Invention Grant
- Patent Title: Anti-recoil control design using a hybrid riser tensioning system in deepwater drilling
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Application No.: US14970219Application Date: 2015-12-15
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Publication No.: US09988861B2Publication Date: 2018-06-05
- Inventor: Yin Wu , Edward Peter Kenneth Bourgeau
- Applicant: Transocean Sedco Forex Ventures Limited
- Applicant Address: KY
- Assignee: Transocean Sedco Forex Ventures Limited
- Current Assignee: Transocean Sedco Forex Ventures Limited
- Current Assignee Address: KY
- Agency: Norton Rose Fulbright US LLP
- Main IPC: E21B19/00
- IPC: E21B19/00 ; E21B17/01 ; E21B33/038

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.
Public/Granted literature
- US20160168927A1 ANTI-RECOIL CONTROL DESIGN USING A HYBRID RISER TENSIONING SYSTEM IN DEEPWATER DRILLING Public/Granted day:2016-06-16
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