Presentation of pipeline cleaning objectives and philosophy with detail of each cleaning and sequencing concept Structured discussion and brain-storm of benets, issues and operational complexities associated with each option, including uid disposal and sequencing requirements considering COP of currently operational pipelines Case Study: Pipeline cleaning sequencing for decommissioning The problem Centrica E&P were planning the decommissioning process for the A-elds area comprising of 3 xed platforms, 7 subsea structures and 20 pipelines and umbilicals. Jee was contracted to assess the options for ushing, pigging and conditioning of the pipeline infrastructure and to advise an optimised base case cleaning methodology to be taken forward to the detailed engineering phase. The solu

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