ANTI-RECOIL CONTROL DESIGN USING A HYBRID RISER TENSIONING SYSTEM IN DEEPWATER DRILLING

Title:

ANTI-RECOIL CONTROL DESIGN USING A HYBRID RISER TENSIONING SYSTEM IN DEEPWATER DRILLING

Document Type and Number:

WIPO Patent Application WO/2016/100382

Kind Code:

A3

Abstract:

A riser data logging system can be installed on the riser top to provide real time information of the riser, instead of or in addition to relying on sensors installed on a tensioner. The riser recoil detection system can thus be made independent of any motion of the vessel. This logging system can feedback the riser top acceleration, velocity, position, and the wire-line tensions into a controller. By comparing the acceleration difference between the riser top and the vessel body, the controller can provide more reliable and faster detection of events occurring on a vessel, potentially detecting the condition within one second. If the acceleration exceeds a certain limit, the electrical tensioners are able to reduce the wire-line tension nearly instantaneously, providing a much more effective anti-recoil control that conventional hydro- pneumatic tensioners.

Inventors:

WU YIN (US)
BOURGEAU EDWARD PETER KENNETH (US)

Application Number:

PCT/US2015/065880

Publication Date:

August 18, 2016

Filing Date:

December 15, 2015

Export Citation:

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Assignee:

TRANSOCEAN SEDCO FOREX VENTURES LTD
WU YIN (US)
BOURGEAU EDWARD PETER KENNETH (US)

International Classes:

E21B7/12

Domestic Patent References:

WO2013096128A1	2013-06-27
WO2013154566A1	2013-10-17

Foreign References:

US20130158680A1	2013-06-20
US7328741B2	2008-02-12
US5209302A	1993-05-11
US20140010596A1	2014-01-09

Other References: