The problem We were asked to dene a region-wide maintenance pigging strategy for a major operator. The scope involved ensuring the capability to carry out this strategy was in place for the pigging of ve ultra- deepwater production lines at two FPSOs in West Africa, including multi-diameter owlines, exible pipe sections and passage of wyes. The solution We reviewed the process data and principal threats associated with each line (wax, sand, asphaltenes etc.) and produced a region-wide cleaning strategy detailing the types of pigs that would be required to remove the potential debris types from each line, as well as the recommended maintenance pigging frequency. We subsequently generated an SoR for each FPSO, detailing the requirements for the cleaning and de-sanding pigs required at ea

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