METHOD FOR THE DRILLING, IN PARTICULAR PERCUSSION OR ROTARY PERCUSSION DRILLING, OF HOLES IN SOIL OR ROCK MATERIAL AND DEVICE THEREFOR

摘要

In a method for the drilling, in particular percussion or rotary percussion drilling, of holes in soil or rock material, wherein a borehole is formed by a drill bit (2) mounted on a drill string (4) by means of a percussive and/or rotational movement, a casing (5) adjoining the drill bit (2) is introduced into the borehole by being pulled and/or struck and material that is removed is introduced into the annular space formed between the outer circumference of the drill string (4) and the inner circumference of the casing (5) via at least one through-opening (11), formed between the drill bit (2) and the casing (5), and is discharged from the borehole; the impact energy of the drill string (4) is applied to the drill bit (2) via an adapter (3) interacting with the drill bit (2) and the drill string (4) and the impact energy is applied to the drill bit (2) at least partially via an impact shoulder (13) of the adapter (3) and at least partially via a threaded connection (9) between the adapter (3) and the drill bit (2). A device for carrying out this method is also described.