Hejian Yinhai Drill Bits Manufacture Co.,Ltd is a Roller Tricone Bits and PDC Bits enterprise ,our bits basing on high-tech skill and designs are used in the exploitation of natural gas ,crude oil ,water well, geological exploration and so on .The company is located in Junzi guan Industrial district, HeJian city, Hebei Province, where there is main source of drill bits manufacturing and distribution of China. There are quite a number experience technical engineers in our company. Marekt oriented ,advanced technology, conebits 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 Bits with metal seal ,we also have many advanced in spection facilites 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 customer by attractive quality and price? and we will provice excellent product and satisfactory services for customer