Choosing the Most Appropriate Rigid Catenary Riser Design for Various Deepwater and harsh Environments

Event:
Choosing the Most Appropriate Rigid Catenary Riser Design for Various Deepwater and harsh Environments
Date:
May 1998
Author:
N. Alderton, R. Thethi

As operators commence the development of deep water fields, the interest in cost effective riser solutions increases. Some of these fields have particularly severe design conditions such as harsh environments and high temperature and pressure. These factors make riser design particularly challenging and may be beyond the scope of riser systems traditionally used in shallow water applications. One emerging technology is the use of steel pipe configured in compliant catenary arrangements. Medium grade steel pipe has a low cost compared to flexible pipe, but since it has a much larger minimum bend radius, careful consideration must be given to optimising the riser arrangement to achieve an acceptable performance.

Several types of steel catenary riser have been developed, each having characteristics which make it better suited for particular applications. This paper discusses these characteristics and the applications appropriate to each type of riser.

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