Exploration • Drilling • Field Services
by a German company, Raedlinger. Its attributes include: high tensile and good physical properties; moderate chemical resistance; a high degree of flexibility; and the ability to be manufactured and spooled in long lengths.
Te qualification of the liner has been generally undertaken in accordance with the API Recommended Practice 15S (First Edition March 2006) “Qualification of Spoolable Reinforced Plastic Line Pipe”, with further reference to the applicable ASTM test standards, API 17 series and Nace standards. Te testing and qualification procedures have been undertaken in a number of locations including Germany and Norway. Te final enhanced IFL Liner matrix comprises of a solvay Solexis PVDF inner liner, a tightly woven Aramid core, using Dupont Kevlar fabric, with an outer layer of abrasive resistant Termoplastic Polyurethane from BASF. Other versions of the liner are also available for less aggressive service conditions, such as water reinjection and gas transmission. Performance testing has been undertaken that has been able to
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completely justify the utilisation of the liner in very aggressive, hot, sour hydrocarbon service conditions of up to 120 degrees centigrade, with the liner exhibiting a stand-alone burst capability of up to 120 Bar.
Te majority of sub-sea pipelines are
constructed from carbon steel, laid by barge lay, during which single or double random joints of steel pipe are welded together on the deck of the barge and gravity laid onto the seabed IFL can be used when unforeseen operational parameters such as CO2
or
SRB corrosion have caused the pipeline to reach the end of its useful life ahead of the originally intended schedule. Te insertion of an IFL liner into a
defective pipeline is perceived as being a process of a far lesser magnitude in terms of planning, implementation and expense. It may well be possible (in terms of project turn-around) to achieve with IFL in weeks, what may otherwise take months or even years, with conventional pipe lay replacement, especially if the necessary pipe-lay barges for conventional barge lay are not located in the region. l
Fig. 2. The liner IFL can be used when unforeseen operational parameters such as CO2
or SRB corrosion
have caused the pipeline to reach the end of its useful life ahead of the originally intended schedule.
Robert A Walters, IFL’s global project director, is based in St Helier, Jersey.
http://infieldliner.com
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