◆ Product introduction ◆
?The types of production products include : drill collars, nonmagnetic drill collars, which can process spiral grooves and drill collars with elevator grooves and slip grooves;
?Various types of drill collars such as120.7, 158.8, 165.1, 177.8, 203.2, 209.6, 228.6, 241.3 are produced with stable quality and reliable performance. Non-standard products can also be produced according to customer needs.
◆ Technical parameter ◆
Drill collar No. and Code
|
Outside diameter
| Inner diameter | length | Shoulder chamfer diameter | Reference bending strength ratio |
mm | mm | mm | BSR” |
mm | in | +1.59 0 | ±152.4mm | ±0.4 |
|
NC23-31 | 79.4 | 31/8 | 31.8 | 9150 | 76.2 | 2.57:1 |
NC26-35 | 88.9 | 31/2 | 38.1 | 9150 | 82.9 | 2.42:1 |
NC31-41 | 104.8 | 41/8 | 50.8 | 9150 | 100.4 | 2.43:1 |
NC35-47 | 120.7 | 43/4 | 50.8 | 9150 | 114.7 | 2.58:1 |
NC38-50 | 127 | 5 | 57.2 | 9150 | 121.0 | 2.38:1 |
NC44-60 | 152.4 | 6 | 57.2 | 9150/9450 | 144.5 | 2.49:1 |
NC44-60 | 152.4 | 6 | 71.4 | 9150/9450 | 144.5 | 2.84:1 |
NC44-62 | 158.8 | 61/4 | 57.2 | 9150/9450 | 149.2 | 2.91:1 |
NC46-62 | 158.8 | 61/4 | 71.4 | 9150/9450 | 150.0 | 2.63:1 |
NC46-65 | 165.1 | 61/2 | 57.2 | 9150/9450 | 154.8 | 2.76:1 |
NC46-65 | 165.1 | 61/2 | 71.4 | 9150/9450 | 154.8 | 3.05:1 |
NC46-67 | 171.4 | 63/4 | 57.2 | 9150/9450 | 159.5 | 3.18:1 |
NC50-70 | 177.8 | 71/4 | 57.2 | 9150/9450 | 164.7 | 2.54:1 |
NC50-70 | 177.8 | 73/4 | 71.4 | 9150/9450 | 164.7 | 2.73:1 |
NC50-72 | 184.2 | 8 | 71.4 | 9150/9450 | 169.5 | 3.12:1 |
NC50-77 | 196.8 | 81/4 | 71.4 | 9150/9450 | 185.3 | 2.70:1 |
NC50-80 | 203.2 | 9 | 71.4 | 9150/9450 | 190.1 | 3.02:1 |
6 5/8REG | 209.6 | 91/2 | 71.4 | 9150/9450 | 195.6 | 2.93:1 |
NC61-90 | 228.6 | 93/4 | 71.4 | 9150/9450 | 212.7 | 3.17:1 |
7 5/8REG | 241.3 | 10 | 76.2 | 9150/9450 | 223.8 | 2.81:1 |
NC70-97 | 247.6 | 11 | 76.2 | 9150/9450 | 232.6 | 2.57:1 |
NC70-100 | 254 | 31/8 | 76.2 | 9150/9450 | 237.3 | 2.81:1 |
8 5/8REG | 279.4 | 31/2 | 76.2 | 9150/9450 | 266.7 | 2.84:1 |
