Abstract: In order to obtain information on the drilling site in the case of deep wells quickly and precisely, a measuring device (6) having an electrically operated measuring unit for measuring relevant data relating to the rock, the drilling mud and/or the raw material to be obtained is proposed, the measuring device (6) being designed for supplying electrical energy via the drill column (3) and for data transfer to the surface likewise via the drill column (3).

Abstract: The invention relates to a drill column (3) for deep wells, having a plurality of drilling pipes (10) having drilling pipe bodies (12) made from an electrically conductive material and a plurality of bushes (11) having bush bodies (27) made from an electrically conductive material. In order to obtain information from the drilling site quickly and precisely, provision is made for one electric pole to be formed by the drill column body comprising the drilling pipe bodies (12) and the bush bodies (27) and for the other electric pole to be formed by at least one conductor (7), which is electrically insulated from the drill column body and is arranged within the drill column body, with the result that transfer of both electrical energy and data is possible.