Geothermal work is slower and cleaner than water well drilling, and the hole has to stay straight because the grouting and the loop go in afterwards. This is the JK1300 configuration most of our ground source heat pump customers order. How it is set up for boreholes BW850 mud pump, matched to 105-180mm boreholes with a steady mud programme 12KN.m rotary table, enough torque for 300m of 89mm pipe without stalling in clay 11m mast, so a 6m rod plus the swivel comes out in one
