Couplings for Oil casing pipe

API SPEC 5CT, ISO11960, API SPEC 5B Tubing is used for extracting petroleum and natural gas from the well. Casing pipe serves as walls of the well.

Size: 41/2" -20" Thread ends STC, LC, and BC.VAM etc.

Steel: J55, K55, N80, L80, C90, T95, P110, Q125, V150

Length: R1 4.88-7.62Meter, R2 7.62-10.6Meter, R3 above 10.36.
Ausin pipeline material&equipment co.,ltd.