DOI

A flexible riser is a flexible pipe that transports materials between seafloor and topside structures. As oil and gas production heads to water depths greater than 3000 meters, huge hydrostatic pressure may cause the collapse failure of flexible risers. Generally, the collapse strength of a flexible riser is designed by considering the effects of initial imperfections, e.g., ovality of the carcass, and radial gap between the carcass/liner and pressure armor. These two imperfections may cause a significant reduction in the collapse strength of flexible risers under the flooded annulus condition. However, there are few analytical models available in the public literature that could take those factors into account. In this paper, an analytical approach is presented to predict the critical collapse pressure of the flexible risers with initial imperfections. The analytical results were compared with the numerical simulation, which showed reasonably good agreement.
Original languageEnglish
Title of host publicationProceedings of the ASME 38th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2019)
Subtitle of host publicationVolume 5A: Pipelines, Risers, and Subsea Systems
Place of PublicationNew York, NY, USA
PublisherASME
Number of pages8
ISBN (Print)978-0-7918-5880-6
DOIs
Publication statusPublished - 2019
EventASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019 - Glasgow, United Kingdom
Duration: 9 Jun 201914 Jun 2019

Conference

ConferenceASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019
CountryUnited Kingdom
CityGlasgow
Period9/06/1914/06/19

    Research areas

  • collapse strength, flexible risers, initial ovality, radial gap

ID: 57274333