BACKGROUND An operator in the North Sea has a number of temporarily suspended tieback wells that were drilled in the 1990s and have suffered from loss of centralisation at various conductor guide locations. Due to a fatigue failure of one of the tieback conductors and others having experienced similar operational histories, 2H was tasked with assessing the effectiveness of remedial action and likelihood of future failures. The remedial action took the form of re-centralising the conductor, which was performed by the operator after the conductor failure. SOLUTION To determine the accumulated fatigue damage for the failed well conductor and other similar tieback conductors at risk of failure, we performed fatigue analysis for a range of centralisation scenarios. The fatigue damage

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