Hunan Tianying Drilling Rigs Manufacture Limited Company is the subsidiary firm of Hunan Tianying Technology Group Co Ltd. That formally called Zhu Zhou East Tool Factory, that made the Chinese first tricone bit for ore mining. Our firm is mainly produced ore mining tricone bit , oil tricone bit ,waterwell tricone bit . Group firm covers 120 arcs, the total amount is thirty-one million, the registered capital is eleven million. There are 350 staffs,  There are senior technical talents 49 mans.

         Our firm there are two production line of tricone bit , there are 400 more sets machines of heat treatment, numerical control processing center. We got 89 kinds of size for the 4-5/8〞---13-3/4〞tricone bit , we can open out other type tricone bit with the users. In order to   meeting the drilling demand and improving the perforative efficiency. We constaly innovate on the product structure , refine the production technics. These two years ,we had promoted the sealed ore mining tricone bit , harden surface oil tricone bit , we had established the solid foundation on the basis of the customer profits.

 Group firm had passed the quality system ISO 9000, We are applying the API authentication , We still perfect the quality system , improve the service level, we try our best to meet the customer demand.