Light-alloy double drill pipes ТБДЛ-75 (БИ 109-500.000) and steel double drill pipes ТБДС-73 (БИ 109-500.000-01) for complexes КГК are designated for boring wells with the diameter of 84 and 93 mm with the depth of up to 300 m in rocks of drillability category II-V up to drillability category VII at performing exploration and geochemical prospecting works, at geological mapping and surveying deposits of mineral resources.
Boring depth:
Technical specifications of drill string TBDL-75 (ТБДЛ-75) and TBDS-73 (ТБДС-73) |
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Designation of type&size |
Main dimensions, mm |
Pipe length L, mm |
Special cone thread |
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Pipe body |
Socket |
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External diameter D |
Wall thickness S |
External diameter D2 |
Internal diameter d1 |
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TBDL-75 / ТБДЛ-75 |
75 |
7 |
75 |
56 |
4090 |
SpK-73 / СпК-73; 70*4 |
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TBDL-73 / ТБДЛ-73 |
73 |
6 |
75 |
56 |
4090 |
SpK-73 / СпК-73; 68*4 |
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