Gradually carried out a study PDC bit drilling hard rock, and with the bottom driver made ​​a good effect

Oil and gas drilling industry, rock into soft, medium, hard three categories, a total of 10 indicators can be drilled, drilling in hard-over (5 or more) rock oil and gas drilling has been restricted to the deep development of the technical difficulties . As China's industrialization process accelerated, sustained and mineral resources, security of supply has become a people rich, the country strong and critical national security constraints. For drilling hard rock formations, geological  cutting tools  uses diamond bit drilling and oil and gas drilling industry addition to the traditional method using cone drill bits and diamond drilling, but also gradually got into the hard rock PDC bit carried out research and with bottom drive  abrasive wheels effect. Here will be described separately cone drill bits, diamond drill bits and PDC bits in hard rock drilling Application of the status quo. Two main rock bit tricone rock bit system, shown in Figure 1. Pressure and the rotational force of the drill under the action of gear teeth both  Diamond blade , resulting in a rolling, sliding and shock and vibration effects composite crushed rock, an impact on the rock, crushing and cutting shear, can significantly improve the mechanical drill speed.