Subsea trenching and excavation outfit Rotech Subsea has completed a cable de-burial and post-lay trenching scope at an unnamed offshore wind project in the British North Sea.
Aberdeen-based Rotech Subsea’s RS2 jet trenching tool was deployed to complete the works on multiple sections of the offshore wind farm project.
The unnamed client requested Rotech’s RS2 for the de-burial of cables in one section which were buried 1.5 metres below Mean Sea Bed Level.
The jet trenching tool was also deployed for the burial work of cables in another section of the project which were required to be buried to client specification of 1.5 metres top of cable.
The subsea spread of equipment was mobilised in late 2020 with the controlled flow excavation tool operating in water depths of up to 32 metres LAT.
Soil conditions in the de-burial sector were loose with the presence of clay.
The project was a “great success with the client delighted with the RS2’s technical and performance capabilities which contributed to a saving on total project costs”.