A major fabrication milestone has been achieved on the BorWin6 offshore grid connection project with the successful loadout of the offshore converter platform jacket in Jebel Ali, United Arab Emirates.
The 5,461-tonne jacket foundation, which will support the BorWin kappa offshore converter platform in the German North Sea, was safely transported, loaded out and moored by Mammoet. The structure is now secured on its transport vessel and ready for sailaway to Europe, where it will enter the next phase of the project.
BorWin6 is being developed by TenneT and delivered by McDermott International. The 980 MW high-voltage direct current (HVDC) connection will transmit offshore wind power from the German North Sea to the mainland, reinforcing grid stability and supporting Europe’s energy transition.
To support McDermott’s EPCI scope for the offshore topside and jacket, Mammoet was selected to provide jacking, transport and loadout services. For the jacket operation, the structure was moved using 216 axle lines of self-propelled modular transporters (SPMTs), powered by four power pack units, ensuring precise control during the critical quay and loadout activities. Mammoet winches were also deployed to manage safe mooring throughout the operation.
With the jacket and foundation piles now en route to Europe, attention turns to the next yard phase. In 2026, Mammoet will carry out the jack-up and weighing of the BorWin6 topside, which is expected to weigh around 17,000 tonnes. The operation will utilise Mammoet’s Mega Jack System, enabling the topside to be lifted in one piece ahead of skidded loadout and sailaway later in the year.
The latest milestone follows earlier work at the yard, where Mammoet completed the relocation of the topside module from its construction position to an interim staging area.
