Specification and performance of oil casing

Oil casing according to the provisions of SY/T6194-96, the length of the casing is not fixed, the range of 8-13m. But not less than 6m of the casing can be provided, the number shall not exceed 20%. Collar outer surface may be folded, crack, delamination, crack, rolling reduction, surface defects. Oil casing and coupling thread surface should be smooth, burr, tear and impact strength enough to interrupt threads and other defects close connection not allowed.

Oil casing inside and outside surface without folding, crack, delamination, crack, rolling reduction and scarring. These defects should be completely removed, the depth shall not exceed 12.5% of the nominal wall thickness. Oil casing in accordance with the provisions of SY/T6194-96. The casing and the connecting hoop adopt the same steel grade. The sulfur content of < 0.045%, P < 0.045%. According to the provisions of the GB222-84 to take chemical analysis sample. Chemical analysis according to the provisions of the relevant part of GB223. Provisions of the first edition of the American Petroleum Institute ARISPEC5CT1988. Chemical analysis according to the latest version of ASTME59, according to the latest version of ASTME350 for chemical analysis.

The main import countries are: Germany, Japan, Romania, Czech, Italy, the United Kingdom, Austria, Switzerland, the United States, Argentina, Singapore also has imports. Import standards refer to the American Petroleum Institute standard 5AX, API5A, 5AC. Steel grade is H-40, J-55, N-80, P-110, C-75, C-95, etc.. Specifications are mainly 139.77.72R-2177.89.19R-2244.58.94R-2244.510.03R-2244.511.05R-2, etc..