Complaint
| IADC code | IADC 637 |
| Bit size | 12 1/4" (311.1mm) |
| Tooth type | Wide teeth, chisel insert |
| Tricone bit dimension | 350mm*390mm*520mm |
| Bit weight | 105kg |
| Material | Tungsten carbide insert, inlaid friction-reducing alloy |
| Rotation speed | 70-40 r/min |
| WOB | 0.7~1.2 KN/mm |
| Lubrication and seal | Adopt advanced grease |
| Pressure control system | The pressure compensator |
| Thrust faces | Hardfaced with wear resistant alloy |
| Nozzles | Three nozzles, Center nozzle can be customized |
| Multiple gauge protection | Yes |
| Gauge protection | On the Shirttail: More carbide inserts increase gauge holding capability and bearing life. |
| Bearing | Elastomer sealed (rubber sealed) journal bearing |
| Metal-face sealed journal bearing | |
| Quality management system | ISO 9001-2008 |
| NO. | TRICONE ROCK BIT SIZE | API THREAD REG.PIN | |
| in | mm | ||
| 1 | 3 3/4 | 95.3 | 2 3/8 |
| 2 | 3 7/8 | 98.4 | 2 3/8 |
| 3 | 4 1/8 | 104.8 | 2 3/8 |
| 4 | 4 1/4 | 108 | 2 3/8 |
| 5 | 4 1/2 | 114.3 | 2 3/8 |
| 6 | 4 5/8 | 117.5 | 2 7/8 |
| 7 | 4 3/4 | 120.7 | 2 7/8 |
| 8 | 4 7/8 | 123.8 | 2 7/8 |
| 9 | 5 1/2 | 139.7 | 3 1/2 |
| 10 | 5 5/8 | 142.9 | 3 1/2 |
| 11 | 5 2/3 | 143.9 | 3 1/2 |
| 12 | 4 3/4 | 146.1 | 3 1/2 |
| 13 | 5 7/8 | 149.2 | 3 1/2 |
| 14 | 6 | 152.4 | 3 1/2 |
| 15 | 6 1/8 | 155.6 | 3 1/2 |
| 16 | 6 1/4 | 158.8 | 3 1/2 |
| 17 | 6 1/2 | 165.1 | 3 1/2 |
| 18 | 6 5/8 | 168.3 | 3 1/2 |
| 19 | 6 3/4 | 171.5 | 3 1/2 |
| 20 | 7 1/2 | 190.5 | 4 1/2 |
| 21 | 7 5/8 | 193.7 | 4 1/2 |
| 22 | 7 7/8 | 200 | 4 1/2 |
| 23 | 8 3/8 | 212.7 | 4 1/2 |
| 24 | 8 1/2 | 215.9 | 4 1/2 |
| 25 | 8 5/8 | 219.1 | 4 1/2 |
| 26 | 8 3/4 | 222.3 | 4 1/2 |
| 27 | 9 1/2 | 241.3 | 6 5/8 |
| 28 | 9 5/8 | 244.5 | 6 5/8 |
| 29 | 9 7/8 | 250.8 | 6 5/8 |
| 30 | 10 1/2 | 266.7 | 6 5/8 |
| 31 | 10 5/8 | 269.9 | 6 5/8 |
| 32 | 11 | 279.4 | 6 5/8 |
| 33 | 11 5/8 | 295.3 | 6 5/8 |
| 34 | 12 | 304.8 | 6 5/8 |
| 35 | 12 1/4 | 311.2 | 6 5/8 |
| 36 | 12 5/16 | 312.7 | 6 5/8 |
| 37 | 13 3/8 | 314.3 | 6 5/8 |
| 38 | 12 7/16 | 315.9 | 6 5/8 |
| 39 | 12 5/8 | 320.7 | 6 5/8 |
| 40 | 13 1/8 | 333.4 | 6 5/8 |
| 41 | 13 1/2 | 342.9 | 6 5/8 |
| 42 | 13 5/8 | 346.1 | 6 5/8 |
| 43 | 13 3/4 | 349.3 | 6 5/8 |
| 44 | 14 1/2 | 368.3 | 7 5/8 |
| 45 | 14 3/4 | 374.7 | 7 5/8 |
| 46 | 15 1/2 | 393.7 | 7 5/8 |
| 47 | 16 | 406.4 | 7 5/8 |
| 48 | 17 1/2 | 444.5 | 7 5/8 |
| 49 | 18 7/8 | 479.4 | 7 5/8 |
| 50 | 20 | 508 | 7 5/8 |
| 51 | 22 | 558.8 | 7 5/8 |
| 52 | 24 | 609.6 | 7 5/8 |
| 53 | 26 | 660.4 | 7 5/8 |
| 54 | 28 | 711.2 | 7 5/8 |
| 55 | 30 | 762 | 7 5/8 |
