Why regular ultrasonic scanning is vital for subsea flexible pipelines
By Stewart Duthie , Flexlife ?
Introduction
Subsea flexible pipelines are essential for the offshore energy industry, as they transport fluids and gases from the seabed to the surface. However, these pipelines are exposed to harsh environmental conditions and operational stresses, which can cause damage and degradation over time. This can lead to environmental issues as well as costly failures. It is crucial to monitor the condition of subsea flexible pipelines and detect any defects or anomalies before they become critical. In this article, I will discuss the importance of regular ultrasonic scanning for subsea flexible pipelines, and how the THREE60 Energy’s FlexScan? product and using our in-house expertise can help you achieve this goal.
The benefits of regular ultrasonic scanning
Ultrasonic scanning is a non-destructive testing (NDT) method that uses high-frequency sound waves to inspect the internal and external structure of subsea flexible pipelines. It can detect and measure various types of defects, such as corrosion and annulus flooding. By performing regular ultrasonic scanning you can obtain accurate and reliable data on the condition of your subsea flexible pipelines, and identify any issues that need attention. This can help you to:
THREE60 Energy’s ?FlexScan? product and Flexlife's expertise
FlexScan? is our patented ultrasonic scanning technology and is designed to inspect subsea flexible pipelines in an accurate, and cost-effective way. It is typically used to scan in fatigue critical locations providing real-time data on the annulus condition, and as required, any defect location and size. The tool is typically deployed by a remotely operated vehicle in water depths up to 3000 meters but can also be diver operated in shallower waters. FlexScan? is compatible with most subsea flexible pipelines, regardless of the manufacturer, or configuration.
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We have extensive experience in delivering ultrasonic scanning projects for subsea flexible pipelines, using the FlexScan? technology. We have a team of qualified and certified inspectors, engineers, and project managers, who can provide end-to-end solutions for your subsea integrity needs. We have successfully scanned over 500 flexible pipelines, worldwide and have developed innovative solutions for challenging scenarios, such as scanning pipelines with complex geometries, or limited access.
Regular ultrasonic scanning is vital for subsea flexible pipelines, as it can help you to monitor their condition, detect any defects, and prevent or mitigate any failures. By using the FlexScan? product and Flexlife's expertise, you can benefit from a state-of-the-art ultrasonic scanning technology and a proven track record of subsea integrity services. This can help you to extend the service life of your subsea flexible pipelines, reduce the operational and maintenance costs, enhance the safety and reliability of your subsea operations, and minimise the environmental impact.
The requirement to inspect your offshore pipelines is self-evident as the environmental and safety consequences of failure far outweigh the cost of appropriate integrity management and Risk Based Inspection.? When you then factor in the costs associated with deferred production and potentially reputational damage it is imperative that you know the condition of all your subsea infrastructure.
A Typical Use Profile
Back in 2012 Shell were looking to life extend the Brent, Alpha to Bravo flexible pipeline system.?The flexible risers were free hanging with a mid-line connection and the Bravo end suffered outer sheath damage 6m below sea level. FlexScan? was used to characterise the armour wires around the breach location and this data was then factored into the life extension assessment. FlexScan? was used regularly to trend the metallic wire condition and the pipeline continued to be safely operated until cessation of production and beyond.? It was used for decommissioning activities prior to final removal of the asset in 2021.? (UTC, 2016)
If you are interested in learning more about the FlexScan? product and Flexlife's services, please contact us at [email protected] or visit our website at: www.flexlife.co.uk