JK850 Geothermal Drilling Rig Geothermal boreholes put two demands on a rig: depth and torque. The JK850 covers both. It is rated to 850 meters, which is deep enough for closed-loop heat exchange fields and for many production-scale geothermal projects. And with 34KN.m of rotary table torque, it keeps turning in the hard, abrasive formations that geothermal work usually hits. Most of our geothermal customers run the electric motor version because drilling sites near buildings
