Mud Pump, Top Drive, Power Tongs manufacturer / supplier in China, offering API Standard 5CT Casing & Oil Casing Tubing Coupling J55/K55/N80/L80/P110/C95/T95/80s for Seamless Steel Well, Drilling Rig Spares API 5CT Standard K55 J55 N80 L80 P110 Coupling Casing Tubing for OCTG, L80/P110 Casing Pipe for Sour Service Corrosion Resistant Material and so on.