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

Don Field Decommissioning ProgrammeDON-BP-001A pulling head is attached to the end of the pipeline or umbilical for attachment of theabandonment and recovery cable. As the vessel moves backwards, the pipeline orumbilical is fed back and reeled on to the main reel. Once a line is fully recovered ontothe reel, or the maximum reel capacity is reached, the vessel may proceed to shorewhere the line can be reeled off and cut into convenient lengths for recycling.2.2.2 Full Recovery by Reverse S-lay or J-layThe reverse S-lay and J-lay processes are shown in Figures 10.2 and 10.3, respectively.Figure 10.2 Reverse S-lay MethodFigure 10.3 Reverse J-lay MethodPipelinesMay 2011 10-3