Invention Grant
- Patent Title: Method and system for laying a submarine pipeline
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Application No.: US16614590Application Date: 2018-05-25
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Publication No.: US11549614B2Publication Date: 2023-01-10
- Inventor: Flavio Conti , Diego Forestali
- Applicant: SAIPEM S.P.A.
- Applicant Address: IT Milan
- Assignee: SAIPEM S.P.A.
- Current Assignee: SAIPEM S.P.A.
- Current Assignee Address: IT Milan
- Agency: Cantor Colburn LLP
- Priority: IT102017000057253 20170526
- International Application: PCT/IB2018/053734 WO 20180525
- International Announcement: WO2018/215981 WO 20181129
- Main IPC: F16L1/235
- IPC: F16L1/235 ; F16L1/19 ; B63B35/03 ; B23K101/10 ; E21B43/01 ; F16L1/26

Abstract:
A method of laying an off-shore pipeline (1) comprises: —installing on the seabed (3) a fixed receiving structure (4) having a redirecting device (5), —paying-out from a laying vessel (7) a pipeline (1) with the pipeline end termination device (9) vertically towards the seabed (3), —extending a damping cable (6) from the pipeline end termination device (9) through the redirecting device (5) to an underwater damping buoy (14), —connecting an underwater suspension buoy (15) to the pipeline end termination device (9), —inclining the pipeline (1) from a vertical orientation towards the horizontal orientation, using: —the suspension buoy (14) to counterbalance at least part of the weight of the pipeline end termination device (9), —the damping buoy (14) for damping the pipeline (1).
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