Steel Catenary Risers in Deepwater Environments

Event:
Steel Catenary Risers in Deepwater Environments
Date:
June 2000
Author:
N. Willis

The STRIDE JIP was initiated by 2H Offshore Engineering and BP in Spring 1997 to investigate aspects relating to deepwater steel catenary risers (SCR’s). The bulk of the work has been associated with welded steel risers, and whilst these may appear to be simple extensions of the seabed pipeline in terms of installation and design aspects, special design considerations must be applied.

Phase I of STRIDE performed detailed analysis of riser configurations and looked closely at installation issues [1]. Key areas for further investigation were then taken into Phase II, including:

  • Vortex Induced Vibration (VIV)
  • Riser welding and fatigue issues
  • Riser Touch Down Point (TDP) behaviour

Whilst a number of SCR’s had already been deployed at the start of Phase II, STRIDE was looking to confirm design criteria, reduce design conservatism and reduce development costs, a popular view judging by the level of industry sponsorship for the project.

STRIDE Phase II completed in December 1999. This paper describes the prime areas of interest, together with how this work is now being developed within STRIDE Phase III.

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