EXECUTED WITH AN INCREASED VISCOSITY BORING CROWN OF THE TOOL FOR DRILLING BREEDS AND METHOD OF INCREASING THE VISCOSITY OF SUCH BORING CORES

摘要

1. The drill bit (10) of the tool (12) for drilling rock, having a drilling surface (10b), intended for contact with the rock during drilling, characterized in that the longitudinal section (10t) of the drill bit (10) through the drilling surface (10b) characterized by the following ratios Lsum (depth) / Lsum (5.0) and H (depth) / H (5.0) at given depths, where H (depth) / H (5.0) is measured in accordance with the Vickers test, and Lsum (depth) / Lsum (5.0) is measured in accordance with the Palmquist method, essentially along the longitudinal axial center line (C) of the drilling core Onki:! Depth [mm below the drilling surface (10b)] Lsum (depth) / Lsum (5.0) × 100 H (depth) / H (5.0) × 100 0.3 maximum 40, preferably maximum 20 maximum 104 0.5 a maximum of 52, preferably a maximum of 32 a maximum of 104 1.0 a maximum of 75, preferably a maximum of 56 a maximum of 104 2.0 a maximum of 94, preferably a maximum of 80 a maximum of 104 5.0 100 100! if the drill bit (10) has a length (L) of 10 mm or more, and the longitudinal section (10t) of the drill bit (10) through the drilling surface (10b) is characterized by the following ratios Lsum (depth) / Lsum (3,5) and H (depth) / H (3,5), where H (depth) / H (3,5) is measured in accordance with the Vickers test, and Lsum (depth) / Lsum (3,5) is measured in accordance with the Palmquist method described herein essentially along the longitudinal axial center line (C) of the drill bit:! Depth [mm below the drilling surface (10b)] Lsum (depth) / Lsum (3.5) × 100 H (depth) / H (3.5) × 100 0.3 maximum 40, preferably maximum 20 maximum 104 0.5 maximum 52, preferably maximum 32 maximum 104 1,0 maximum 75, preferably maximum 56 maximum 104 2,0 maximum 94, preferably maximum 80 maximum 104 3,5 100 100