Installation of Inter-Array Cables and Backfilling Using Recycled Material at the Fécamp Offshore Wind Farm by Asso.subsea.

Written by Paulo Nogueira

Published on 15/12/2023 at 14:49

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Asso.subsea Completes Inter-Array Cable Protection for Fécamp Offshore Wind Farms Using Different Vessels and Subsea Tools.

The 500 megawatt (MW) offshore wind project in Fécamp, on the coast of France, saw the installation and protection operations of inter-array cables completed by Asso.subsea, according to the company’s announcement. The preparation, installation, and seabed protection work was carried out by Asso.subsea, contracted by Prysmian Group, involving four different vessels and various subsea tools from the extensive company portfolio.

The Offshore Wind Projects Director at Asso.subsea, Dimitris Panagos, highlighted the importance of the project, stating that ‘this important project represents a significant milestone for Asso.subsea, being the first inter-array project the company has executed.’ He emphasized that the company successfully installed and protected a total of 71 cables, responsible for loading, transporting, installing, protecting, and burying over 118 km of subsea cables, thanks to its experience and extensive capability to execute an extremely complex project, providing a fully vertically integrated solution.

Offshore Wind Farm Challenges

Asso.subsea stated that the project was characterized by very hard soils and demanding burial requirements, which is why it designed and built a new trenching vehicle, the AssoTrencher IV Mk13, with an innovative approach to enhance the filling capabilities. This tool successfully completed over 100 kilometers of backfilling by reusing the previously excavated material.

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Offshore Wind Farm Operations

Asso.subsea indicated that it utilized the full strength of its fleet, including the newly converted cutting-edge cable laying ship Ariadne and the support vessels for trenching Athena and Argo, both equipped with the latest version of the AssoTrencher IV burial tools.

Offshore Wind Farm Challenges

Asso.subsea emphasized that the preparation and protection of the seabed were crucial for the success of the offshore wind farm project. The loading, transport, and backfilling requirements were successfully met, overcoming unexpected obstacles and challenges.

Offshore Wind Farm Development

The Offshore Wind Projects Director highlighted the importance of using different vessels and specialized subsea tools to ensure compliance with the construction requirements of the offshore wind farm. The optimization of the backfilling process by reusing the previously excavated material was a significant milestone in the project’s development.

Offshore Wind Farm Operations

The newly converted cable laying ship played a crucial role in the success of the backfilling operations of the offshore wind farm. Additionally, the support vessels for trenching were essential to ensure efficiency and safety during the construction phase of the offshore wind farm.

Offshore Wind Farm Challenges

The use of advanced technologies and innovative approaches was crucial to address the difficulties encountered in the construction process of the offshore wind farm. The combination of state-of-the-art techniques and expertise was fundamental in overcoming the challenges presented by very hard soils and backfilling requirements.

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