Patent ID: 8079426

Claim:
A drilling platform adapted to float in a body of water, said body of water comprising a sea bed, the drilling platform comprises: a lower pontoon structure; a plurality of columns extending upwards from the lower pontoon structure; an upper deck structure connecting the upper portions of the columns to each other; a derrick, a detachable rotary table assembly, a spider, and a blow-out-preventer, said blow-out preventer being adapted to be lowered to said sea bed; wherein: the upper deck structure is provided with a rotary table opening, which is adapted to receive the detachable rotary table assembly and to allow the blow-out-preventer to pass through; the derrick is arranged on the upper deck structure above the rotary table opening; a lower deck structure is arranged below the upper deck structure at a vertical distance that is less than the height of the blow-out-preventer.