Marine compliant riser system and method for its installation

E - Fixed Constructions – 21 – B

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166/51

E21B 17/01 (2006.01) B63B 22/02 (2006.01)

Patent

CA 1170566

F-0692-L MARINE COMPLIANT RISER SYSTEM AND METHOD FOR ITS INSTALLATION Abstract: A marine compliant riser system for connecting a marine floor base to a marine surface facility includes a multiconduit riser section ascending from the marine floor base to a submerged buoy section and a plurality of flexible flowlines operatively connected to the riser section for coupling to the surface facility and located at the buoy section in a yoke assembly (82) comprising a yoke beam (83) having a plurality of spaced recesses (84) for receiving flexible flowline terminations (92); a plurality of loading gates (85) e æ h pivotally mounted on the yoke beam adjacent a termination receiving recess and having supporting arms for the flexible flowline termination to permit lateral loading of the flexible flowline (70) into the gate; means (86) for closing and for locking each loading gate to retain each flexible flowline termination in the recess in an upwardly directed substantially vertical attitude; coupling means (90) for operatively connecting each upwardly directed flexible flowline termination to a corresponding downwardly directed conduit (41) on the buoy section; and means (98) for lifting each flexible flowline termination from its loading gate into operative connection with the corresponding downwardly directed conduit on the buoy section to establish fluid communication from the riser section to the flexible flowlines.

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