The petroleum casing is mainly used for supporting the well wall during and after the well completion to ensure the normal operation of the whole well. The commonly used standard is API SPEC 5CT, the commonly used steel grades are J55, K55, N80, N80Q, L80 series, C90, R95, P110, Q125, and the specifications of the casings we provide are from 4 1 / 2 “(114.3mm) to 16” (406.4mm), and the thread types are STC, LTC, BTC, etc. To learn about our products, please contact [email protected], 5 production lines will ensure sufficient supply capacity.