Casing Chinese casing size:7389108127146168 etc Oversea casing size:BW NW HW PW ...
Casing shoes Rods and Casing shoes connected with Rods and Casing , size :Q series AQBQNQHQPQChinese standard 607595 ...
Subs Adapter and subs can be produced with all size or customers' requirement....
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