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Diameter : 300mm
Trenchless bit type : 3 x 8 1/2” 537 Metal seal
Connection thread : NC38
| Items | Reamer | Segments | |||
| Dia(mm) | 8 1/2 | 9 7/8 | 12 1/4 | 13 5/8 | |
| 1 | 300 | 3 | / | / | / |
| 2 | 400 | 5 | 4 | / | / |
| 3 | 500 | 6 | 5 | 4～5 | 5 |
| 4 | 600 | / | 6～7 | 5～6 | 5～6 |
| 5 | 700 | / | 7～8 | 7 | 6～7 |
| 6 | 800 | / | / | 8 | 7～8 |
| 7 | 900 | / | / | 9 | 8～9 |
| 8 | 1000 | / | / | / | 9～10 |
| 9 | 1100 | / | / | / | 10～11 |
| 10 | 1200 | / | / | / | 10～12 |
| 11 | 1300 | / | / | / | 11～13 |
| 12 | 1400 | / | / | / | 12～14 |
| 13 | 1500 | / | / | / | 14～15 |
| Note：
1) The configuration of the trenchless bit can be adjusted according to customer,Requirements,formation,drilling rig model or any other construction requirements; 2) Different types of plate or barrel centralizing structures can be applied according to customer requirements. |
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