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 Project description:
- The Ormen Lange field is in the Norwegian Sea some 120 km north west of Norway's Møre coast at a depth of 800-1100 m and will be able to meet up to 20 per cent of the UK’s gas requirement for up to 40 years.
- All equipment is on the sea bed and controlled from onshore; there is no platform or other equipment at the surface.
- The development of the Ormen Lange field,started in 2006, and is among the largest and most demanding industrial projects ever undertaken. The operator of the field is Shell.
- Ormen Lange is ready for retrofitting a DEH system, developed and qualified by Nexans in cooperation with Statoil and SINTEF. The connection points are pre-installed on the pipeline. In the event of a future decision by Shell for pipeline heating, cables and equipment for power supply can be connected using an un-manned ROV.
Challenges of the project:
- 850 metres is the greatest depth ever for DEH.
- There was a need for a solution that could be retrofitted.
- The system's installation method and concept had to be developed.
- Melting of ice plugs.
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Nexans' solution:
- Fully-qualified DEH system for retrofitting.
- ROV-friendly connection between high-voltage cable and pipeline (patented solution).
- Patented cable design for this and greater depths of water.
- New concept for installation, operation and removal of the system.
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