The apparatus and measures on hole a hole in the ground or bedrock

摘要

Drilled hole (9) in the rock or the ground, rotating percussion drilling or percussion drilling in particular, relates to a method and apparatus, borehole (9), the present invention, a drill bit that is mounted drill pipe (3) (1 It is formed by rotational motion shots and / or by). The drill bit is provided in (1), the drill point of the several that can be driven independently of each other and can be coupled to (3) the drill pipe (2). In accordance with the present invention the drill point (2), to be separated from strong bonding drill pipe thereof and (3) at the completion of the excavation process, it can be moved toward the center of bore holes (9) Furthermore, the borehole (9) can be removed easily and reliably, a drill bit and a (3) and (1) the entire drill point and the drill pipe (2) upon completion of.