Bluestream Offshore, a subsidiary of OEG Energy, has been awarded a contract by TenneT to retrofit a corrosion protection system on the SylWin alpha offshore converter station, part of the SylWin1 offshore grid connection in Germany. The contract covers the subsea installation of an Impressed Current Cathodic Protection (ICCP) system, designed to replace the existing faulty system.
The project includes the decommissioning of outdated cables and debris that cause system interference. A pre-survey will be conducted using a remotely operated vehicle (ROV) equipped with multibeam sonar and visual inspection tools to assess the work area and identify any obstructions.
For the installation of the new ICCP system, Bluestream will route and secure subsea cables through the J-tube, install and connect three ICCP buoy-mounted anodes, and ensure the proper positioning of the system around the jacket structure. Concrete mattresses will be placed to protect and stabilize the cables. Once installation is complete, the system will undergo commissioning, functional testing, and an as-left survey to verify operational integrity.
The work will be carried out from a DP-2 Dive Support Vessel (DSV) equipped with a walk-to-work system. The offshore crew, which will work 24/7, will consist of divers, ROV pilots, and supervisors for the subsea installation. The vessel will be mobilized with a full suite of diving equipment, ROVs with imaging sonar, and precision tools.
Rutger Lieverse, commercial manager at Bluestream, commented: “We are extremely proud of TenneT’s continued trust in Bluestream’s capabilities and are honoured to be awarded the ICCP installation works at SylWin alpha. This project marks another milestone in our long-standing collaboration on subsea services, reinforcing our commitment to delivering excellence in offshore solutions.”
