OCTG: It is the abbreviation of English Oil Country Tubular Goods, and its Chinese meaning is special oil pipes, including refined oil casings, drill pipes, drill collars, couplings, short joints, etc.
Oil pipe: Pipe used in oil wells for oil production, gas production, water injection, and acid fracturing.
Casing: A pipe lowered from the ground surface into a drilled wellbore as a lining to prevent the wellbore wall from collapsing.
Drill pipe: A tube used to drill a wellbore.
Line pipe: Pipe used to transport oil and gas.
Coupling: A cylindrical body with internal threads used to connect two threaded pipes.
Coupling stock: Tube used to make couplings.
