Lessons Learned from Flexible Risers Fatigue Exceedance, followed by Offshore Retermination and Dissection
EVENT: MCEDD
1 Apr 2021
This presentation covers the following:
Field and risers description – Jubilee Field , offshore West Africa
Causes of Fatigue exceedance
Revised MetOcean data
Turret seizer
Fatigue analysis – overview, key results and risks identified
Inspection and control prior mitigation
Mitigation execution – Riser re-termination and retrofit spread-mooring of the vessel
Inspection of the recovered section
Learning from the dissection and testing of recovered sections.
Validation of the pre-analysis based on the assessment of recovered sections
Closing statement and conclusions
Authors
Pedro Viana
Flexible Engineering Manager
About
Pedro was the first employee hired by 2H in Brazil, in January 2004, after graduating from PUC-Rio (Catholic University of Rio de Janeiro). His mechanical engineering studies included 1 year at the Technical University of Munich, Germany, with a dual-country scholarship granted to the best Brazilian engineers. Over the years, Pedro spent various periods of up to 9 months working in projects in 2H US, MY and UK offices, having gathered experience in all major offshore O&G regions. He has been based in the 2H Woking office since 2014, is part of the Local Management Team and leads the global flexible riser business within 2H.
Pedro’s 19 years’ experience ranges from shallow to deepwater risers, from concept design, through to integrity management and life extension and encompasses in particular flexible, rigid and hybrid riser production systems. He has worked on some major 2H projects such as Petrobras P-52, P-55, Guará&Lula-NE, BP Block31 PSVM, BP Tortue, and Total Kaombo, and is a long term sponsor of comprehensive engineering support on Tullow TEN and Jubilee and consultant on various key flexible projects across the 2H globe. Pedro is also part of the API 17J&B (flexibles) Task Group and one of the individual work group leaders.
From concept to installation. Has worked in 2H offices in BR, US, MY and UK, having gathered experience in all major offshore O&G regions.
Insights
Asad Khalid
Principal Engineer
Asad Khalid
Principal Engineer
Mehrdad Mansour
Subsea Engineering Manager, Tullow Oil