51314-3756-Revolutionary Non-metallic Liners to Rehabilitate the Aged/Corroded Carbon Steel Water Injection Laterals

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Product Number: 51314-3756-SG

ISBN: 3756 2014 CP

Author: Jeff Schell

Publication Date: 2014

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A permanent solution to an internally corroded pipeline is to actively managing all corrosion issues i.e. preventing the pipeline from failing before doing something about it and this may include the use of inhibitors frequently pig the corroded pipeline to monitor the state of internal corrosion. Both associated solution means higher maintenance cost. Using thermoplastic liners is always considered as a simple and permanent long term solution without the cost of inhibitors and monitoring system.Internal lining with grooved High Density Polyethylene(PE100) liner to rehabilitate existing carbon steel pipelines provides an effective barrier against further corrosion and deliver a significant life extension of at least 30 year. The concept of the liner is that it needs to fit tightly inside the host carbon steel pipe and act as a continuous corrosion barrier between the aggressive fluid and the internal surface of the bare pipeline. Generally statistics have shown that non-metallic solutions and in this case the use of grooved liner results in 30% cost saving over the life cycle of a pipeline operating in corrosive environment. Complete replacement of metallic pipelines is costly and time consuming. Moreover this solution is also a temporary one as corrosion will start once the environment inside the new pipeline is aggressive enough to start corrosion again.Lining is a low risk highly effective operating system in terms of its proven technology even in subsea pipelines as it results in significant reduction in pipeline system downtime with 100% certainty of no future leakage or spills.This paper details the use of High Density Polyethylene (PE 100) internally grooved thermoplastic liner to rehabilitate existing aged/corroded carbon steel water injection laterals. It will also discuss the lessons learned during the design and implementation phases of the internal lining. Cutting-edge technologies are always needed to continue improving the performance of Oil and Gas facilities and their implementations have made a big difference in their operation.