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