Marine engineering firm Jan De Nul Group Jan De Nul Group has completed the installation and burial of the two main subsea umbilicals for the exploitation of new gas fields in the West Nile Delta concessions, located in the North Alexandria region, offshore Egypt.
According to the company release, specifically for this project, Jan De Nul Group reconfigured its multi-purpose vessel Willem de Vlamingh into an efficient Umbilical Installation Vessel.
The two umbilicals, with a total length of 69 km, were loaded in Norway in May 2018 and transported to Egypt. The installation campaign started with a 3-km beach pull for which the Willem de Vlamingh positioned in water depths of 7 m. Water depths significantly increased along the route.
The campaign was finalized early August 2018 with the installation of the Umbilical Termination Assembly at 600 meters water depth.
Installation and burial were performed in parallel to safeguard the critical main umbilical. Willem de Vlamingh installed the umbilical onto the seabed, directly followed by Isaac Newton for simultaneous burying of the umbilical using the jet trenching method.