Don Field Decommissioning Programme (pdf, 7.8MB) null - BP

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DON-BP-001Don Field Decommissioning ProgrammeNote: Pipelines and umbilicals are shown untrenched for clarity.Figure 10.5 Don Field Pipeline System LayoutFigure 10.6 Lines at Don ManifoldPipelines10-6 May 2011
Don Field Decommissioning ProgrammeDON-BP-001Figure 10.7 Pipebridge at Thistle3.2 8in Oil Production Pipeline (PL598)The 8in oil production pipeline between Thistle and the Don manifold, as shown inFigure 10.8, is 17.4km long and was designed to be trenched and buried. Stabilisationfeatures include flexiweight mattresses, grout formworks, grout bags, rock dumpand supports.The pipeline has been made hydrocarbon free, cleaned to less than 10ppm Oil-in-Water(OiW) and filled with inhibited seawater at ambient pressure. The pipeline has beenisolated at the Thistle topsides. The pipeline has remained trenched and is buried over98.5% of its length. There are no spanning concerns and there have been no FishSafespans since installation in 1988.The secure soil and low seabed currents provide a stable environment in which exposureor span development is not expected. Further details on the integrity of the pipeline aregiven in Paragraph 5.4.PipelinesMay 2011 10-7
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Executive SummaryMay 2011 2-5Table
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Descriptions of Items to be Decommi
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Don Field Decommissioning Programme (pdf, 7.8MB) null - BP

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