Seamless Casing Pipe 1.Grade: J55,K55,N80,L80,P110 2.Thread:BTC, LTC,STC 3.Standard: API 5CT, ISO 4.Place of Origin: China Casing Pipe------------------------------------------------------------------------------------------------------------------------ FeaturesMaterials: H-40,J-55,K-55,N-80,C-75,L-80,C-90,C-95,P-110,Q-125,Type of End-finish: Plain, BTC, LTC,STC Grades: H-40, J-55, K-55, N-80, C ...