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drill pipes tool joint/ drilling joints/oil drill pipe joint
---high quality low carbon alloy steel as raw material
---By high pressure molding, the true air-conditioning and tempering treatment, the mechanical properties
Specification:
1.Grade:J55, K55, N80-1, N80-Q, L80, C90, P110
2.We also supply permium thread products by customer's request
3.Size: tubing coupling from 1.9" to 4-1/2",Casing coupling fro4-1/2"to 13-3/8"
4.Type: NU, EU(tubing coupling),LC,BTC(casing coupling).
5.Surface treatment: Whole phosphating, or inside phosphating and outside coating
oil drill pipe joints
