Hejian Yinhai Drill Bits Manufacture Co.,Ltd is a Roller cone bits and PDC bits enterprise, our bits basing on high-tech skills and designs are used in the exploitation of natural gas, crude oil, waterwell, geological exploration and so on.. The company is located in Hebei province Hejian city, Junziguan industrial district where there is the main source of drill bits manufacturing and distribution of China. Our company was set up in 1980, the various drill bits we produce have a good fame all over the world. And now has become a uprising oil and gas drill bits manufacturer in China. There are quite a number experienced technical engineers in our company. market oriented, advanced technology, cone bits and PDC bits production lines are equipped with more than 100 sets of advanced machineries with 3 complete heat-treatment automatic production line. Tricone bits from 6 to 17 1/2 inch, both steel milled tooth and Tungsten Carbide Insert Bit with metal seal??e also have many advanced inspection facilities such as image processor plasma spectrometer, drilling simulator and so on. Good quality is the main aim we abide by all the time. We adhere to the principle of ??win the customers by attractive quality and price?? and we will provide excellent products and satisfactory services for customers.