Offshore drilling vessel

摘要

A drilling vessel or drilling platform comprising: a hull with a moonpool; and a hydraulic riser tensioner system configured to apply a tension force from the drilling vessel or drilling platform upon a riser string, the riser tensioner system comprising: a riser ring, wherein the riser tensioner system is fastened to the riser string via the riser ring; a set of sheaves provided at each lateral side of the moonpool; a plurality of cables configured to extend between the drilling vessel or drilling platform to the riser ring via the sheaves; and a set of hydraulic cylinders actuating upon the sheaves and thereby applying the tension force to the cables, wherein the hydraulic cylinders are arranged substantially horizontally at the lateral sides of the moonpool.

主权项

1. A drilling vessel or drilling platform comprising:
a monohull with a bow and a stern and a moonpool; an accommodation topside having crew quarters and a bridge, the accommodation topside being arranged on the hull at the bow; a main deck between the accommodation topside and the stern, 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 multiple firing line hoist system mounted on the hull above the moonpool, the multiple firing line hoist system comprising a mast having a base that extends between sections of the hull on port and starboard side of the moonpool, the base being spaced from a bow side and from a stern side of the moonpool, thereby forming a front moonpool area forward of the mast and a rear moonpool area rearward of the mast; and a hydraulic riser tensioner system configured to apply a tension force from the drilling vessel or drilling platform upon a riser string, the hydraulic riser tensioner system comprising:
a riser ring, wherein the hydraulic riser tensioner system is fastened to the riser string via the riser ring;a set of sheaves provided at each lateral side of the moonpool;a plurality of cables configured to extend between the drilling vessel or drilling platform to the riser ring via the sheaves; anda set of hydraulic cylinders actuating upon the sheaves and thereby applying the tension force to the cables, wherein the hydraulic cylinders are arranged substantially horizontally at the lateral sides of the moonpool,wherein the hydraulic riser tensioner system is arranged at the front moonpool area.