Exploration • Drilling • Field Services
Robert A Walters reports on an innovative subsea pipeline rehabilitation system.
Robert A Walters informa sobre un innovador sistema de rehabilitación de tuberías submarinas.
Robert A. Walters berichtet über ein innovatives System zur Pipelinesanierung unter Wasser.
The rise of a need P
Fig. 1. The liner is launched from vessels. IFL can be utilised for the rehabilitation of an existing sub-sea pipeline where it is desirable to extend the service life of the pipeline beyond the period of operation for which it was originally designed.
etronas Carigali (PCSB) is the owner and operator of an extensive network of sub-sea pipelines that are situated offshore from main land
Malaysia, in the South China Seas. Many of these pipelines run from platform- to-platform and platform-to-onshore facilities over distances of between several hundred metres to several kilometres, in varying water depths. Internal corrosion, due in large part to sulphate reducing bacteria (SRB) can cause the pipelines to have a relatively short life cycle, which has historically resulted in the replacement of pipelines becoming necessary within a time period as short as four years. Tus far, there has not been a viable methodology that could be utilised to install such a corrosion barrier to within a sub-sea pipeline, therefore a project for the design and development of Infield Liners (IFL) was instigated. Te project
began in April 2011 and operating under the joint management of Petronas and Anticorrosion Protective Systems. Te IFL research and development
project was aimed at realising the primary objective of developing the materials and technologies necessary to successfully implement the installation of plastic liners to existing and new sub-sea carbon steel pipelines being operated by PCSB and other Petronas companies, for the conveyance of corrosive hydrocarbon media, where SRB is one of the principal sources of corrosion activity. Te IFL liner will protect the internal pipe bore from corrosion of any kind and will also offer a secondary containment capability in the event of a rupture or damage to the outer steel pipeline. Te project start point has been the testing and qualification of an existing nominal 8in Kevlar-reinforced plastic liner product, which is produced and manufactured for the utility market
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