Video: The Geothermal Drilling Process ( BKM Production)
Entrepose Drilling is a French company that specializes in deep onshore drilling (oil & gas, geothermal, water) and geological sampling and coring at great depths. Their head office is located in Maisse near Milly-la-Foret just south of Paris. In recent years they have drilled 12 production and reinjection wells for Aéroports de Paris and the towns of Coulommiers, Lognes, Orly, Paris, Sucy-en-Brie and Champigny-sur-Marne in France.
They have recently posted a good video on the drilling process, in particular in connecting to geothermal resources. The video is a good overview of the technology without being too technical.