Geothermal drilling

drilling rig

Drilling is used for geothermal exploration, and for generating electricity and direct heat use applications.


A bore hole is created by rotating a drill bit on a hollow drill string. As the drill penetrates the ground, steel pipe casing is added to keep the hole open until the required depth is reached. Drilling fluid is circulated to clean cuttings from beneath the bit and carry them back to the surface.


The well is extracting geothermal heat. The pressure of the system must be monitored as temperatures can be over 100°C.