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51313-02824-Corrosion Mechanism in a Three-Phase North Slope Pipeline

Product Number: 51313-02824-SG
ISBN: 02824 2013 CP
Author: Probjot Singh
Publication Date: 2013
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$20.00
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A North Slope of Alaska facility separates three-phase flow (produced water oil and natural gas) from four drill sites. Each of the drill sites has a three-phase production line that flows to the central facility. One of the three-phase pipelines was inspected by a magnetic flux leakage (MFL) in-line inspection (ILI) tool in 2008. The inspection showed significant internal corrosion with features measured up to 37% of wall thickness loss primarily in first 1 mile from the drill site. Most of the severely corroded features are located between 3-4 o’clock and 8-9 o’clock. The results of a 2008 MFL ILI corrosion inhibitor partitioning tests corrosion modeling and OLGA® simulations were used to determine the corrosion mechanism in the line and to recommend corrosion control measures. The mechanism was determined to be a type of “top of the line corrosion”.

A North Slope of Alaska facility separates three-phase flow (produced water oil and natural gas) from four drill sites. Each of the drill sites has a three-phase production line that flows to the central facility. One of the three-phase pipelines was inspected by a magnetic flux leakage (MFL) in-line inspection (ILI) tool in 2008. The inspection showed significant internal corrosion with features measured up to 37% of wall thickness loss primarily in first 1 mile from the drill site. Most of the severely corroded features are located between 3-4 o’clock and 8-9 o’clock. The results of a 2008 MFL ILI corrosion inhibitor partitioning tests corrosion modeling and OLGA® simulations were used to determine the corrosion mechanism in the line and to recommend corrosion control measures. The mechanism was determined to be a type of “top of the line corrosion”.

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