Abstract: In order to reduce the risk of accidents in mechanically drilling through a stratum and to expand the range of applications of the device for drilling through a stratum, the invention provides that the control elements—which ensure the in-feeding of the cutting rod and the return of the device to the position for being transported by means of interacting the ball-and-socket joint with the control bushing and the body—are embodied as two-stage figure projections on the lateral truncations of the ball-and-socket joint, which cooperate with cutouts in the control bushing and the body; and the line of pipes and the hydraulic motor of the suspension and of the pivot point are optionally replaced by a cable and by an electric motor combined with a hydraulic pump.

Abstract: In order to reduce the risk of accidents in mechanically drilling through a stratum and to expand the range of applications of the device for drilling through a stratum, the invention provides that the control elements which ensure the in-feeding of the cutting rod and the return of the device to the position for being transported by means of interacting the ball-and-socket joint with the control bushing and the body—are embodied as two-stage figure projections on the lateral truncations of the ball-and-socket joint, which cooperate with cutouts in the control bushing and the body; and the line of pipes and the hydraulic motor of the suspension and of the pivot point are optionally replaced by a cable and by an electric motor combined with a hydraulic pump.