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Our company can itself research and develop to produce the deflection-proof and abrasion-proof sucker rod coupling, common coupling, and sub coupling, which are widely used in Shengli, Zhongyuan, Liaohe, Xinjiang , Daqing and other major oil fields in China and exported to India, Russia, Central Asia, Gulf region, Europe and the United States, enjoying high and long-standing reputation home and abroad. Our sucker rod couplings are manufactured from high quality carbon steel AISI 5I40, fully in accordance with API Spec 11B standard, and the size are available in 5/8’’, 3/4’’, 7/8’’, 1’’, and 1 1/8’’.
