Diamond composite sheet(PDC)is under the condition of high temperature, the artificial diamond and hard alloy prepared special superhard material, it not only has the advantages of high hardness wear resistance of diamond hard alloy, but also have a strong impact resistance, a large blade, it can greatly improve the blade bit the bit working efficiency, is ideal for drilling in hard rock and hard rock; the main categories of diamond composite piece drill bit manufactured by our company are: diamond diamond drill bit bolt concave(diamond core drill), diamond core drills, diamond blade drill, diamond