Lessons Learned from Flexible Risers Fatigue Exceedance, followed by Offshore Retermination and Dissection

Event:
Lessons Learned from Flexible Risers Fatigue Exceedance, followed by Offshore Retermination and Dissection
Date:
April 2021
Author:
Pedro Viana, Asad Khalid - 2H, Mehrdad Mansour - Tullow

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.

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