Deepwater Riser VIV Monitoring

Deepwater Riser VIV Monitoring
May 1999
H. Howells, F. Lim

Vortex induced vibrations (VIV’s) are a major design consideration for all deepwater riser systems, including drilling, production and intervention risers. Cross-flow vibrations of risers in severe currents can add to costs at all stages of field development and drive the design arrangement of the riser, fabrications details, production vessel layout and field layout. The limitations of current analytical methods for predicting VIV response of riser systems are discussed. This shows that data gathering from in-service monitoring or testing at full scale is needed to improve our confidence in VIV response predictions. Full scale test and monitoring programmes with which the authors have been involved are described and some of the key findings reported. Based on this work, recommendations for monitoring VIV response are defined and alternative methods for VIV design proposed.

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