Title:
ASSEMBLY AND METHOD FOR SUBSEA WELL DRILLING AND INTERVENTION
Document Type and Number:
WIPO Patent Application WO/2011/067353
Kind Code:
A3
Abstract:
An assembly (5) suitable for subsea drilling and intervention operations includes a dual blow out preventer system having an upper blow out preventer (10) located between a drill floor (35) and a riser string (40), and a lower blow out preventer (20) located below the riser string and above a wellhead. The dual BOP system is adapted to enable advanced drilling and intervention operations such as Managed Pressure Drilling ("MPD"), Underbalanced Drilling ("UBD"), or Through Tubing Rotary Drilling ("TTRD") in an offshore deepwater environment.
Inventors:
HUMPHREYS GAVIN (GB)
Application Number:
PCT/EP2010/068771
Publication Date:
October 13, 2011
Filing Date:
December 02, 2010
Export Citation:
Assignee:
STENA DRILLING LTD (GB)
HUMPHREYS GAVIN (GB)
HUMPHREYS GAVIN (GB)
International Classes:
E21B17/01; E21B33/038
Domestic Patent References:
| WO2000052299A1 | 2000-09-08 | |||
| WO2009061211A2 | 2009-05-14 | |||
| WO2009102216A2 | 2009-08-20 | |||
| WO2005100737A1 | 2005-10-27 |
Attorney, Agent or Firm:
LUCAS, Brian, Ronald (Warlingham, Surrey CR6 9HJ, GB)
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