Improved Current Profile Criteria for Deepwater Riser Design

[+] Author and Article Information
Gus Jeans

Fugro GEOS, Gemini House, Hargreaves Road, Swindon, Wiltshire, SN25 5AL UKe-mail: g.jeans@geos.com

Colin Grant

bp, Deepwater Upstream Technology, Compass Point, 79-87 Kingston Road, Staines, Middlesex, TW18 1DY UKe-mail: grantck@bp.com

Graham Feld

Fugro GEOS, 6100 Hillcroft (77081), Houston, Texas 77274e-mail: g.feld@geos.com

J. Offshore Mech. Arct. Eng 125(4), 221-224 (Oct 01, 2003) (4 pages) doi:10.1115/1.1596235 History: Received April 01, 2002; Revised September 01, 2002; Online October 01, 2003
Copyright © 2003 by ASME
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Jeans, G., and Feld, G., 2001, “A Method for Deriving Extreme Current Profiles to Support Design of Deep Water Drilling Risers,” Proceedings of the 20th International Conference on Offshore Mechanics and Arctic Engineering, OMAE01/OFT-1181, Rio de Janeiro, Brazil.
Forristall, G. Z., and Cooper, K. C., 1997, “Design Profiles Using Empirical Orthogonal Function (EOF) and Inverse FORM Methods,” Proceedings of the 29th Annual Offshore Technology Conference, OTC 8267, Houston, TX.


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Idealized tidal, residual and total current velocity profiles at a time when tidal currents reinforce near-surface residual currents
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Idealized tidal, residual and total current velocity profiles at a time when tidal currents reinforce near-bed residual currents
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Speed profiles: (a) associated with maximum near-surface speeds; (b) associated with maximum near-bed speeds; and (c) constructed from maximum values at each depth
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Vertical structure profiles of the first two EOF modes
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Bounding envelope containing all EOF mode amplitude values occurring in the measured data. Example points are marked (a), (b) and (c).
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Three distinct types of reconstructed current speed profiles corresponding to points (a), (b) and (c) in Fig. 5.




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