The N80 oil and gas API casing pipe includes N80-1 and N80-Q types. These 2 products are consistent in the chemical structure and mechanical residential or commercial properties, and are simply different in the heat treatment. This type of item is commonly utilized in the oil drilling process.
As its mechanical homes are greater than J55 and K55 types, it can be used to some a little more complex developments. With much deeper downhole depth than J55 and K55 types, it can be utilized for the exploitation of middle-level oil and gas. Due to the high efficiency of N80 material, this API casing pipe is thoroughly used in gas and coal bed methane extraction, along with geothermal wells.
|Standard codes||Models of steel tubes||Tensite strength（MPa）||Yield strength（MPa）||Elongation（％）||Hardness|
|API SPEC 5CT||J55||≥517||379～552||check the table|
Models of steel tubes
|API SPEC 5CT||J55K55 (37Mn5)||0.34～0.39||0.20～0.35||1.25～1.50||≤0.020||≤0.015||≤0.15||≤0.20||≤0.20||≤0.020|
|N80 (36 Mn2V)||0.34～0.38||0.20～0.35||1.45～1.70||≤0.020||≤0.015||≤0.15||0.11～0.16||≤0.020|
Specifications of API 5CT N80 Oil and Gas Casing Pipe
|Material||N80, steel grade|
|Outer Diameter||4 1/2″-20″, (114.3-508mm)|
|Form of Thread||Buttress thread casing, Long round thread casing, Short round thread casing|
|Function||It can protect the tubing pipe.|