Common tubing buckle types Common tubing buckle types are pided into three types: EU, NU and NewVam. These three types of buttons can be found in the tool workshop. Among them, EU and NU are difficult to distinguish from the appearance of the buttons. Both are button types, but they can be easily distinguished from the entire pipe string. That is, EU means outer NU Indicates no external thickening. New Vam is actually a trapezoidal buckle (the cross section of the buckle is rectangular), and it is not thickened with outside, so it is easy to distinguish.N80 petroleum casing is an important equipment for petroleum drilling. The main equipment includes drill pipe, core pipe and casing, drill collar and steel pipe for small diameter drilling. In order to meet the needs of different environments and different enterprises, there are multiple types of
N80 oil casing. Including straight-connected buckle petroleum casing, small-caliber thin-walled petroleum casing, outer thickened petroleum casing, large-caliber petroleum casing, partial trapezoidal spiral casing, short round-shaped oil casing, and long-shaped oil casing. Among them, the performance parameters of N80 petroleum casing: elongation 0.5%; yield strength 552-758MPa; tensile strength 689MPa.
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