Patent ID: 9284025
Filing Date: 2016-03-15
CPC Classification: B63B,E21B

Claim Text:
1. A monohull offshore drilling vessel comprising: a hull having a moonpool, a bow and a stern; an accommodation topside having crew quarters and a bridge, said accommodation topside being arranged on the hull at the bow; a main deck between the accommodation topside and the stern of the vessel, wherein a front main deck portion of the main deck extends forward of the moonpool and a rear main deck portion of the main deck extends rearward of the moonpool; a firing line hoist system mounted on the hull at said moonpool, comprising: a mobile working deck, wherein said mobile working deck is movable between a remote position and a riser string assembly position, wherein said remote position allows a blowout preventer to be brought into the firing line and manipulated by the hoisting device, wherein in said riser string assembly position the mobile working deck covers a portion of the moonpool with said firing line extending through an opening in said mobile working deck, and wherein said mobile working deck is provided with a riser string suspension device that in said riser string assembly position is configured to suspend from the mobile working deck in the firing line a riser string with the blowout preventer attached to the lower end of the riser string, wherein the hull comprises an engine room below the accommodation topside, the engine room containing one or more fuel powered engines and generators driven by said one or more engines to provide on-board power, and wherein one or more exhausts associated with the one or more engines extend upward to one or more exhaust outlets above the top of the accommodation topside.