Large Diameter Risers from Tanker FPSOs

Large Diameter Risers from Tanker FPSOs
June 1995
S. Hatton

Recent development work on the subject of dynamic rigid (steel pipe) risers demonstrates they are suitable for tanker FPSO developments. The potential cost savings over use of flexible risers is large, and the technology allows large diameter risers, up to 36 inches, to be considered. Pipeline off-loading from FPSOs can be considered as an alternative to shuttle tankers. This is necessary for development of gas reserves and where existing infrastructure can be economically used.

Two large diameter rigid riser configurations are described and discussed. The systems are developments of steel catenary riser technology recently used on the Auger TLP. The configurations are suitable for a wide range of water depths and environments including the Atlantic Frontier.

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