KDM Marine International proposed a specialist piece of equipment thatwas based in the USA. The DP600 hydraulic dredge tool mechanically cutshard soils and removes the excavated spoil out of the area through a 10" discharge hose. The spoil can be either lifted up into the water column and transported away in the prevailing current or disposed in a dedicated area.

Outcome

This was an extremely challenging project which two previous methods employed by the client to clear the areas had failed.

The DP600, which was flown to the UK from Louisiana, USA, was chosen by the main client to be the primary excavation tool with final 'profiling' of the holes undertaken by a more conventional venturi-driven suction tool.

The three areas, each 25m diameter x 3m depth, were excavated in approximately 120 operational hours.

Jerome Lucas, Wells Operations Manager at TOTAL E&P UK, said:

"Following the various issues experienced earlier this year to dredge the location in the vicinity of a producing platform, the Tusk DP600 tool was seen as a clear step change in the dredging method, combining both mechanical cutting and pumping capability at the same time. The tool clearly met the promises made by KDM in term of efficiency and reliability. This tool is now considered field proven for harsh environments and at this water depth. I would personally recommend it for such dredging operations. I also greatly appreciated the professionalism and commitment of KDM in making this first trial in the North Sea a success with operations performed safely and efficiently."