Drag Bits
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Applications:
Drag bits are suitable for the drilling of some softer layers of rock formations, such as carbonatite, limestone, chalks, clay rocks, siltstone, sandstone and so on. Compared with the common drilling bits, the drilling result of the drag bits is superior.
Features:
- The drag bits are durable: Using the diamond compact cutters for cutting, the service life is 10 times longer than tungsten carbide bits, and 4-5 times longer than common diamond bits.
- The drag bits can drill with low pressure and low speed rate: The rock drilling bits shear rock with a continuous scraping motion, the drilling stress is 1/3 of the impregnated diamond bit with the same diameter.
- The drilling cost is greatly reduced because of its high penetration rate, long lifespan, purposeful drilling, and lower drilling times.
Parameters:
DRAG BITS
| Thread Type No. | Bit diameter | Thread | |
| mm | in | ||
| NC | 65 | 2-7/8 | 23 |
| API REG | 77 | 3-3/4 | 2-3/8 |
| API REG | 102 | 4-3/4 | 2-3/8 |
| API REG | 113 | 4-7/16 | 2-3/8 |
| API REG | 127 | 5 | 2-3/8 |
| API REG | 133 | 5-1/4 | 3-1/2 |
| API REG | 152 | 6 | 3-1/2 |
| API REG | 177 | 7 | 4-1/2 |
| API REG | 203 | 8 | 4-1/2 |
| API REG | 228 | 9 | 5-1/2 |
| API REG | 254 | 10 | 6-5/8 |
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