Case Study: Inspection of non-piggable pipeline for lifetime extension The scope Jee’s client was operating a multi-phase oil production pipeline system beyond its original design life and therefore required an in-line inspection (ILI) to be carried out to verify the condition and conrm suitability for continued and safe operation. The pipeline was designed without pigging facilities and had subsequently never been in-line inspected during operation. Our initial scope was to review the pipeline cleaning and inspection philosophy to ensure the pigging operation was appropriate for the pipeline design and inspection requirements. During early stages of project planning, decommissioning of an associated tie-in well spool showed hardened barium sulphate scale deposition in the spool.

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