N80 petroleum casing and N80 seamless steel pipe are important equipment for oil drilling, whose main equipment also includes drill pipes, core pipes and casing, drill collars and steel pipes for small diameter drilling.
N80 petroleum casing and N80 seamless steel pipe have three kinds of lengths specified in the API standard: namely, R-1 for 4.88 to 7.62m, R-2 for 7.62 to 10.36m, and R-3 for 10.36m to longer.
N80 oil casing and N80 seamless steel pipe are used for oil well drilling mainly for supporting the well wall during the drilling process and after completion to ensure the drilling process and the normal operation of the whole well after completion
N80 petroleum casing and N80 seamless steel pipe types and packaging are divided into two types according to SY/T6194-96 “petroleum casing”: short threaded casing and its coupling and long threaded casing and its coupling. According to SY/T6194-96, domestic casing should be tied with steel wire or steel belt. Each casing and the exposed part of the threads of the coupling should be screwed on the protection ring to protect the threads.
N80 petroleum casing and N80 seamless steel pipe shall be according to SY/T6194-96. The same steel grade shall be used for the casing and its coupling. Sulfur content <0.045% and phosphorus content <0.045%.
N80 oil casing and N80 seamless steel pipe according to the provisions of GB222-84 to take chemical analysis samples. Chemical analysis according to the provisions of the relevant part of GB223.
N80 petroleum casing and N80 seamless steel pipe as specified in American Petroleum Institute ARISPEC5CT1988, 1st edition. Chemical analysis is made according to the latest version of ASTME59, and chemical analysis is performed according to the latest version of ASTME350.