| Usage: used for hydropower, transportation and other drilling in mines. Cutter selection of high quality diamond composite sheet (PDC), a drill body with high wear resistance, high toughness, high quality special metal material, with abrasion resistance and impact resistance, strong toughness, not shrinking diameter, high efficiency drilling, greatly improving the drilling efficiency, drilling rate is high, which can improve the construction efficiency, reduces the labor intensity of construction, and has wide adaptability, and can be used in the formation of F ≤ 12. |
