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DEME and Herrenknecht ink drill agreement

By: Tom Russell 12/02/2020 DEME Group

General Vessels Windfarms

DEME Offshore and Herrenknecht have signed an agreement for the fabrication of a subsea drill to be deployed at the Saint-Nazaire offshore wind farm in France. This is the first wind farm in the world to use drilled XL-monopile foundations.

In 2019, a consortium including DEME Offshore and Eiffage Métal was awarded an Engineering, Procurement, Construction, Installation (EPCI) contract for 80 foundations for the French wind farm. The scope includes the design, fabrication, transportation and installation of the steel foundations.

The XL-monopile foundations have to be installed on a rocky seabed. DEME Offshore and Herrenknecht are fabricating an innovative tailormade subsea drill specifically for the project. The subsea drill will be deployed from DEME Offshore’s installation vessel Innovation.

“Installing drilled XL-monopiles is a new step forward in the offshore wind industry,” says Bart De Poorter, General Manager DEME Offshore. “With this innovative solution, developed in partnership with Herrenknecht, we ensure that the installation is performed safely and efficiently in challenging marine conditions.”

“The Offshore Foundation Drilling (OFD) enables mechanised installation of monopiles, thus providing ecological and economic advantages compared to conventional methods”, says Ulrich Schaffhauser, Member of the Board of Management of Herrenknecht AG. “We are proud, that DEME relies on Herrenknecht’s solution, expertise and know-how in the field of excavation technology. The project teams of DEME and Herrenknecht cooperated very well, now we all are looking forward to project realisation.”

The 480 MW Saint-Nazaire offshore wind farm will be located between 12 km and 20 km off the coast of the Guerande peninsula in western France. Water depths at the site range between 12 and 25 metres. The project is expected to generate enough electricity to supply 20% of the Loire-Atlantique department's power. It being developed by Eolien Maritime France (EMF), a project company co-owned by EDF Energies Nouvelles Group and Enbridge.

For more information on offshore wind farms development, click here. Alternatively, you can view projects across the globe using 4C Offshore's interactive map.

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DEME and Herrenknecht ink drill agreement

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