Catamaran-type semisubmersible drilling vessel for offshore...

Details Catamaran-type semisubmersible drilling vessel for offshore... Catamaran-type semisubmersible drilling vessel for offshore...

B - Operations, Transporting

63

B

114/58.2

B63B 35/44 (2006.01) E21B 19/00 (2006.01) E21B 19/14 (2006.01)

Patent

CA 1300986

ABSTRACT The semisubmersible drilling vessel has two spaced, substantially parallel, substantially horizontal, elongated submersible hulls, a deck supported above said hulls and connected thereto by a mounting structure, the deck having a central opening overhanging said space between the two hulls and surmounted by a derrick, said mounting structure having vertical columns, whereof at least two pairs connect the ends of the hulls to the deck and means for the storage and hand- ling of the pipes. Moreover, the mounting structure also has at least two hollow columns forming caissons and internally provided with the pipe storage means arranged in such a way as to permit the vertical storage thereof, said columns facing and being spaced from one another substantially in the centre of each hull. Figure 1

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