A method of pigging a pipeline network (4,6) connecting a host facility (1) to a remote location (2), the network including a delivery pipeline (4) for transporting a first fluid from the host facility (1) to the remote location (2) and a return pipeline (6) for transporting a second fluid from the remote location (2) to the host facility (1), the method comprising the steps of: (I) propelling a pig (24) with a first fluid along the delivery pipeline (4) to the remote location (2); (ii) capturing the pig (24) in a pig trap (42) situated in a pig transfer pipe (20) connecting the delivery and return pipelines (4,6); (iii) diverting the second fluid to propel the pig (24) out of the pig trap (42) and around the transfer pipe (20) into the return pipeline (6); and (iv) propelling the pig (24) with the second fluid along the return pipeline (6) to the host facility (1).
申请公布号
WO0244601(A3)
申请公布日期
2002.09.12
申请号
WO2001GB05261
申请日期
2001.11.29
申请人
ALPHA THAMES LTD;APPLEFORD, DAVID, ERIC;LANE, BRIAN, WILLIAM;SMITH, RONALD, GEOFFREY, WILLIAM
发明人
APPLEFORD, DAVID, ERIC;LANE, BRIAN, WILLIAM;SMITH, RONALD, GEOFFREY, WILLIAM