Drilling of a 600 meter deep well for heat exchanger at the resort spa Hof Weissbad in Switzerland, June 1996. The contractor, Foralith AG, was looking for new competitive drilling technology. Previously, they were using roller-cone drilling. Since pneumatic drilling was impossible due to water in the formation, Wassara was the obvious choice.
The well was successfully drilled which proved that the Wassara system is also a superior choice for medium deep wells.
Sandvik, dimensions 159, 165 and 172 mm
Obermann HD 100/2-4-A
Wassara Swivel Stenberg 600