PETROBRAS has been developing several studies in order to verify the structural feasibility of SCRs connected to production units such as FPSOs, semi-submersible and monocolumn platforms. Due to the great stresses developed at the top region as a consequence of the platforms rotation movements, robust stress joints or flex joints are always required to connect the SCRs to the platforms. However, those components may add high costs to any project, mainly where titanium is required. In attempt to avoid this fact, the objective of this work is to present a new top connection system called “Suspender”. This system is composed by the SCR, a mooring line segment, a flexible jumper and a “Y” shaped steel connector, and has the advantage of reducing the transmission of bending moments from the platform to the SCR. The performance of this alternative was compared to a more conventional one, composed by a SCR and a flex joint, and the obtained results indicate that this new system reduces the maximum stresses at the top region without changing the SCR behavior at the TDZ. It is also possible to extend the fatigue life by changing the SCR configuration.
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ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering
May 31–June 5, 2009
Honolulu, Hawaii, USA
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4343-7
PROCEEDINGS PAPER
A New Top Connection System for Steel Catenary Risers
Claudio Marcio Silva Dantas,
Claudio Marcio Silva Dantas
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Jose´ Renato Mendes de Sousa,
Jose´ Renato Mendes de Sousa
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Fernando Jorge Mendes de Sousa,
Fernando Jorge Mendes de Sousa
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Marcos Queija de Siqueira,
Marcos Queija de Siqueira
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Isai´as Quaresma Masetti
Isai´as Quaresma Masetti
CENPES - Petrobras, Rio de Janeiro, RJ, Brazil
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Claudio Marcio Silva Dantas
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Jose´ Renato Mendes de Sousa
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Fernando Jorge Mendes de Sousa
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Marcos Queija de Siqueira
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Isai´as Quaresma Masetti
CENPES - Petrobras, Rio de Janeiro, RJ, Brazil
Paper No:
OMAE2009-79980, pp. 805-811; 7 pages
Published Online:
February 16, 2010
Citation
Silva Dantas, CM, de Sousa, JRM, de Sousa, FJM, Queija de Siqueira, M, & Masetti, IQ. "A New Top Connection System for Steel Catenary Risers." Proceedings of the ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. Volume 3: Pipeline and Riser Technology. Honolulu, Hawaii, USA. May 31–June 5, 2009. pp. 805-811. ASME. https://doi.org/10.1115/OMAE2009-79980
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