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Drill collars Drill collar thread type OD ID Length (mm) NC23-31 mm in mm in NC26-35 (23/8"IF) 79.4 3 1/8 31.8 1 1/4 9150 NC31- 41(27/8"IF) 88.9 3 1/2 38.1 1 1/2 9150 NC35-47 104.8 4 1/8 50.8 2 9150 NC38-50(31/2"IF) 120.7 4 3/4 50.8 2 9150 NC44-60 127.0 5 57.2 2 1/4 9150 NC44-60 152.4 6 57.2 2 1/4 9150 (or) 9450 ... Keywords: Drill collar Drill pipe Casing and tubing Drill Bit Slick Drill collars Non magnetic
Categories： Minerals, Metals > Pipe & FittingsDongying Eternal Petro- Tech Co.,Ltd. China 
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Drill Collar Product Description » OD ID Length connection style In mm in mm mm 31/8 79.4 11/4 31.8 9150 NC23 31/2 88.9 11/2 38.1 9150 NC26(23/8IF) 41/8 104.8 2 50.8 9150 NC31(27/8IF) 43/4 120.7 2 50.8... Keywords: drilling equipment oilfield products petroleum equipment non magnetic drill collar spiral drill collar
Categories： Minerals, Metals > Pipe & Fittingsdongying goldenman trading co., ltd China
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Non-magnetic drill collar Materials of the Non-magnetic drill collars are from chrome manganese, low carbon obtained by combining a proprietary chemical analysis and a rotary hammer process. The material is resistant to stress corrosion cracking, with high machine ability and no tendency to galling. Keywords: non magnetic drill collar
Categories： Minerals, Metals > Mining MachineryHenan Shenlong Petroleum Drilling Tools Co.,Ltd China
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