Briefly Understand the N80 Oil Casing
N80 casing pipe is an important equipment for oil drilling. The main equipment includes drill pipe, core tube and casing, drill collar, and small diameter drill pipe. Domestic oil casings are made of hot rolled or cold drawn steel and used for geological drilling. The steel grade is represented by "Geology" (DZ), and there are commonly used casing steel grades such as DZ40, DZ55 and DZ753. 1.N80 petroleum casing application It is mainly used to support the well wall during and after drilling to ensure the normal progress of the drilling process and to ensure the normal operation of the entire oil well after drilling. 2. Specification of N80 petroleum casing SY / T6194-96 stipulates that the length of oil casings made in China is variable, with a range of 8m / 13m, but casings of not less than 6m can be provided, and the number should not exceed 20%. 3. Types of N80 petroleum casing ...