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

DON-BP-001Don Field Decommissioning Programme(2) IN03 was originally connected to the Don manifold using a 4in rigidflowline jumper, which was replaced by a 4in flexible flowline jumper in1993. Vertical sections of the rigid flowline were recovered and thehorizontal section covered by flexiweight mattresses. The remaininghorizontal section, flexible and rigid tie-in pipes, and flexiweightmattresses will be removed.The replacement 4in flexible flowline jumper is disconnected at thewellhead and at the manifold.(3) Following trawler damage in 2000 [5.2], the serviceable PN05 4inproduction flowline jumper was disconnected from the shut-in well PN05and connected to PN06 from the Don manifold and became known asPL1073. The original damaged 4in production flowline jumper PL1073became known as PL981 and was removed to shore for disposal.4 Materials on the SeabedCuttings were originally generated through drilling. A full quantitative and qualitativesurvey, performed in 1999 [5.3], estimated that the total drill cuttings volume was1763m 3 spread over a large area (47,745m 2 ).5 References[5.1] Don Pipeline System Decommissioning Technical Report, Lloyd’s RegisterEMEA, Ref No R-658-40621-1B, July 2005.[5.2] Don Field Trawl Damage Repair As-built Report, Stolt Offshore, Ref NoRE-ENG-397-303.[5.3] Don Cuttings Environmental Survey UKCS 211/18, Gardline Surveys, 5353.01,July 1999.Inventory of Materials5-4 May 2011