| 摘要 |
The invention relates to a drilling tool for percussive drilling. The drilling tool comprises a drill string assembly (1) comprising at least one drill rod, a drill bit assembly (2), a central flushing channel. The central flushing channel havs a first central flushing channel section (3) in the drill bit assembly (2) and a second central flushing channel section in the drill string assembly (1), and a borehole survey tool (4) in the central flushing channel. The borehole survey tool (4) is arranged in the first central flushing channel section (3) of the drill bit assembly (2), The drill bit assembly (2) may be provided as a drill bit part and an adapter part, or alternatively, in a one-piece form as a drill bit part. |
