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4145H Modified Steel Forged Drilling Stabilizer Collars for Oil Drilling Equipment
Specifications:
1. Material: 4145H, 4145Mod, 40CrMnMo, etc.
2. Standard size, inner diameter and thread for drill collar
| No. | Outer diameter | Inner diameter | Length | Should chamfering diameter | Bending | ||
| 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 | 2.42:1 |
| NC31-41 | 104.8 | 4 1/8 | 50.8 | 2 | 9150 9450 | 100.4 | 2.43:1 |
| NC35-47 | 120.7 | 4 3/4 | 50.8 | 2 | 9150 9450 | 114.7 | 2.58:1 |
| NC38-50 | 127.0 | 5 | 57.2 | 2 1/4 | 9150 9450 | 121.0 | 2.38:1 |
| NC44-60 | 152.4 | 6 | 57.2 |
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