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51312-01098-BENEFICIAL EFFECTS OF CHEMICAL TREATMENT AND MAINTENANCE PIGGING PROGRAMS IN RETURNING PIPELINE TO P

Product Number: 51312-01098-SG
ISBN: 01098 2012 CP
Author: Daniel E. Powell
Publication Date: 2012
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$20.00
$20.00
When Hurricane Ike crossed the Gulf of Mexico in September 2008 one of the major laterals in an offshore gathering system was ripped from the trunkline. As a consequence of that breach approximately 75000 BBL (11.9 MM liters) of seawater entered the trunkline and approximately 40000 BBL (6.4 MM liters) of seawater entered the lateral. A previous paper (10064) described the repairs the high levels of hydrogen sulfide (H2S) that were generated by microbiological activity the monitoring program and the chemical treatment and maintenance pigging programs which were implemented to re-establish control over the SRBs and the H2S they generated. This paper is a follow up to that report and describes the removal of sand from the pipeline which continued through December 2010 as well as the cleaning and removal of that sand which had accumulated within the slug catcher. This paper also presents results from destructive metallurgical examination of a “hot tap coupon” obtained from the trunkline when a new tie was made to the trunkline in 2010. It appears that the pipeline has been returned to the operating conditions that existed prior to the passage of Hurricane Ike. KEY WORDS: Pipeline Integrity Internal Corrosion Microbiologically Influenced Corrosion MIC Sulfate Reducing Bacteria SRB Hydrogen Sulfide H2S THPS Glutaraldehyde Biocide Scavenger Inhibitors Pigging Subsea Gulf of Mexico Hurricane Ike Seawater Sand
When Hurricane Ike crossed the Gulf of Mexico in September 2008 one of the major laterals in an offshore gathering system was ripped from the trunkline. As a consequence of that breach approximately 75000 BBL (11.9 MM liters) of seawater entered the trunkline and approximately 40000 BBL (6.4 MM liters) of seawater entered the lateral. A previous paper (10064) described the repairs the high levels of hydrogen sulfide (H2S) that were generated by microbiological activity the monitoring program and the chemical treatment and maintenance pigging programs which were implemented to re-establish control over the SRBs and the H2S they generated. This paper is a follow up to that report and describes the removal of sand from the pipeline which continued through December 2010 as well as the cleaning and removal of that sand which had accumulated within the slug catcher. This paper also presents results from destructive metallurgical examination of a “hot tap coupon” obtained from the trunkline when a new tie was made to the trunkline in 2010. It appears that the pipeline has been returned to the operating conditions that existed prior to the passage of Hurricane Ike. KEY WORDS: Pipeline Integrity Internal Corrosion Microbiologically Influenced Corrosion MIC Sulfate Reducing Bacteria SRB Hydrogen Sulfide H2S THPS Glutaraldehyde Biocide Scavenger Inhibitors Pigging Subsea Gulf of Mexico Hurricane Ike Seawater Sand
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