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Pipe-in-Pipe Walking: Understanding the Mechanism, Evaluating and Mitigating the Phenomenon

[+] Author Affiliations
Q. Chen, H. K. Chia

Intecsea, Singapore

Paper No. OMAE2010-20058, pp. 73-79; 7 pages
  • ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering
  • 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 5, Parts A and B
  • Shanghai, China, June 6–11, 2010
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-4913-2 | eISBN: 978-0-7918-3873-0
  • Copyright © 2010 by ASME


This paper addresses the walking phenomenon of pipe-in-pipe system, which can cause the cumulative axial displacement, leading to the potential failures of tie-ins or risers. The main mechanism that drives the pipe-in-pipe walking is the nonlinear spacer-pipe friction (between the inner pipe and outer pipe) and pipe-soil friction, together with thermal transients along the pipe-in-pipe system during start-up and shutdown. Sensitivity studies are also performed by investigating the effect of variation in spacer-pipe friction coefficient, pipe-soil friction coefficient, transient temperature profile and internal pressure through detailed finite element simulation with Abaqus. The paper also presents some methods to mitigate the pipe-in-pipe walking and some advantages of selecting pipe-in-pipe system in deepwater development.

Copyright © 2010 by ASME
Topics: Pipes , Mechanisms



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