1. Six Blades and Capacious Flume Symmetrical parabola crown profile, asymmetrical blades, cutters are distributed as curve and the gauge is designed short spiral. Flow roomage is optimal designed so that mud and rock granule can be clear easily in drilling. 2. High wear resistance cutters. High performance PDC cutters optimal designed highly increase efficiency of drilling. 3. Oppose-circumnutation design. The load on bit is balanced, and journal libration is decreased as well as good performance in directional drilling. 4. This series of bits are suitable for soft to medium-hard formation in directional well drilling.
