Dongying Sanhe Petroleum Equipment Co., Ltd is a professional manufacturer of petroleum equipment and is rich-experienced and fully-equipped in designing and manufacturing all kinds of rods for oilfield production and special tubing as well as most of the tools for well work-over, completion and drilling. Sanhe passed the test of API SPEC 11B, API SPEC 5CT, API SPEC 8C in 2014. The production ,inspection and service of our company passed the certification of ISO 9001、ISO14001 and OHSAS 18001 in 2003. Sanhe has been focusing on technology and cultivation of intellectual resources and set up the professional R & D and testing center, which was rated “Enterprise Technology Center of Dongying City” in 2014. With the development of nearly 30 years, Sanhe products have covered all over the globe and earned good reputations.