Decom North Sea (DNS) is working with Zero Waste Scotland (ZWS) and subsea engineering firm Jee on a mattress decommissioning research project.
Under the project, the expert engineers of DNS and Jee will work with the oil and gas industry’s operators and suppliers to carry out economic, as well as environmental assessment of the condition of the mattresses, and find the best techniques for their recovery.
Jee said concrete mattresses offer pipelines, cables and umbilicals with protection from dropped objects, and add weight as well as stabilisation.
The analysis of Jee will find the potential reuse and circular economy applications for the mattresses and develop guidance on best practice for recovery and important points for derogation cases to leave in situ.
Jee will examine solutions for the recovery of concrete subsea mattresses and subsequent re-use. DNS plans to unveil the results of the project later in 2015.
Jee senior engineer Dean Kirby said: "Millions of pounds are being spent on UKCS decommissioning each year, and this will continue for several decades.
"As with the majority of decommissioning projects, the recovery and disposal of subsea mattresses presents a significant obstacle and financial burden to operators and contractors globally.
"There is a need for a safe, quick and cost-effective system for mattress removal, and at Jee we strive to identify and develop the best solutions for the industry."
Image: Jee will examine solutions for the recovery of concrete subsea mattresses and subsequent re-use. Photo: courtesy of Jee Limited.