Offshore drilling vessel

Patent metadata

Field	Value
Publication number	US-8992276-B2
Application number	US-201414203066-A
Country	US
Kind code	B2
Filing date	Mar 10, 2014
Priority date	Feb 15, 2008
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

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.

First claim

What is claimed is:

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 mult…

Assignees

• Itrec Bv

Inventors

• Wijning Diederick Bernardus
• Roodenburg Joop

Classifications

• B63B35/4413 Primary

  Operations & Transport · mapped topic

• B63B2003/147

  Operations & Transport · mapped topic

• E21B19/09

  Fixed Constructions · mapped topic

• E21B19/155

  Fixed Constructions · mapped topic

• E21B19/143

  Fixed Constructions · mapped topic