The definition of a riser is a single or a series of tubes connecting the sea floor to a facility at the sea surface. Production risers transport oil or gas to the production platform, often spaced in an array. Traditionally, steel or titanium materials were used for risers, but currently there are many attempts to replace these materials with composite materials. Composite materials have lower density and higher strength to weight ratio. The greatest benefit of using composite materials is that they enable us to explore deeper water, due to the reduced weight. The main objective of this research is to perform both extreme and fatigue analyses for a production riser system. For comparisons with the already published results, the global analyses of risers made of an isotropic material are undertaken first. The global analyses of the composite risers are carried out with their orthotropic effective properties. From the global analyses results, locations of interest are identified, and detailed layer-by-layer local analyses at these locations follow the global analyses.

Quasi-Static Analysis of Risers Presentation