Drill Collar
Drill Collars are integral heavy-wall joints that are manufactured from a solid bar of modified alloy steel. The solid bars are quenched and tempered to obtain the required mechanical properties, then trepanned, drifted and threaded. All drill collars are heat-treated with hardness within 285 to 341 BHN, which are guaranteed one inch below the surface of the pipe.
We could supply slick type drill collar, spiral drill collar and Non-magnetic drill collar (NMDC).
| Number and connection table | Outside Diameter | Inside Diameter | Length | Bevel Diameter | Bending Strength Ratio | ||
| mm | in | mm | in | mm | mm | ||
| NC23-31 | 79.4 | 3-1/8 | 31.8 | 1-1/2 | 9150 | 76.2 | 2.57:1 |
| NC26-35 (2-3/8 IF) | 88.9 | 3-1/2 | 38.1 | 1-1/2 | 9150 | 82.9 | 2.42:1 |
| NC31-41 (2-7/8 IF) | 104.8 | 4-1/8 | 50.8 | 2 | 9150 | 100.4 | 2.43:1 |
| NC35-47 | 120.6 | 4-3/4 | 50.8 | 2 | 9150 | 114.7 | 2.58:1 |
| NC38-50 (3-1/2 IF) | 127 | 5 | 57.2 | 2-1/4 | 9150 | 121 | 2.38:1 |
| NC44-60 | 152.4 | 6 | 57.2 | 2-1/4 | 9150 or 9450 | 144.5 | 2.49:1 |
| NC44-60 | 152.4 | 6 | 71.4 | 2-13/16 | 9150 or 9450 | 144.5 | 2.84:1 |
| NC44-62 | 158.8 | 6-1/4 | 57.2 | 2-1/4 | 9150 or 9450 | 149.2 | 2.91:1 |
| NC44-62 (4 IF) | 158.8 | 6-1/2 | 71.4 | 2-13/16 | 9150 or 9450 | 150 | 2.63:1 |
| NC44-65 (4 IF) | 165.1 | 6-1/2 | 57.2 | 2-1/4 | 9150 or 9450 | 154.8 | 2.76:1 |
| NC44-65 (4 IF) | 165.1 | 6-1/2 | 71.4 | 2-13/16 | 9150 or 9450 | 154.8 | 3.05:1 |
| NC44-67 (4 IF) | 171.4 | 6-3/4 | 57.2 | 2-1/4 | 9150 or 9450 | 159.5 | 3.18:1 |
| NC50-67 (4-1/2IF) | 171.4 | 6-3/4 | 71.4 | 2-13/16 | 9150 or 9450 | 159.5 | 2.37:1 |
| NC50-70 (4-1/2IF) | 177.8 | 7 | 57.2 | 2-1/4 | 9150 or 9450 | 164.7 | 2.54:1 |
| NC50-70 (4-1/2IF) | 177.8 | 7 | 71.4 | 2-13/16 | 9150 or 9450 | 164.7 | 2.73:1 |
| NC50-72 (4-1/2IF) | 184.2 | 7-1/4 | 71.4 | 2-13/16 | 9150 or 9450 | 169.5 | 3.12:1 |
| NC56-77 | 196.8 | 7-3/4 | 71.4 | 2-13/16 | 9150 or 9450 | 185.3 | 2.70:1 |
| NC56-80 | 203.2 | 8 | 71.4 | 2-13/16 | 9150 or 9450 | 190.1 | 3.02:1 |
| 6-5/8 REG | 209.6 | 8-1/4 | 71.4 | 2-13/16 | 9150 or 9450 | 195.7 | 2.93:1 |
| NC61-90 | 228.6 | 9 | 71.4 | 2-13/16 | 9150 or 9450 | 212.7 | 3.17:1 |
| 7-5/8 REG | 241.3 | 9-1/2 | 76.2 | 3 | 9150 or 9450 | 223.8 | 2.81:1 |
| NC70-97 | 247.6 | 9-3/4 | 76.2 | 3 | 9150 or 9450 | 232.6 | 2.57:1 |
| NC70-100 | 254 | 10 | 76.2 | 3 | 9150 or 9450 | 237.3 | 2.81:1 |
| 8-5/8 REG | 279.4 | 11 | 76.2 | 3 | 9150 or 9450 | 266.7 | 2.84:1 |
Slips and elevator grooves can be produced upon the customers' requirements.
Information
Post type
Sell
Condition
New
Location
China
Post uploaded
7 months ago
