The characteristics of the IADC 547 tricone drill bit size:8 1/2 IADC:547 WOB:0.35-1.05 RPM:110-40 Bearing:rubber sealed bearing Applicable formations:medium soft with low compressive strength and harder abrasive stringers,such as hard shale,hard gypsolyte,soft limestone,sandstone and dolomite with stringers,etc Hebei Crossing Drill Bit Manufacture Co.,Ltd is a professional supplier of drilling tools.With years of study and refining of the introduced technology,we have succeeded in the field of products research with proprietary intellectual property rights.Also, we have made major breakthrough in the lines of analogue simulation in bottom-hole fiow field,profile optimization,design of inserts arrangement and low torque,material and manufacturing t echniques etc.As a result,our products own better characters of service and ranges of application.Mainly used for oil and gas,mining,geothermal,construction and so on. The products of our company have achieved industrialization and serialzation.Besides our company has always laying importance on the technical exchanges and cooperation with the counterparts both at home and abroad.Our products have been sole all over the world,including the United States,England,Canada,Brazil,Russia,Italy,Iran,Saudi,Arabia,Korea,India,and Poland and so on. The main products Tricone bit(TCI and MT bit) PDC bit(steel body and matrix body) Reamer bit(HDD rock reamer bit,barrel reamer and fly cutter,replaceable cutter rock reamer) Drag bit,Core bit,Three and four wings PDC bit Accessories(Nozzles,bit breaker,swivel,chain wrench etc.)