MOORING SYSTEM FOR SEMISUBMERSIBLE DRILLING PLATFORM

摘要

AbstractA mooring system for a semisubmersible platform usedfor drilling in arctic waters wherein a self-powered mooringring acts as a guide and support for a plurality of mooringcables anchored to the ocean floor at widely spaced pointsaround the drill site. The mooring ring has ballast tanks andcompressed air tanks, with remotely controlled valves to controlthe buoyancy of the ring. The ring is detachably secured to theplatform and the cables detachably secured to mooring winches onthe plarform. The ring can be raised and lowered between theocean floor and the bottom of the semisubmerged platform struc-ture by remotely or manually controlling the buoyancy, permittingthe ring and collar to be detached and lowered to the ocean floorwhen not in use, and later raised and attached to the platformwhen the platform is moved on location.