Rotech Subsea has competed sand wave clearance for Van Oord at the 370MW Norther offshore wind farm in the Belgian North Sea.
Aberdeen-based Rotech deployed its TRS2 controlled flow excavation tool to carry out the work.
The TRS2 was able to complete to job in a single campaign rather than the two that had been planned, bringing the client’s schedule of works forward.
Rotech’s RSG cable grab tool has now been deployed on a cable recovery scope until February 2020.
Rotech Subsea director Stephen Cochrane said: “The capabilities of the TRS2’s controlled flow technology and its ability to pre-sweep a wide corridor extremely quickly and effectively resulted in increased productivity and a reduction on the project’s total costs.
“Sand waves up to 2.5 metres in height were excavated successfully in water depths of up to 35 metres.
“The project was a huge success, allowing for the Norther IAC to be accessed for burial.
“Soil conditions were described as ‘very dense silty sand to clay’, and the TRS2 achieved an excellent average excavation rate of 3m/min.”