Coupling is a kind of drilling tool in oil field, which is mainly used for tubing connection or casing connection.
7-5/8" N80 SC Casing coupling9-5/8" P110 BC Casing coupling13-3/8" K55 BC Casing coupling20" K55 BC Casing couplingContact:BonneXuEmail:BonneXu@dlpoctg.comSkype:BonnieXu22Linkedin:BonnieXuTel:+86-13602055205WeChat:13602055205 Hot Tags: LC Casing Coupling, China, manufacturers, factory, in stock