Rotech Subsea clears sand waves, debris from Taiwan wind farm
Aug. 17, 2023
Rotech Subsea has completed sand wave clearance and debris removal at an unnamed wind farm offshore Taiwan.
Courtesy Rotech Subsea
Courtesy Rotech Subsea
Offshore staff
ABERDEEN, UK— Rotech Subsea has completed sand wave clearance and debris removal at an unnamed wind farm offshore Taiwan.
The company mobilized its TRS2 controlled flow excavation and RSBG (Boulder Grab) equipment spreads from its base in Aberdeen for the campaign.
The TRS2, operating in water depths of 12m to 40 m, performed sand wave clearance along multiple cable routes at a rate of 2-5 m/min, while the RSBG grab tool removed and relocated debris identified along the route.
Courtesy Rotech Subsea
Initial work, in loose sand conditions, entailed a pre-sweep of the sand waves to the client’s specifications with each trench measuring 12 m to 15 m wide with a maximum gradient of 15 degrees.
Several passes were needed with the TRS2 operated perpendicular to the cable route at varying heights of about 3 m to 6 m from MSBL to achieve a wide spread of flow.
Upon completion of operations, Rotech conducted further cable burial trials at the client’s request using its TRS1 LD jet trencher for a planned future project phase.
