Cangzhou Great Drill Bits Co. Ltd., founded in 2010, speciallized in processing research of steel and diamond materials, is involved in the R&D, design, production and sales of petroleum equipment, up to now we have being the top material supplier of CNPC, SINOPEC, CNOOC.We have a 40,000 m2 of production based in Hebei Hejian provincial development zone, and several international advanced production lines featured in turning-milling compound, five-axis linkage, special for high-performance diamond processing, with the annual production capacity of more than 10,000 pcs.; We provide the drill bits from 3?to 26?of different series: such as Matrix body series, Steel body series, Coring series, Bi-center series, Reaming tools, etc.Which include PDC Bits,Tricone Rock Bits,HDD Hole Openers,Reamers,Roller Cone Cutters,Pilot Bits,Coring Bits,Bi-center Bits and so on.