The operation was carried out on the 24 inch diameter gas pipeline that links the Trent Platform with the Bacton Terminal pipeline. T.D. Williamson (TDW) conducted this intelligent inspection and associated pipeline service operation as part of Perenco’s strategic programme to ensure the integrity of its pipelines and assets.
TDW provided a sales, customer services, and project management team tasked with identifying and responding to Perenco’s precise needs. Following site visits, a comprehensive plan was devised, which included progressive pigging, KALIPER 360 geometry inspection, a 24 inch diameter magnetic-flux leakage inspection, in-line inspection (ILI) reporting, fitness-for-purpose, run comparison, corrosion growth analysis reports, and other services.
In spite of working in high winds, driving rain, sleet and snow, the offshore phase, during which all site work was carried out, was completed in just 23 days. Support and equipment were supplied by the TDW operations and projects team based at the company’s facility in Swindon, England.
The ILI run – from launch to trap – was achieved in less than 21 hours. No metallic components were brought in, and only a small quantity of viscous black residue was produced. The gauge plate showed no signs of any deflection at any point around its circumference.
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The tool displaced approximately 100 t of liquid from the pipeline. As benzene levels were high, the tool was left by the trap overnight to allow it to disperse. Upon further examination of the tool, the polyurethane components were found to be in a good condition with only a small amount of wear to the cups.
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