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Title:
TRANSPORTATION AND INSTALLATION OF SUBSEA RIGID TIE-IN CONNECTIONS
Document Type and Number:
WIPO Patent Application WO/2015/107421
Kind Code:
A9
Abstract:
A method of transporting a rigid tie-in connection (10) across a body of water (22) for installation underwater. The method comprises: supporting the tie-in connection (10) in the water by buoyancy acting on a frame (12) that supports the tie-in connection (10) until installation; lowering the buoyancy-supported frame (12) and the tie-in connection (10) into a sub-surface transit configuration; and in the transit configuration, towing the buoyancy-supported frame (12) and the tie-in connection (10) behind a towing vessel (38) toward an installation site. A system for implementing the method comprises: a towable frame (12) arranged to support the tie-in connection (10) until installation; and external buoyancy (30) attached to the frame (12) by an extensible suspension link (14) arranged to suspend the frame (12) from the buoyancy (30) in water in use, the link being extensible to lower the frame (12) from a raised surface-tow configuration into a lowered sub-surface transit configuration.

Inventors:
VIELLARD, Brice (103 rue de Bellevue, Boulogne-Billancourt, F-92100, FR)
Application Number:
IB2015/000240
Publication Date:
February 04, 2016
Filing Date:
January 14, 2015
Export Citation:
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Assignee:
ACERGY FRANCE SAS (1 Quai Marcel Dassault, Suresnes, F-92150, FR)
International Classes:
F16L1/24; F16L1/26
Attorney, Agent or Firm:
CUMMINGS, Sean (Keltie LLP, No. 1 London Bridge, London SE1 9BA, GB)
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