Iron Bull’ removes sub-surface objects that could obstruct cable-laying

Iron Bull Technology Enhances Offshore Cable Installation

Iron Bull has introduced a new technology that promises to make offshore cable installations much easier and more affordable. This innovative system helps tackle problems caused by tricky soil conditions and obstacles below the surface. It can save both time and money for companies working on offshore wind projects.

The technology is designed to remove objects buried in the seabed, like large rocks and old cables, that can get in the way during cable laying. It also prepares the soil by using a special drum-cutting method, making it easier to lay and bury cables.

Iron Bull’s system clears a path of 4 meters wide and loosens the soil, making it much easier to bury cables at the right depth. This not only speeds up the process but also reduces costs because there is less need for extra work to protect the cables, such as adding subsea rocks.

The technology helps in two main ways: first, it shortens the time needed to bury the cables, and second, it increases the chance of getting the burial depth right the first time. This means fewer unexpected problems and lower costs.

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Moreover, preparing the seabed in advance and collecting detailed soil data helps keep the construction on schedule. By achieving the right burial depths, the technology also reduces the risk of damaging the cables, which is important because mechanical stress is a major cause of cable failures.

The system includes a 2-MW towed sledge, similar in size to a standard cable plough, and uses strong dredging technology. It has jet-assisted rippers at the front to remove big obstacles like boulders and drum cutters that break down different soil types into loose material. The drum cutters are designed to handle even the stickiest clay and prevent clogs.

This technology was developed with the help of Bruno Tack from Innovate2dredge, who has over 30 years of experience in dredging difficult soils. Seatools, the company behind Iron Bull, is continuing to develop and test the technology with various partners, aiming to bring it to the market by 2027.