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Dynamic Behavior of a Vertical Riser and Service Life Reduction

[+] Author Affiliations
Celso K. Morooka, Fábio M. Coelho

State University of Campinas, Campinas, SP, Brazil

Elton J. B. Ribeiro, Ricardo Franciss

Petrobras/CENPES, Rio de Janeiro, RJ, Brazil

José A. Ferrari, Jr.

Petrobras/E&P Corporation, Rio de Janeiro, RJ, Brazil

Paper No. OMAE2005-67294, pp. 605-610; 6 pages
  • ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering
  • 24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 1, Parts A and B
  • Halkidiki, Greece, June 12–17, 2005
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 0-7918-4195-2 | eISBN: 0-7918-3759-9
  • Copyright © 2005 by ASME


In the last years, the most of offshore oil and gas reserves discoveries in Brazil are placed in ultra-deep water depths. Petroleum production from these offshore fields needs developments with novel solutions in terms of necessary technologies and economical viability. The use of vertical rigid risers such as top tensioned risers (TTR) and others like combined systems as self standing hybrid risers and steel catenary risers for ultra-deep waters have shown viable from both, technical and economical aspects. However, there are needs for detailed studies on their dynamic behavior in order to improve, particularly, the understanding of influence of the environment as wave and current, and floating platform oscillations at the riser top. The present work presents studies on vertical top tensioned riser dynamic behavior through time domain simulations of its displacements and respective, bending moments and stresses. Influences of the vortex induced vibrations (VIV) and waves on the riser service life reduction are analyzed. Maximum and minimum envelops for displacements and stresses along riser length are shown.

Copyright © 2005 by ASME



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