Petroleum tubing: tubing used in oil wells for oil recovery, gas recovery, water injection and acid fracturing. The physical meaning of steel grade code is the same as that of casing grade. The larger the number, the higher the strength of the steel grade oil pipeline.
According to the strength of steel itself, casing can be divided into different grades, namely J55, K55, N80, L80, C90, T95, P110, Q125, V150, 13cr, etc.
Implementation standards: API 5CT and 5B standards;
Common models: 1.315 "-4-1/2"
Product Specification: 33.4-114.3
Thread connection: EUE, NUE, special connection