Method and device for the drilling of holes in ground or rocky material

A device for drilling holes in soil or rock material, wherein a borehole is formed by a percussive and/or rotational movement, the device comprising

• a drill bit mounted on a drill rod assembly,
• an envelope tube and a jacket tube capable of being introduced into the borehole,
• the drill bit being capable of being acted upon by the drill rod assembly in its central region,
• the drill rod assembly acting on an impact shoe cooperating with the envelope and jacket tubes,
• the drill rod assembly being coupled via an interposed impact ring with the impact shoe for transmission of impact energy onto the envelope and jacket tubes, and
• the drill bit and the impact ring being coupled to the drill rod assembly via plug-in connections,
• the drill bit, on its working surface, includes at least one passage opening for introduction of material into an annular space defined between an outer periphery of the drill rod assembly and inner peripheries of the envelope tube and the adjoining jacket tube.

A device for drilling holes in soil or rock material, wherein a borehole is formed by a percussive and/or rotational movement, the device comprising

• a drill bit mounted on a drill rod assembly,
• an envelope tube and/or a jacket tube capable of being introduced into the borehole,
• the drill bit being capable of being acted upon by the drill rod assembly in its central region,
• the drill rod assembly acting on an impact shoe cooperating with the envelope and/or jacket tube,
• the drill rod assembly being coupled via an interposed impact ring with the impact shoe for transmission of impact energy onto the envelope end/or jacket tube, and
• the drill bit and the impact ring being coupled to the drill rod assembly via plug-in connections,
• a guide tube overlapping the impact shoe arranged to follow the drill bit on an end facing away from a working surface, the guide tube, together with the drill bit, being capable of being rotated relative to the impact shoe as well as the envelope and/or jacket tube connected therewith.

A device for drilling holes in soil or rock material, wherein a borehole is formed by a percussive and/or rotational movement, the device comprising

• a drill bit mounted on a drill rod assembly,
• an envelope tube and/or a jacket tube capable of being introduced into the borehole,
• the drill bit being capable of being acted upon by the drill rod assembly in its central region,
• the drill rod assembly acting on an impact shoe cooperating with the envelope and/or jacket tube,
• the drill rod assembly being coupled via an interposed impact ring with the impact shoe for the transmission of impact energy onto the envelope end/or jacket tube, and
• the drill bit and the impact ring being coupled to the drill rod assembly via plug-in connections,
• the impact shoe being welded with the envelope tube and/or the jacket tube.

A device for drilling holes in soil or rock material, wherein a borehole is formed by a percussive and/or rotational movement, the device comprising

• a drill bit mounted on a drill rod assembly,
• an envelope tube and/or a jacket tube capable of being introduced into the borehole,
• the drill bit being capable of being acted upon by the drill rod assembly in its central region,
• the drill rod assembly acting on an impact shoe cooperating with the envelope and/or jacket tube,
• the drill rod assembly being coupled via an interposed impact ring with the impact shoe for transmission of impact energy onto the envelope and/or jacket tube, and
• the drill bit and the impact ring being coupled to the drill rod assembly via plug-in connections,
• the impact shoe and the impact ring as well as the drill rod assembly and the drill bit comprise stop surfaces each enclosing an acute angle with a longitudinal axis of the drill rod assembly or having a spherical calotte shape and provided for transmission of impact energy from the drill rod assembly onto the drill bit and the impact shoe and impact ring, respectively.