Welcome contact us at ***** .We, Tianhe Oil Group Co., Ltd, are one of the largest drilling tools manufacturers in China. Tianhe Oil Group has been in business for over 35 years, and our customers can be found both domestically and internationally. Our experience is your gain. Tianhe Oil Group now has more than 700 employees and get hit annual sales of US$28 million. Tianhe Oil Group manufactures a full range of API drill stem products including Drill Collars, Spiral Drill Collars, Integral Heavy Weight Drill Pipe, and several kinds of drilling tools, work-over tools, cementing tools, coring tools, Stabilizer, fishing tools and fitting, Hydraulic Bucking Unit, Hydraulic Jar Tester, Hydraulic Down hole Motor Tester, BOP automatic cleaning systems and other equipments, which are more than 120 types of products and over 1000 Specifications.