Non magnetic drill collar
Made of AISI4145H alloy steel, drill collar mainly used between the dill pipe and drill head and connected by conversion connector so that they can provide the pressure and weighting to dill head ,in order to make the dill head to keep right trace .If order of inquiry please offer: Non magnetic drill collar ·outer diameter of dill collar·handling features·length of drill collar·stress relief features·drill collar bore ·connection type
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Standard size, inner diameter and thread for drill collar
No. | Outer diameter | Inner diameter | Length mm | Should chamfering diameter | Bending strength | ||
mm | in | mm | in | ||||
NC23-31 | 79.4 | 3 1/8 | 31.8 | 1 1/4 | 9150 | 76.2 | 2.57:1 |
NC26-35 | 88.9 | 3 1/2 | 38.1 | 1 1/2 | 9150 | 82.9 | 2.421 |
NC31-41 | 104.8 | 4 1/8 | 50.8 | 2 | 91509450 | 100.4 | 2.43:1 |
NC35-47 | 120.7 | 4 3/4 | 50.8 | 2 | 91509450 | 114.7 | 2.58:1 |
NC38-50 | 127.0 | 5 | 57.2 | 2 1/4 | 91509450 | 121.0 | 2.38:1 |
NC44-60 | 152.4 | 6 | 57.2 | 2 1/4 | 91509450 | 144.5 | 2.491 |
NC44-60 | 152.4 | 6 | 71.4 | 2 13/16 | 91509450 | 144.5 | 2.84:1 |
NC44-62 | 158.8 | 6 1/4 | 57.2 | 2 1/4 | 91509450 | 149.2 | 2.91:1 |
NC46-62 | 158.8 | 6 1/4 | 71.4 | 2 13/16 | 91509450 | 150.0 | 2.63:1 |
NC46-65 | 165.1 | 6 1/2 | 57.2 | 2 1/4 | 91509450 | 154.8 | 2.76:1 |
NC46-65 | 165.1 | 6 1/2 | 71.4 | 2 13/16 | 91509450 | 154.8 | 3.05:1 |
NC46-67 | 171.4 | 6 3/4 | 57.2 | 2 1/4 | 91509450 | 159.5 | 3.18:1 |
NC50-67 | 171.4 | 6 3/4 | 71.4 | 2 13/16 | 91509450 | 159.5 | 2.37:1 |
NC50-70 | 177.8 | 7 | 57.2 | 2 1/4 | 91509450 | 164.7 | 2.54:1 |
NC50-70 | 177.8 | 7 | 71.4 | 2 13/16 | 91509450 | 164.7 | 2.73:1 |
NC50-72 | 184.2 | 7 1/4 | 71.4 | 2 13/16 | 91509450 | 169.5 | 3.12:1 |
NC56-77 | 196.8 | 7 3/4 | 71.4 | 2 13/16 | 91509450 | 185.3 | 2.70:1 |
NC56-80 | 203.2 | 8 | 71.4 | 2 13/16 | 91509450 | 190.1 | 3.02:1 |
6 5/8REG | 209.6 | 8 1/4 | 71.4 | 2 13/16 | 91509450 | 195.7 | 2.93:1 |
NC61-90 | 228.6 | 9 | 71.4 | 2 13/16 | 91509450 | 212.7 | 3.17:1 |
7 5/8REG | 241.3 | 9 1/2 | 76.2 | 3 | 91509450 | 223.8 | 2.81:1 |
NC70-97 | 247.6 | 9 3/4 | 76.2 | 3 | 91509450 | 232.6 | 2.57:1 |
NC70-100 | 254.0 | 10 | 76.2 | 3 | 91509450 | 237.3 | 2.81:1 |
8 5/8Â REG | 279.4 | 11 | 76.2 | 3 | 91509450 | 266.7 | 2.84:1 |