Drill pipes is made from alloy steel accoding to Spec. 5D. All threads are phosphated, copperized or cold worked. All connections are equipped with pressed steel thread protectors. All theads are machined with CNC lathes Double-shoudered and special threads.
Sizes: OD 2 3/8"~6 5/8" Length: 9500mm/12000mm Steel Grade: E75, X95, G105, S135 Upset Style: IU, EU, IEU