Invention Grant
- Patent Title: Anti-recoil control design using a hybrid riser tensioning system in deepwater drilling
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Application No.: US16561899Application Date: 2019-09-05
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Publication No.: US11028655B2Publication Date: 2021-06-08
- Inventor: Yin Wu , Edward Peter Kenneth Bourgeau
- Applicant: Aspin Kemp & Associates Holding Corp.
- Applicant Address: CA Montague
- Assignee: Aspin Kemp & Associates Holding Corp.
- Current Assignee: Aspin Kemp & Associates Holding Corp.
- Current Assignee Address: CA Montague
- Agency: Jones Robb, PLLC
- Main IPC: E21B19/00
- IPC: E21B19/00 ; 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.
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