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1. (WO2016064275) DRILLING VESSEL AND METHOD FOR OPERATING A DRILLING VESSEL ADAPTED TO RUN LARGE DIAMETER CASING STRINGS

Pub. No.:    WO/2016/064275    International Application No.:    PCT/NL2015/050735
Publication Date: Fri Apr 29 01:59:59 CEST 2016 International Filing Date: Sat Oct 24 01:59:59 CEST 2015
IPC: B63B 27/04
B63B 35/44
E21B 19/00
E21B 19/14
Applicants: ITREC B.V.
Inventors: ROODENBURG, Joop
WIJNING, Diederick Bernardus
Title: DRILLING VESSEL AND METHOD FOR OPERATING A DRILLING VESSEL ADAPTED TO RUN LARGE DIAMETER CASING STRINGS
Abstract:
The present invention relates to a method for operating a drilling vessel adapted to run large diameters surface casing joints having a diameter of over 20 inch (51cm) and a length of 30- 50 feet (9-15 meters), and build a surface casing string. According to the invention three or more surface casing joints are interconnected into pre-assembled surface casing stands having a length of over 100 feet (30 meters). These surface casing stands are substantially horizontally stored and transferred by a casing stand handling system to a surface casing string handling capacity hoisting device, which subsequently lowers the surface casing string.