Which Drill Bit for which formation?

An episode from the series "Fun with Drilling Engineering" with Prof. Dr. Matthias Reich.
Camera and experimental setup: Dr. Silke Roentzsch and Dulamjav Unursaikhan.
Made at the Institute of Drilling Engineering and Fluid Mining of the Technical University Bergakademie Freiberg, Germany. The education of Petroleum Engineers belongs to the Geotechnics and Mining program. Please feel free to visit our homepage on tu-freiberg.de... or send us feedback, enquiries or suggestions to [e-mail]. Voiceover Artist: Mark Jacob.