Rotech Subsea completes Belgium cable lowering on back of UK success

12/09/2023
TRS1 LD Taiwan scope

FOLLOWING on from completing the lowering of a UK section of a key UK-Europe fibre optic link, Aberdeen-based subsea excavation and jet trenching leader, Rotech Subsea, has now delivered cable trenching operations on the same cable offshore Belgium. Rotech’s sector leading controlled flow excavation (CFE) shallow water jet trencher – the TRS1 LD – was mobilised to complete the trenching works on the 10km section of cable.

Trenched from the shore – in 1.5m water depth – Rotech’s project team completed the post-lay trenching of the 32mm diameter fibre optic cable to 2.0m Depth of Lowering on schedule in just two passes. The first pass by the TRS1 LD was completed at 3m/min with the second pass by the jet trenching tool progressing at 5m/min. A subsequent survey using a TSS350 mounted to the tool verified that client specification was met or surpassed.

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Speaking about the successful completion of this follow on trenching contract, Rotech Subsea Director of Subsea, Stephen Cochrane, commented:

“This was another extremely successful deployment for our TRS1 LD shallow water CFE jet trencher which further enhances the systems already excellent reputation. Supported by a DP Ultra Shallow Draft Support Vessel – with orientation fixed using two tugger winches – the TRS1 LD was oriented perpendicular to the cable for maximum efficiency. Operating in waters ranging from 1.5m-35m and currents ranging from 1-3knts the trenching scope was executed in just two passes, showcasing the tool’s soil cutting capabilities of 140kPa .

“We are witnessing incredible demand from the market in Europe, Asia and the Americas for our range of patented range of CFE Jetting & Hybrid Jetting tools. Developed and built in-house by our R&D and engineering teams, we believe they are offering our growing list of repeat clients unrivalled capabilities and results.”

With its proprietary range of CFE Jetting & Hybrid Jetting tools, jet trenching and excavation pioneer Rotech Subsea has established itself as the cable trenching and seabed levelling partner of choice in Europe. The company’s research, development and engineering team has created a suite of sector-leading non-contact CFE, Suspended Jet Trenching tools in-house at its Aberdeen HQ. With enhanced capabilities, Rotech Subsea’s CFE & Hybrid Jet Trenching suite of tools is firmly established as the method of choice for offshore wind farm cable trenching and excavation in Europe and beyond.

Rotech Subsea has over 25 tools worldwide now and building more through our engineering division to fulfil 2024 commitments. Rotech is able to offer 14 next-generation spread types, having designed these CFE/jetting/cutting tools to meet market needs since 2015 leading to over 600 projects throughout the 30 years of experience at Rotech.

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