Technical Parameter
According to the strength of the steel , the casing pipe can be divided into different steelgrades, namely J55/K55/N80/L80/C90/T95/P110/Q125/V150. The well conditions and well depth are different, and the steel grades used are also different. The casing pipe is also required to have corrosion resistance in a corrosive environment. It is also required that the casing pipe has anti-crushing properties in places with complicated geological conditions.
Mechanical Property of different material:
| Standard |
Grade |
Tensile Strength |
Yield Strength |
Elongation |
Hardness |
| (Mpa) |
(Mpa) |
(%) |
| API SPEC 5CT |
J55 |
≥517 |
379~552 |
0.5 |
|
| K55 |
≥655 |
379~552 |
0.5 |
|
| N80 |
≥689 |
552~758 |
0.5 |
|
| L80 |
≥655 |
552~655 |
0.5 |
≤241HB |
| P110 |
≥862 |
758~965 |
0.5 |
|
Application of oil casing pipe:
The oil casing pipe is mainly used for supporting the wall of the well during and after the drilling to ensure the drilling process and the normal operation of the entire well after completion. The oil casing pipe is the lifeline for maintaining the operation of the oil well.
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