Projects

Eddyfi study - alternative non-intrusive inspection method could save up to £242 million per year

Process vessel inspection is a major cause of production downtime and incurs significant cost to industry. The OGTC collaborated with Total to support the field trial of three non-intrusive inspection (NII) technologies as an alternative inspection method. Total identified two process pressure vessels on its Elgin Franklin platform that were scheduled for traditional intrusive inspection. However in advance of this, they agreed to a NII field trial being carried out while the vessels were online and operational, allowing the results of both approaches to be compared and verified. Three technology providers were selected to conduct the field trials, and deployed a range of ultrasonic corrosion mapping and time of flight diffraction solutions. Each company was given the brief to develop a Non-Intrusive Inspection plan using industry standard DNV Recommended Practice G103. The aim of this was to meet the requirements of a full intrusive inspection without vessel entry.

Industry Value

Overall, the value of non-intrusive inspections (NII) to the industry has been calculated to be in the region of £242 million per annum. This project helps leverage this cost saving by providing an attractive technology which further enables the adoption of NII.

Technology Organisation

Eddyfi

Eddyfi was established with the goal of pursuing and developing eddy current array (ECA) technology to its full potential.

https://www.eddyfi.com/

ProjectEddyfi - Non-Intrusive Vessel Inspection

Challenge

Asset Integrity

Vision

Maximise Recovery

Entry TRL

6

Field Trial

Completed

Technology

Non-Intrusive Vessel Inspection

Type

Adopt

Achieved TRL

8

Technology Organisation

Eddyfi

Eddyfi was established with the goal of pursuing and developing eddy current array (ECA) technology to its full potential.

https://www.eddyfi.com/

Key Results

Eddyfi in conjunction with their sub-contractor (CAN) used their:
- Phased array corrosion mapping
- TOFD (time-of-flight diffraction) weld scanning
- Manual ultrasonic inspection
- PEC inspection through PFP on vessel skirt base

Their assessment concluded there was some degradation noted on both vessels and defect detection was at least as good as an intrusive inspection.

This alternative inspection technique was proven to reduce risk associated with confined entry, while optimising production efficiency - reducing the need for shut downs.

Lessons Learned

The OGTC and Total were commended by industry for their collaboration and won the Maximising Economic Recovery (MER) UK 2017 Award for their work on the trials.

Next steps: in line with the UKCS MER strategy, The OGTC and ABB then carried out a landscaping study to establish the use of NII technology across the UKCS and the potential wider application.

Next Steps

The EDRIS is fully ready for normal field deployment and can be used on any NII where man entry is either impossible or to be avoided for entry to the skirt of a vessel.