... convenient transportation.Huanyu specializes in water well drill bits,oil well drilling bits ,like: Tricone Bits (Steel tooth & TCI bit),Tri-cone Bit, ... bit,Milled tooth bit,Roller Cone Bits ,matrix body PDC bits,steel body ...3.API Tricone Rotary Bits1,Types: steel tooth tricone ... bearing is ball which can be applied to high rotary speed drilling.4.All rubber compensator is used which can provides ...