Core bits are purposed to core recovery in soft rocks, interstratified with layers of medium rock formations of III-IV category of hardness
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Distinctive feature: better core removal due to smooth rock cutting with PDC cutters. Flushing holes are carried outside core catchers in order to prevent core damage by drilling fluid. Modifications: are equipped with additional inserts with impregnated diamonds to increase tool resistance.
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Dimension acc. to new nomenclature |
Outside diameter, mm/In |
Core
diameter,
mm/In |
Code
IADC |
Coupling thread |
Dimension acc. to old nomenclature |
| 35/22 Â 68 |
35 |
22 |
S342 |
Ì30 |
35/22 ÌÑ |
| 120/67 Â 613 |
120 |
67 |
S334 |
ÌÊ104 (special) |
120/67 ÌÑ |
| 120,6/58 Â 613 |
120,6 |
58 |
S332 |
ÌÊ105 (special) |
120,6/58 ÌÑ2 |
| 138,1/52 Â 613 |
138,1 |
52 |
S333 |
Ç-110 |
138,1/52 ÌÑ |
| 138,1/67 Â 613 |
138,1 |
67 |
S333 |
Ç-110 |
138,1/67 ÌÑ |
| 138,1/80 Â 613 |
138,1 |
80 |
S333 |
ÌÊ-117 |
138,1/80 ÌÑ |
| 149/69 Â 613 |
149 |
69 |
S332 |
Ì113õ3 |
149/69 ÌÑ |
| 158,7/67 Â 613 |
158,7 |
67 |
S334 |
Ç-110 |
158,7/67 ÌÑ2 |
| 187,3/80 Â 613 |
187,3 |
80 |
S333 |
Ç-150 |
187,3/80 ÌÑ |
| 187,3/100 Â 613 |
187,3 |
100 |
S333 |
Ç-161 |
187,3/100 ÌÑ |
| 188,9/80 Â 613 |
188,9 |
80 |
S333 |
Ç-150 |
188,9/80 ÌÑ |
| 188,9/100 Â 613 |
188,9 |
100 |
S333 |
Ç-161 |
188,9/100 ÌÑ |
| 212/80 Â 613 |
212 |
80 |
S333 |
Ç-150 |
212/80 ÌÑ |
| 212/100 Â 613 |
212 |
100 |
S333 |
Ç-161, ÌÊ-180 Ñp |
212/100 ÌÑ |
| 212,7/80 Â 613 |
212,7 |
80 |
S333 |
Ç-150 |
212,7/80 ÌÑ |
| 212,7/100 Â 613 |
212,7 |
100 |
S333 |
Ç-161 |
212,7/100 ÌÑ |
| 214,3/80 Â 613 |
214,3 |
80 |
S333 |
Ç-150 |
214,3/80 ÌÑ |
| 214,3/100 Â 613 |
214,3 |
100 |
S333 |
Ç-161 |
2154,3/100 ÌÑ |
| 215,9/80 Â 613 |
215,9 |
80 |
S333 |
Ç-150 |
215,9/80 ÌÑ |
| 215,9/100 Â 613 |
215,9 |
100 |
S333 |
Ç-161, ÌÊ-180 Ñp |
215,9/100 ÌÑ |
| 292,9/100 Â 613 |
292,9 |
100 |
S333 |
Ç-161 |
292,9/100 ÌÑ |
| 295,3/100 Â 613 |
295,3 |
100 |
S333 |
Ç-161 |
295,3/100 ÌÑ |
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