Special bits of BP type
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Special bits of BP type are purposed for reaming and calibrating well shafts in low abrasive soft and medium rock formations with high drilling rate. The bits are equipped with hard-alloyed claws and PDC cutters.
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Dimension
acc. to new nomenclature |
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Coupling thread
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Dimension
acc. to old nomenclature |
GOST 28487-90 |
API 7 |
| BP 122,5 |
122,5 |
3-76 |
27/8 Reg |
DP-122,5 C2 |
| BP 138,1 |
138,1 |
3-88 |
31/2 Reg |
DP-138,1 MC |
| BP 154,8 |
154,8 |
3-88 |
31/2 Reg |
DP-154,8 C2 |
| BP 165,1 |
165,1 |
3-88 |
31/2 Reg |
DP-165,1 MC |
| BP 214,3 |
214,3 |
3-117 |
41/2 Reg |
DP-214,3 MC |
| BP 215 |
215 |
3-117 |
41/2 Reg |
DP-215 MC, C2 |
| BP 215,9 |
215,9 |
3-117 |
41/2 Reg |
DP-215,9 MC, C2 |
| BP 220 |
220 |
3-117 |
41/2 Reg |
DP-220 MC, C2 |
| BP 295,3 |
295,3 |
3-152 |
65/8 Reg |
DP-295,3 MC, C2 |
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