Corrosion Inhibitors in Deep Offshore Catenary Risers

Multiphase flow characteristics can be altered with a change of pipeline topography in deep offshore oil and gas production. Increasing corrosion rate and decreasing inhibitor performance in the risers can occur from changes of multiphase flow characteristics. To simulate offshore flow lines and ris...

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Bibliographic Details
Published inMaterials Performance Vol. 53; no. 1; pp. 64 - 68
Main Authors Kang, Cheolho, Rhodes, Jesse P, Tummala, Kavitha, Magalhaes, Alvaro Augusto Oliveira
Format Magazine Article Trade Publication Article
LanguageEnglish
Published Houston NACE International 01.01.2014
Subjects
Corrosion
Corrosion inhibitors
Corrosion rate
Experiments
Gas flow
Inhibition
Multiphase flow
Offshore
Offshore drilling rigs
Offshore engineering
Pipelines
Process engineering
Risers
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Summary:Multiphase flow characteristics can be altered with a change of pipeline topography in deep offshore oil and gas production. Increasing corrosion rate and decreasing inhibitor performance in the risers can occur from changes of multiphase flow characteristics. To simulate offshore flow lines and risers, experiments were carried out in a 44-m long industrial scale multiphase flow loop equipped with three different pipeline inclinations. The effectiveness of three commercial corrosion inhibitors was analyzed. The effect of inclination on the flow characteristics and their subsequent effect on corrosion rates are described. In most testing conditions, high inhibitor concentration was required to achieve the target corrosion rate.
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ISSN:0094-1492