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Patent Searching and Data


Title:
DRILLING SYSTEM AND METHOD
Document Type and Number:
WIPO Patent Application WO/2017/115344
Kind Code:
A3
Abstract:
A method for managed pressure drilling comprising: extending a drilling riser (2) with a drill string (20) from a floating installation (52) to a subsea blow-out preventer stack (1); providing a first fluid in the drilling riser annulus (12) and a second fluid in a fluid conduit (6,7) extending from the floating installation (52), where the first fluid has a higher density than the second fluid; circulating the second fluid through a control valve (31) which is fluidly connected to the fluid conduit (6,7) and operating the control valve (31) to apply a surface back pressure so as to obtain a pre-determined, desired combined hydrostatic and frictional circulation pressure below the subsea blow-out preventer stack (1).

Inventors:
VAVIK DAG (NO)
Application Number:
PCT/IB2017/053052
Publication Date:
September 21, 2017
Filing Date:
May 24, 2017
Export Citation:
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Assignee:
FUTURE WELL CONTROL AS (NO)
International Classes:
E21B21/08
Domestic Patent References:
WO2011058031A22011-05-19
WO2012095340A22012-07-19
Foreign References:
US20130206423A12013-08-15
US20020117332A12002-08-29
GB2506400A2014-04-02
Attorney, Agent or Firm:
ZACCO NORWAY AS (0125 Oslo, NO)
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