Description: which is a matrix body PDC bit four to eight curved blades using arc-type ang short parabolic shape design, the rational allocation of different functions small size cutters,so that the PDC bit have a strong impact resistant, hyfrualic balance design, with each balde cuttting the amount of displacement is proportational to the volume of cutttings transports to match the PDC bit cutting transports capacity optimization. while using a dynamic flow simulation technlogy to optimize the hydraulic design of the PDC bit, so bottom hole flow field optimization, enhanced PDC bit cleaning, coolling capacity,more optimum bottom hle flow pattern and anti- balling. Medium hard to hard formations with high compressive strength and abrasive, such as shale, limestone, anhydrite, sandstone and so on The main structure features: Tungsten carbide matrix PDC possesses high wear resistance and impact resistance. Parabolic crown profile and maximizes junk slot area can clean bit better, and prolong the bit working life. Applying hydraulics balance design, 5 renewal nozzles and reasonable nozzles locating angle can gain ideal fluid field in well bottom, fully clean and cool cutter, and prolong the cutter working life. Non-symmetry blade arrangement enhances drilling well balance. Optimization for cutter shape, slant angle, cutter numbers prolong the cutter working life in combination with high quality PDC cutter, and improve ROP and drilling efficiency. It can be used on rotary or down hole motor. High HIS is recommended. Product Advantages: 1. PDC cutters for high speed drilling; 2. All cutters are premium grade for extended bit life and durability; 3. Cutter layout is force balanced to drill a precise round hole and reduce bit whirl; 4. Large junk slots and flushing ports; 5. Advanced geometric design for faster penetration; 6. Gauge pads have tungsten carbide inserts for maximum wear resistance;