Hejian Yinhai Drill Bits Manufacture Co.,Ltd. is a Roller Tricone and PDC enterprise, our bits basing on high-tech skills designs are used in the exploitation of natural gas, crude oil, waterwell, geological exploration so on. The company located Junziguan ...

Hejian  Yinhai  Rock  Bits  manufacture Co., Ltd  is  a rolller  tricone bits and  PDC bits  enterprise ,our  bits basing on high  tech  skills and  design are  used in  the expoitation   of natural   gas , crude oil , ...