Vorrichtung für eine Rohrtour eines geologischen Bohrlochs, Rohrtour, Verfahren zum Betreiben einer geologischen Bohranlage sowie Verfahren zum Herstellen einer Rohrtour für ein geologisches Bohrloch

The invention relates to an apparatus for a pipe string of a geological drill hole, with a pipe string element and a fluid supply line which is arranged outside the pipe string element, extends along the pipe string element and is connected to a fluid injection device on the pipe string element, by means of which a fluid supplied through the fluid supply line can be introduced into an inner space of the pipe string element. The invention furthermore relates to a pipe string of a geological drill hole, in particular of a geothermal drill hole, a method for operating a geological drilling machine and a method for producing a pipe string for a geological drill hole.