China's Yantai CIMC Raffles (CIMC Raffles) announced Aug. 28 that Frigstad Deepwater Rig Alfa, the biggest ultra-deepwater semisubmersible drilling rig in the world with dual drilling towers, constructed by CIMC Raffles for Frigstad Deepwater Offshore, ushers its steel cutting in Haiyang CIMC Raffles Offshore Ltd. (HCRO)'s yard in Haiyang, Shangdong Province, China. Harald Frigstad, chairman of Frigstad Deepwater Company, CEO Simen S Eriksen, and Yu Ya, president of CIMC Raffles jointly start the steel cutting machine.
Frigstad Deepwater Rig Alfa belongs to the latest generation of ultra-deepwater semisubmersible drilling rig and also the second one constructed by CIMC Raffles for Frigstad Deepwater Company. This platform is a drilling rig with length of 580.7 feet (177 meters), width of 304.1 feet (92.7 meters) and height of 387.1 feet (118 meters), maximum displacement of 70,000 tons, maximum operating water depth of 12,000 feet (3,658 meters), drilling depth of 50,000 feet (15,250 meters) and dual top drives load of 1,250 short tons. Besides, it is equipped with DP3 dynamic positioning system. This platform enters into Norway Classification Society. It owns spacious efficient space and convenient maintenance access and for the first time, employs DP3 enclosed circle design, detritus cabin processing and storage system and ballast water treatment system. What’s more, due to its NOV hydraulic dual towers design, its production efficiency will be highly improved on the basis of security guarantee. This drilling rig is workable in multi deepwater areas, such as Mexico Gulf, China South Sea, Australia, Brazil Sea, West Africa and South Atlantic, etc.
Its basic design is provided by Frigstad Engineering Company and detail design, construction design, construction and commissioning work will be borne by CIMC Raffles. Besides, CIMC Raffles will independently complete the installment and commissioning of the entire drilling system. CIMC Raffles will continue to employ the unique construction mode, that is, carrying out parallel construction of deck box and lower hull and fulfilling mating by 20,000 tons gantry crane.
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