Tricone Bit, Drill Bit, PDC Bit manufacturer / supplier in China, offering Ruishi Bits 22in (558.5mm) IADC Code 115 Tricone Bit API Factory, Oilfield Well Tungsten Carbide Steel Body PDC Bit 9 Inch Mining Well Drilling Diamond Bit Matrix Body Well Drilling Bit, Factory Price API 8 1/2", 9 1/2", 12 1/4"Tricone Bit, Roller Cone Bit, Rock Drill Bit for Oil Water or Gas Well Drilling and so on.