... Casing Sizes: OD 4-1/2"~20" 2.Casing Grade: H40, J55, K55, N80, M65, L80, C90 3.Casing Length: R1,R2, ... Sizes: OD 4-1/2"~20" 2.Casing Grade: H40, J55, K55, N80, M65, L80, C90 3.Casing Length: R1,R2 ... to API SPEC 5CT Casing . Casing Steel grade: J55, K55, L80, N80, C95, P110 O. D. Range Tubing: From 2-3/8"to ... 4-1/2"(EUE/NU) Casing: From 4-1/2" to 20", Casing Threads: BTC, ...