Jining City Jintai Petroleum MachineryEstablished in 2013 (originally known as Yuxin Machinery of Shouguang City), we are a specialized company focusing on the manufacturing of oilfield machinery. Our main products include T-grade oil pump rod couplings, SM-grade oil pump rod couplings, and reducing couplings. Our products comply with API Spec 11B and SY/T5029 standards and can be customized to produce couplings of different grades as per customer requirements.The company currently owns over ...