Rapid ILI Fitness-for-Service Assessment

Overview

Our team build tools to perform fitness for service assessments(B31G/DNVF101) and rapidly assess In‑Line‑Inspection (ILI) data to ensure the correctly prioritization of remediation/repair resources.

Challenge

The client, an oil and gas company, has a large number of pipelines that are routinely inspected for corrosion defects viaIn-Line-Inspection (Smart pigging). These inspections resulted in a very large number of indications within the pipeline network that needed to be assessed to determine if they were fit for service and the next required inspection interval.

Solution

The BKOAI team collaborated with the site-based team to build several assessment tools that perform a first pass assessment of all the indications directly from the ILI inspection reports. These tools were specific to the different pipeline designs and their specific loading conditions. These tools were able to address >90% of the indications with minimal engineering hours and highlighting the most critical indications for further detailed assessments. Additionally, we developed a methodology for assessing the measurement errors associated with the ILI tools that this operator was utilizing and provided the ability for direct measurements of the indications to be entered from in-trench measurements to provide an updated inspection interval quickly once the indications were day lighted.

Key Benefits

• Rapid assessment of hundreds of ILI indications to allowing for correct prioritization.
• A consistent FFS approach that was applied to all pipelines for each design.
• A tool that could provide guidance to field crews as excavations were performed to determine if measurement uncertainty was detriment for remediation recommendations.

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