Overburden Drilling
Overburden drilling systems are designed for economic cost of drilling in simultaneous casing advancement.
Technical Data of Overburden Drilling
Inner Opener Bits | Crown Opener Bits | External Pipe | Internal Pipe | Internal/External Pipe and Adapter | Small/Big Adapter | |
| 118 Overburden Drilling | ||||||
| Diameter(mm) | ø 127 | ø 82 | ø 118 | ø 76 (ø 73) | ø 75/ø 118 | ø 75/ø 118 |
Length (mm) | - | - | 2000 | 2000 | 250/300 | 350 |
| Thread | R104-2/3 | R56 | R104-2/3 | R56 | R56/R104-2/3 | |
| 133 Overburden Drilling | ||||||
| Diameter(mm) | ø 142 | ø 102 | ø 133 | ø 76 (ø 73) | ø 75/ø 133 | ø 75/ø 118 |
Length (mm) | - | - | 2000 | 2000 | 250/300 | 350 |
| Thread | R122-2/3 | R56 | R122-2/3 | R56 | R56/R122-2/3 | |
| 146 Overburden Drilling | ||||||
| Diameter(mm) | ø 156 | ø 115 | ø 146 | ø 76 (ø 73) | ø 75/ø 146 | ø 75/ø 146 |
Length (mm) | - | - | 2000 | 2000 | 250/300 | 350 |
| Thread | R122-2/3 | R56 | R122-2/3 | R56 | R56/R122-2/3 | |
| 165 Overburden Drilling | ||||||
| Diameter(mm) | ø 175 | ø 135 | ø 165 | ø 89 | ø 89/ø 165 | ø 89/ø 165 |
Length (mm) | - | - | 2000 | 2000 | 250/300 | 350 |
| Thread | R152-2/3 | R78 | R152-2/3 | R78 | R78/R152-2/3 | |
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