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Vortex Induced Motion (VIM) Performance of the Multi Column Floater (MCF)–Drilling and Production Unit

[+] Author Affiliations
Arcandra Tahar, Lyle Finn

Horton Wison Deepwater, Inc., Houston, TX

Paper No. OMAE2011-50347, pp. 755-763; 9 pages
doi:10.1115/OMAE2011-50347
From:
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 7: CFD and VIV; Offshore Geotechnics
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4439-7
  • Copyright © 2011 by ASME

abstract

This paper presents the VIM model tests of the Multi Column Floater (MCF). The MCF is a new drilling and production deep-draft semisubmersible platform developed by Horton Wison Deepwater in Houston. A vertically restrained well deck or Multi Riser Buoyancy Can (MRBC) configured in the center of the MCF is a technology enabler for dry tree semisubmersible. The MRBC independently supports and tensions the production and drilling risers. The production risers may be a combination of dry tree risers and subsea tree tubing risers. VIM model tests were carried out at the FORCE Technology basin during the period of September-October, 2007 for the internal study. The test emphasis was to understand the physical behavior of the MCF at model scale so that a thorough correlation study could be carried out. The inplace model test analysis as well as comparison with numerical tools has been published in the OMAE2010-20640 paper [1]. VIM performance of the MCF that uses cellular construction for the columns is the focus of this paper. The 1:55.88 scale model tests were conducted. The MCF mooring stiffness, riser stiffness, natural periods and mass properties were closely matched with target full-scale properties. The MCF was tested without strakes. A wide range of towing speeds in 3 headings was covered in the test programs. The VIM response was measured for different reduced velocity (Ur ). A total of 38 tests were done.

Copyright © 2011 by ASME
Topics: Motion , Drilling , Vortices

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