NMDC, Non-Magnetic Drill Collar, Spiral Drill Collar, Slick Drill Collar

Technical Specifications and Parameters Drill Collar Number O.D. I.D.   Length (mm) DF Bevel Diameter Ref bend Strength Ratio (mm) (in) (mm) (in) NC23-31 79.4 3 1/8 31.8 1 1/2 9150 76.2 2.57:1 NC26-35(2 3/8IF) 88.9 3 1/2 38.1 1 1/2 9150 84.5 2.42:1 NC31-41(2 7-8IF) 104.8 4 1/8 50.8 2 9150 101.6 2.43:1 NC35-47 120.6 4 3/4 50.8 2 9150 114.7 2.58:1 NC38-50(3 1/2IF) 127.0 5 57.2 2 1/4 9150 121.0 2.38:1 NC44-60 152.4 6 57.2 2 1/4 9150&9450 144.5 2.49:1 NC44-60 152.4 6 71.4 2 13/16 9150&9450 144.5 2.84:1 NC44-62 158.8 6 1/4 57.2 2 1/4 9150&9450 149.2 2.91:1 NC46-62(4IF) 158.8 6 1/4 71.4 2 13/16 9150&9450 150.0 2.63:1 NC46-65(4IF) 165.1 6 1/2 57.2 2 1/4 9150&9450 154.8 2.76:1 NC46-65(4IF) 165.1 6 1/2 71.4 2 13/16 9150&9450 154.8 3.05:1 NC-46-47(4IF) 171.4 6 3/4 57.2 2 1/4 9150&9450 159.5 3.18:1 NC50-67(4 1/2IF) 171.4 6 3/4 71.4 2 13/16 9150&9450 159.5 2.37:1 NC50-70(4 1/2IF) 177.8 7 57.2 2 1/4 9150&9450 164.7 2.54:1 NC50-70(4 1/2IF) 177.8 7 71.4 2 13/16 9150&9450 164.7 2.73:1 NC50-72(4 1/2IF) 184.2 7 1/4 71.4 2 13/16 9150&9450 169.5 3.12:1 NC56-77 196.8 7 3/4 71.4 2 13/16 9150&9450 185.3 2.70:1 NC56-80 203.2 8 71.4 2 13/16 9150&9450 190.1 3.02:1 6 5/8 REG 209.6 8 1/4 71.4 2 13/16 9150&9450 195.7 2.93:1 NC61-90 228.6 9 71.4 2 13/16 9150&9450 212.7 3.17:1 7 5/8 REG 241.3 9 1/2 76.2 3 9150&9450 223.8 2.81:1 NC70-97 247.6 9 3/4 76.2 3 9150&9450 232.6 2.57:1 NC70-100 251 10 76.2 3 9150&9450 237.3 2.81:1 8 5/8 REG 279.4 11 76.2 3 9150&9450 266.7 2.84:1