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Root-Cause Analysis of Offshore Pipeline Failures

Topics: Flow assurance

This paper evaluates potential causes of failure for nine pipelines operating in shallow waters (8 to 14 m) in the Gulf of Guinea. The authors develop an analytical method to identify root causes and provide recommendations for pipeline design and placement.

Methodology

Once the subject pipelines had been identified, field visits and failed-section analyses were conducted. Pipeline properties and conditions are provided in Tables 1 through 5 of the complete paper. Mechanical-failure, hydrodynamic, and third-party-interference assessments were performed. Design-stability assessment was reviewed and gaps identified. A further stability assessment of the pipelines was performed in accordance with Det Norske Veritas-Germanischer Lloyd Recommended Practice (DNVGL-RP) F109. The authors then developed the best remedial option by use of a scoring matrix based on weighting with respect to business drivers.

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 188717, “Offshore-Pipeline-Failure Root-Cause Analysis,” by Emmanuel Iyeh, SPE, Addax Petroleum, and Grant Adams, JEE Subsea, prepared for the 2017 Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, 13–16 November. The paper has not been peer reviewed.
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Root-Cause Analysis of Offshore Pipeline Failures

01 November 2018

Volume: 70 | Issue: 11

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