The Concentric Casing System with Three Claws is designed for high-precision drilling across diverse geological structures. It maintains drilling efficiency in complex conditions and supports various drilling angles. With minimal vibration and low noise, this system is ideal for urban environments. Available in multiple sizes and configurations, it offers reliable performance tailored to specific project needs.
| Model | D | T | H | C | G | Qty of claws | Bit shank | Weight(kg) |
|---|---|---|---|---|---|---|---|---|
| Casing tube OD(mm) | Thickness(mm) | Max OD of guide device(mm) | Reamed diameter(mm) | Max OD of normal bit(mm) | ||||
| T115 | 146 | 10 | 124 | 159 | 115 | 3 | DHD340,SD4,QL40 | 20 |
| T140 | 168 | 10 | 146 | 182 | 135 | 3 | DHD350,SD5,QL50 | 33.4 |
| 168 | 6 | 154 | 182 | 140 | 3 | DHD350,SD5,QL50 | 34.6 | |
| T145 | 178 | 10 | 156 | 192 | 145 | 3 | DHD350,SD5,QL50 | 37.4 |
| T160 | 194 | 10 | 172 | 211 | 160 | 3 | DHD360,SD6,QL60 | 49.8 |
| T168 | 203 | 10 | 180 | 232 | 168 | 3 | DHD360,SD6,QL60 | 56 |
| T190 | 219 | 10 | 196 | 242 | 185 | 3 | DHD360,SD6,QL60 | 67.2 |
| 219 | 6 | 205 | 242 | 190 | 3 | DHD360,SD6,QL60 | 72.3 | |
| T203 | 245 | 12.5 | 218 | 262 | 203 | 3 | DHD380,DHD360 | 96,83 |
| T240 | 273 | 10 | 251 | 304 | 240 | 3 | DHD380,SD8,QL80 | 124 |
| 273 | 8 | 255 | 304 | 240 | 3 | DHD380,SD8,QL80 | 125 | |
| T280 | 325 | 10 | 302 | 352 | 280 | 3 | NUMA100,DHD380 | 209,187 |
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