020025229A1 | 2002-02-28 | |||
| US6213045B1 | 2001-04-10 | |||
| US3686886A | 1972-08-29 | |||
| GB1467800A | 1977-03-23 | |||
| DE2732911A1 | 1979-02-01 |
Attorney, Agent or Firm:
CUMMINGS, Sean et al. (Fleet Place House2 Fleet Place, London EC4M 7ET, GB)
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