Design requirements for pipelines regarding both ultimate strength and flow assurance in ultra deepwater scenarios motivated the development of a new sandwich pipe which is able to combine high structural and thermal insulation properties. In this concept, the annulus is filled with low cost materials with adequate thermal insulation properties and good mechanical resistance. The aim of this research work is to perform small-scale laboratorial tests and to develop a finite element model to evaluate the structural performance of such sandwich pipes with two different options of core material. After calibrated in view of the experimental results, a three-dimensional finite element model incorporating nonlinear geometric and material behavior is employed to perform strength analyses of sandwich pipes under combined external pressure and longitudinal bending. Ultimate strength envelopes for sandwich pipes are compared with those generated for single-wall steel pipes with equivalent collapse pressures. The study shows that sandwich pipe systems with either cement or polypropylene cores are feasible options for ultra deepwater applications.
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e-mail: ilson@lts.coppe.ufrj.br
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July 2005
Technical Papers
Strength Analyses of Sandwich Pipes for Ultra Deepwaters
Segen Farid Estefen,
Segen Farid Estefen
Ocean Engineering Department,
COPPE-Federal University of Rio de Janeiro
, P.O. Box 68508, Rio de Janeiro, RJ, 21945-970, Brazil
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Theodoro Antoun Netto,
Theodoro Antoun Netto
Ocean Engineering Department,
COPPE-Federal University of Rio de Janeiro
, P.O. Box 68508, Rio de Janeiro, RJ, 21945-970, Brazil
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Ilson Paranhos Pasqualino
Ilson Paranhos Pasqualino
Ocean Engineering Department,
e-mail: ilson@lts.coppe.ufrj.br
COPPE-Federal University of Rio de Janeiro
, P.O. Box 68508, Rio de Janeiro, RJ, 21945-970, Brazil
Search for other works by this author on:
Segen Farid Estefen
Ocean Engineering Department,
COPPE-Federal University of Rio de Janeiro
, P.O. Box 68508, Rio de Janeiro, RJ, 21945-970, Brazil
Theodoro Antoun Netto
Ocean Engineering Department,
COPPE-Federal University of Rio de Janeiro
, P.O. Box 68508, Rio de Janeiro, RJ, 21945-970, Brazil
Ilson Paranhos Pasqualino
Ocean Engineering Department,
COPPE-Federal University of Rio de Janeiro
, P.O. Box 68508, Rio de Janeiro, RJ, 21945-970, Brazile-mail: ilson@lts.coppe.ufrj.br
J. Appl. Mech. Jul 2005, 72(4): 599-608 (10 pages)
Published Online: October 26, 2004
Article history
Received:
December 1, 2003
Revised:
October 26, 2004
Citation
Estefen, S. F., Netto, T. A., and Pasqualino, I. P. (October 26, 2004). "Strength Analyses of Sandwich Pipes for Ultra Deepwaters." ASME. J. Appl. Mech. July 2005; 72(4): 599–608. https://doi.org/10.1115/1.1940667
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