- Petroleum casing is a steel pipe used to support the walls of oil and gas wells to ensure that the drilling process is carried out and that the entire well operates properly after completion. Several layers of casing are used for each well depending on the drilling depth and geology. Cement is used to cement the casing after it is lowered into the well, which, unlike tubing and drill pipe, is not reusable and is a one-time consumable material. Therefore, the consumption of casing accounts for more than 70% of all oil well tubing. The processing forms of tubing ends are: unthickened with threads and couplings, thickened with threads and couplings, flat ends, unthickened with threads and couplings, and thickened with threads and couplings.
- Execution standard: API SPEC 5CT, ISO 11960-2004, GB/T 19830-2011, etc.
- Main production steel pipe grade: J55, K55, N80, L80, P110, etc.
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