The Petroleum Industry has been looking for a configuration for large diameter steel risers, which can be used either at FPSO’s or Semi Submersible Platforms. An interesting option with a low cost increase is the lazy-wave configuration, which is obtained by the addition of buoyancy modules along a limited length of the riser, close to its touch down area. The steel lazy-wave riser is usually checked for the standard failure modes in the operational phase. The present work shows that it is also necessary in the early stages of design, to define an installation procedure in order to assure configuration feasibility, as high stresses develop at riser hog and sag areas as a function of buoyancy modules installation. Riser configuration changes during the installation process demands managing top angle, launched length and distances between the platform and the installation vessel. The limitations of the installation’s equipment have to be taken into account as well. The methodology for the riser analysis in obtaining a feasible solution is outlined. The riser analysis is performed using the Petrobras in-house computer code, ANFLEX and considers a real application scenario for study.
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2004 International Pipeline Conference
October 4–8, 2004
Calgary, Alberta, Canada
Conference Sponsors:
- International Petroleum Technology Institute
ISBN:
0-7918-4176-6
PROCEEDINGS PAPER
Methodology for Analysis of Installation of a Steel Lazy Wave Riser Available to Purchase
Marcio M. Mourelle,
Marcio M. Mourelle
Petrobras - R&D Center, Rio de Janeiro, RJ, Brazil
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Marcos Queija de Siqueira,
Marcos Queija de Siqueira
COPPE-UFRJ, Rio de Janeiro, RJ, Brazil
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Gabriela Grisolia de Avila,
Gabriela Grisolia de Avila
COPPE-UFRJ, Rio de Janeiro, RJ, Brazil
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Ana Lucia F. Lima Torres
Ana Lucia F. Lima Torres
Petrobras - R&D Center, Rio de Janeiro, RJ, Brazil
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Marcio M. Mourelle
Petrobras - R&D Center, Rio de Janeiro, RJ, Brazil
Marcos Queija de Siqueira
COPPE-UFRJ, Rio de Janeiro, RJ, Brazil
Gabriela Grisolia de Avila
COPPE-UFRJ, Rio de Janeiro, RJ, Brazil
Ana Lucia F. Lima Torres
Petrobras - R&D Center, Rio de Janeiro, RJ, Brazil
Paper No:
IPC2004-0110, pp. 1945-1950; 6 pages
Published Online:
December 4, 2008
Citation
Mourelle, MM, de Siqueira, MQ, de Avila, GG, & Torres, ALFL. "Methodology for Analysis of Installation of a Steel Lazy Wave Riser." Proceedings of the 2004 International Pipeline Conference. 2004 International Pipeline Conference, Volumes 1, 2, and 3. Calgary, Alberta, Canada. October 4–8, 2004. pp. 1945-1950. ASME. https://doi.org/10.1115/IPC2004-0110
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