As part of its sustainability work, a residential company in Gothenburg, Sweden (Stena Real Estate) were to install rock heat in a residential area in the neighborhood 'Pennygången'. This was to be a complement to the district heating they already had.
LKAB Wassara drilled a total of 28 boreholes with a depth of 135 meters each.
To handle the upcoming drilling water they just let it flow into a pit next to the rig. From there the water was pumped to a rough sedimentation tank and then on to Wassara's lamella sedimentation tank. One had to help the flow from the sedimentation tank to the well with a submersible pump.
Water being pumped from the pit next to the rig.
Water being transported to the sedimentation tanks.