Specifications
1.Standard: API 7-12.AISI 4145H or 4145H modified alloy steel
3.Strict quality assurance system
4.Reasonable price
Drill Collar
Product Explanation:Drill collars are made of AISI 4145H or 4145H modified alloy steel. And it is used between the drill pipe and the bit in the drill stem. The chemical composition should be controlled strictly during the refining and forging process. It is used to put weight on the bit so that the bit can drill.
Product types and specifications:
Drill Collar Number and Connection Label | OD | ID | Length | BD | Referenced bending Strength Ratio |
mm | mm | ||||
+1.59 | m | mm | |||
+152.4mm | |||||
NC23-31 | 79.4 | 31.8 | 9.14 | 76.2 | 2.57:1 |
NC26-35 | 88.9 | 38.1 | 9.14 | 82.9 | 2.42:1 |
NC31-41 | 104.8 | 50.8 | 9.14 / 9.45 | 100.4 | 2.43:1 |
NC35-47 | 120.6 | 50.8 | 9.14 / 9.45 | 114.7 | 2.58:1 |
NC38-50 | 127.0 | 57.2 | 9.14 / 9.45 | 121.0 | 2.38;1 |
NC44-60 | 152.4 | 57.2 | 9.14 / 9.45 | 144.5 | 2.49:1 |
NC44-60 | 152.4 | 71.4 | 9.14 / 9.45 | 144.5 | 2.84:1 |
NC44-62 | 158.8 | 57.2 | 9.14 / 9.45 | 149.2 | 2.91:1 |
NC46-62 | 158.8 | 71.4 | 9.14 / 9.45 | 150.0 | 2.63:1 |
NC46-65 | 165.1 | 57.2 | 9.14 / 9.45 | 154.8 | 2.76:1 |
NC46-65 | 165.1 | 71.4 | 9.14 / 9.45 | 154.8 | 3.05:1 |
NC46-67 | 171.4 | 57.2 | 9.14 / 9.45 | 159.5 | 3.18:1 |
NC50-70 | 177.8 | 57.2 | 9.14 / 9.45 | 164.7 | 2.54:1 |
NC50-70 | 177.8 | 71.4 | 9.14 / 9.45 | 164.7 | 2.73:1 |
NC50-72 | 184.2 | 71.4 | 9.14 / 9.45 | 169.5 | 3.12:1 |
NC56-77 | 196.8 | 71.4 | 9.14 / 9.45 | 185.3 | 2.70:1 |
NC56-80 | 203.2 | 71.4 | 9.14 / 9.45 | 190.1 | 3.02:1 |
65/8 REG | 209.6 | 71.4 | 9.14 / 9.45 | 195.6 | 2.93:1 |
NC61-90 | 228.6 | 71.4 | 9.14 / 9.45 | 212.7 | 3.17:1 |
75/8 REG | 241.3 | 76.2 | 9.14 / 9.45 | 223.8 | 2.81:1 |
NC70-97 | 247.6 | 76.2 | 9.14 / 9.45 | 232.6 | 2.57:1 |
NC70-100 | 254.0 | 76.2 | 9.14 / 9.45 | 237.3 | 2.81:1 |
85/8 REG | 279.4 | 76.2 | 9.14 / 9.45 | 266.7 | 2.84:1 |
