Ormen Lange – oil & gas

250 000 meters of MEG lines and umbilicals were to be protected during the 2006 and 2007 period.

Project description

• Protection of 6” MEG-lines (Ethylene glycol) and umbilicals, from Nyhavna to the Ormen Lange field.

Project challenges

• Water depth was down to 850 meters over a distance of 250 km with a burial depth of 1.5 meters.
• Trenching had to be performed at angles between 15 and 25 degrees.  
• The umbilical was unarmored and vulnerable with respect to coating damage.   
   

Nexans' solution: The Nexans Capjet ® system performed all burial in order to protect the MEG-lines and umbilicals from trawlers and anchors. Several special systems were developed to meet the challenges, notably the steep terrain with sideslopes. The Capjet also performed dredging of the MEG lines to 2 m in rock support. Later the Capjet also trenched an extension - in the Ormen Lange Southern field.