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Non-magnetic Drill Collar: Detailed Product Description drill collar 1)O.D: 2-3/8"-20" 2.Grade:J55 K55 N80 P110 ect 3.Thread :NU EU STC LTC BTC 4.Standard: API 5CT... drill collar Materials of the Non-magnetic drill collars ...

Six-party Drill Pipe: The six-party drill pipe is made from AISI4145H alloy steel. According to API Spec.7 and SY/T6509. IT is formed by hot forged and fully heat-treated by intermediate frequency induction heat treatment ...

Integral Heavy Weight Dill Pipe: thread Upset mm in Mmd center area Mm End area Type I (Length is 9300mm for one piece) 6 5/8FH-I 168.3 6 5/8 114.3 4 1/2 6 5/8FH 209.6 8 1/4 195.70 184.2 176.21 965KG 5 1/2FH-I 139.7 5 1/2 92.1 3 ...

Spiral Drill Collars: The spiral drill collars are made of 4145H modified chromium-molybdenum alloy steel according to API Spec 7 and aSY/T 5144 . All threads can be phosphated,copperised or cold worked. All threads are ...

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Non-magnetic Drill Collar