Oil casing pipe is used to support the walls of oil and gas wells to ensure the operation of the entire oil well after the drilling process. So what technical specifications does it have?

1. The domestic bushing pipe shall be in accordance with the regulations of SY/T6194-96, and the length of the bushing pipe is not fixed, and its can be 8-13m. And casing pipe that not shorter than 6m can be provided, and its quantity shall not exceed 20%.

2. The inner and outer surfaces of the casing pipe shall be free from folds, hairlines, delaminations, cracks, folds and scabs. These defects shall be completely removed, and the removal depth shall not exceed 12.5% of the nominal wall thickness.

3. The outer surface of the coupling must not have defects such as folds, hairlines, separation layers, cracks, rolling folds, and scarring.

4. The thread of the casing pipe and coupling should be smooth, without burrs, tears and other defects that can interrupt the thread and affect the strength and tight connection.