A Numerical Modeling Approach of Composite Riser Hoses

Amaechi, Chiemela Victor and Ye, Jianqiao (2017) A Numerical Modeling Approach of Composite Riser Hoses. In: Lancaster University FST Christmas Conference 2017, 2017-12-19 - 2017-12-19, Lancaster University.

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Abstract

The current demand for the oil and gas has led to an increase in more technological advancements. Also, this trend has made offshore explorations to move from shallow waters to deep waters. This requires longer risers, resulting in significant weight increase. To improve riser technology, composite materials can be used. They offer advantages that can be harnessed. However, due to the recent drop in oil prices, riser hoses are being deployed, because they are cost effective, though have shorter service life. This paper presents a brief overview on the progress made in the research activities on composite risers and hoses. For instance, the first time composite risers were successfully deployed offshore was on Heidrun Platform in 1995 as a composite joint. In my research, the riser hoses were designed using ANSYS AQWA 17.2 for the hydrostatics and RAOs and then the dynamic analysis was solved using Orcaflex in Chinese-lantern and Lazy-S configurations. In this research, the hydrodynamic loads are also looked at with; also different load conditions with parametric studies of the hoses, when connected to a CALM buoy for three environmental conditions. Lastly, the material development and lay-up configurations used in the modelling approach were presented. Composite materials properties used like AS4/PEEK were also presented with their advantages for applications in deep waters of over 1000m depth. The study also showed the structural behaviour of submarine hoses for different cases, and recommendations were made for designers and manufacturers of these hoses.