300 m is the length of the most difficult drilling with a parabolic trajectory, which was made as part of the construction of the power grid & #8211; WN-110 kV cable line and technologically related fiber network, GPZ Gdańsk Śródmieście & #8211 connection; GPZ Gdańsk Young City. The drilling depth reached 17 m.
Works related to this drilling, to which the Ditch Witch JT3020 drilling rig was mobilized (189 l / min of mud pump capacity, 13 tons of pulling power), took five days. They started on February 27 and ended on the night of March 3-4. This is a great success for a machine with these parameters. The bentonite Hydraul Ez supplied by Dakor, a representative of the Cetco company, was used to prepare the scrubber.
Drilling works were carried out at a distance of 200 m from the Dead Vistula in the shipyard areas, which hide many un-inventoried constructions and utilities affecting disturbances in the operation of location systems. DigiTrak Falcon F2 navigation system was used for drilling.
In total, drillings over a total length of 1743 m are to be performed throughout the entire construction route. Drilled holes in HDD technology will be used to install four pipelines (three DN160 and one DN110). The total number of cables installed underground as part of the drilling works will be about 7000m.
See the route of the completed 300-meter drilling & #8211; click