Abstract: The invention relates to a drilling device for establishing a drill hole in the ground, having a main body (11), having a drilling tool which is disposed on one end of the main body (11), having a drive for the drilling tool that is provided on the main body, having a bracing device which is conceived for bracing the drilling device (10) in a cylindrical hollow body (20) and which has at least one bracing plane (31, 32) having at least two bracing elements which by way of a first end are disposed on the main body (11) and which on the second end of said bracing elements have at least one bracing member, wherein the at least one bracing member of the bracing element by means of at least one drive is able to be moved from a first position to a second position. It is provided according to the invention here that the bracing member by way of at least one element on the internal wall of the hollow body provides a form-fitting connection between the main body and the hollow body.

Abstract: A drill pipe for use during the creation of a borehole in a ground along a predetermined drill line, for the near-surface laying of underground cables or electric underground cables in the ground. The borehole is created by means of a drilling device that has a drilling tool for loosening the ground when the drill pipes are advanced, each end of the drill pipe having at least one connection section for detachably connecting it to a further element of a drill string in a tensile resistant manner; the drill pipe has at least one element for producing a tensile-resistant connection to a corresponding element of an advance device for advancing the drill pipe into and/or retracting it from the borehole; and an outer wall of the drill pipe is made in one piece.

Abstract: The invention relates to a drill pipe for use during the creation of a borehole in a ground from a starting point to a target point along a predetermined drill line, in particular for the near-surface laying of underground cables or electric underground cables in the ground. The invention is characterized in that the borehole is gradually created by means of a drilling device that has a drilling tool for loosening the ground when the drill pipes are advanced, each end of the drill pipe having at least one connection section for detachably connecting it to a further element of a drill string in a tensile resistant manner; in that the drill pipe has at least one element for producing a tensile-resistant connection to a corresponding element of an advance device for advancing the drill pipe into and/or retracting it from the borehole; and in that an outer wall of the drill pipe is made in one piece.