Reliable Riser Systems for Spars

[+] Author and Article Information
L. Finn

Deep Oil Technology, 11757 Katy Freeway, Suite 500, Houston, TX 77079

J. Offshore Mech. Arct. Eng 121(4), 201-206 (Nov 01, 1999) (6 pages) doi:10.1115/1.2829568 History: Received April 24, 1998; Revised February 19, 1999; Online December 17, 2007


The Spar concept as a floating vessel is now recognized as a reliable and economic option for developing deepwater offshore hydrocarbon reservoirs. Many of the advantages of the Spar concept are attributed to the variety of riser systems that can be accommodated. This paper presents a discussion of design considerations for the top tensioned and steel catenary risers deployed from a Spar offshore production vessel. Results from extreme event strength analysis, Spar motion and current-induced fatigue analysis, and a riser-to-riser wake interference analysis are presented. Steel catenary risers are presented, including a comparison of results for risers supported by a Spar and a Semi. These analyses demonstrate that simple and reliable riser systems can be designed for use with the Spar platform concept.

Copyright © 1999 by The American Society of Mechanical Engineers
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