Patent ID: 8579048

Claim:
Drilling device with a drilling apparatus for drilling inside a casing tube, the drilling apparatus having a supporting frame with a fastening means for fixation with respect to the casing tube and a drilling tool, which is driven in a rotating manner via a telescopic rod by means of a drill drive arranged on the supporting frame, wherein at an upper end of the casing tube an adjustable receiving part is arranged, onto which the supporting frame of the drilling apparatus can be fastened, the receiving part is adjustably supported between a drilling position, in which the drilling apparatus is located at the receiving part on the same axis with respect to the casing tube, and an offset position, in which the receiving part is laterally offset with respect to the casing tube; an adjusting means with drive is provided, with which the receiving part can be adjusted between the drilling position and the offset position; wherein at the upper end of the casing tube a platform is provided, on which the receiving part and the adjusting means are arranged.