Mudanjiang Dongxu Machinery Co.,Ltd is a private factory collecting with research, production, sales, service.our factory has been in business for over 7 years. I'm working in this line for 5 years. It is a high and new tech enterprise specially appointed supplier to China National Petroleum Corporation and Chemical Corporation in the drilling tools. Our factory has passed ISO9001;2000 Standard quality system authentication, and been honored with API spec-7-1 certificate by America Petroleum Institute. Our factory covers an area of 20000square meters with a very strong team of technicians and researchers, possesses reliable production lines and advanced technology. Our team will manufacture from existing designs or collaborate with the customer to design and manufacture to their specifications. Our products: drilling tools(stabilizers, kelly cock valves, subs),fishing tools( spears,overshot),milling tools, and oilfield equipments(Hydraulic bucking unit, hydraulic Jar tester)