Catamaran-type semisubmersible drilling vessel for offshore drilling

摘要

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 handling 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.