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96049 INTELLIGENT PIGGING : POLICY, RECENT EXPERIENCE AND NEEDS OF A PETROLEUM OPERATOR

Picture for 96049 INTELLIGENT PIGGING : POLICY, RECENT
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Product Number: 51300-96049-SG
ISBN: 96049 1996 CP
Author: M.G. Roche, M.R. Bonis, P. Tobiassen, D. MacLeod, A.E. Pedersen
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On-line inspection of pipelines using intelligent pigs constitutes a major aspect of corrosion control programs. The policy established by a petroleum operator is presented. It defines when base-line and early inspection surveys are considered necessary. The paper discusses the pros and cons of intelligent pigging operations and gives guidelines for deciding when to run in-service inspections to assess the condition of a pipeline and to verify the efficiency of corrosion control measures on a long term basis. H highlights factors like the estimated maximum corrosion rate, the positive change of actual corrosion allowance with time and the detection limits by the selected intelligent pigs. In the second part, a recent experience concerning the base-line survey of the Lille-Frigg 10“ wet gas production pipeline in the North Sea using an ultrasonic pig is presented. The inlet of this pipeline is situated at a subsea manifold. The third part of the paper discusses aspects of intelligent pigging where difficulties are found and where improvements or new technological developments are needed. Keywords: intelligent pigs, on-line inspection, pipelines, CO2 corrosion, subsea manifold, corrosion control program, base-line survey, early inspection suwey, condition assessment sutvey, ultrasonic pigs.
On-line inspection of pipelines using intelligent pigs constitutes a major aspect of corrosion control programs. The policy established by a petroleum operator is presented. It defines when base-line and early inspection surveys are considered necessary. The paper discusses the pros and cons of intelligent pigging operations and gives guidelines for deciding when to run in-service inspections to assess the condition of a pipeline and to verify the efficiency of corrosion control measures on a long term basis. H highlights factors like the estimated maximum corrosion rate, the positive change of actual corrosion allowance with time and the detection limits by the selected intelligent pigs. In the second part, a recent experience concerning the base-line survey of the Lille-Frigg 10“ wet gas production pipeline in the North Sea using an ultrasonic pig is presented. The inlet of this pipeline is situated at a subsea manifold. The third part of the paper discusses aspects of intelligent pigging where difficulties are found and where improvements or new technological developments are needed. Keywords: intelligent pigs, on-line inspection, pipelines, CO2 corrosion, subsea manifold, corrosion control program, base-line survey, early inspection suwey, condition assessment sutvey, ultrasonic pigs.
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