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Core bits are purposed to core recovery in soft rocks, interstratified with layers of medium rock formations of III-IV category of hardness

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.

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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