API-5CT N80 Casing Pipe

Posted:2018-07-19 16:43:47

API-5CT N80 oilfield casing pipe contains N80-1 and N80-Q types. Those two materials are absolutely consistent regarding the chemical composition and mechanical attributes, they are just various in the heat treatment.

During heat treatment, N80-1 steel is treated by normalizing and tempering, while N80Q steel is treated by quenching and tempering. Therefore, the collapsing strength and internal pressure strength of N80Q are higher than that of N80-1. N80-1 or N80Q should be clearly shown by the designer when N80 casing is selected.

Due to the high capability of N80 material, those API-5CT casing pipes are broadly applied in natural gas as well as coal bed methane extraction, and geothermal wells.
API 5CT N80 casing pipe Chemical Composition:

Grade	C≤	Si≤	Mn≤	P≤	S≤	Cr≤	Ni≤	Cu≤	Mo≤	V≤	Als≤
API 5CT N80	0.34-0.38	0.20-0.35	1.45-1.70	0.02	0.015	0.15	/	/	/	0.11-0.16	0.02

API 5CT N80 casing pipe Mechanical Property:

Steel Grade	Yield Strength (Mpa)	Tensile Strength (Mpa)
API 5CT N80	552-758	≥689

API 5CT N80 casing pipe is important equipment for oil drilling . API 5CT N80 casing pipe main application is to support the sidewall of the oil well during drilling. API 5CT N80 oil casing pipe plays an important role to guarantee the normal operation of the whole well drilling work.

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