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low price api 5ct l80 s135 oil well drill steel pipe

Hebei Chengyuan Pipe Industry Group Co., Ltd

Petroleum casing is an important equipment for oil drilling. Its main equipment includes drill pipe, core pipe and casing, drill collar and small diameter drilling pipe. Domestic casing is made of hot-rolled or cold-drawn steel for geological drilling. Steel grade is expressed as "geology" (DZ). There are DZ40, DZ55 and DZ753 commonly used casing grades.