Tigerrig S Series Non-Sealed Roller Bearing Bit
Features：
1.Cutting Structure
The wear-resistance of teeth is enhanced with premium tungsten carbide hardfacing on the tooth surface.
2.Bearing Structure
Non-sealed roller bearing. Drilling fluid can enter the bearing directly for cooling. Balls lock the cone which reduces the probability of cone-dropping to minimum.
3.Product Application
It is suitable for shallow well, water well and geothermal well.
Current Availability
Bit Size
Bit Type
in
mm
4 1/4
107.9
S131C S321C
4 5/8
117.5
S241C
4 3/4
120.6
5 5/8
142.9
S111 S121 S241 S321
6
152.4
S211
6 1/4
158.7
6 3/4
171.4
7 1/2
190.5
S111 S121
7 7/8
200.0
S111 S121 S131 S241 S321
9 7/8
250.8
S111 S121 S211 S241 S321
12 1/4
311.1
Recommended Drilling Parameters
IADC
WOB
(KN/mm) (Bit Dia.)
RPM(r/min)
Applicable Formation
111
0.3 ~ 0.75
200~ 80
Very soft formations with low compressive strength and high drill ability, such as clay, mudstone, chalk, etc.
121
0.3~ 0.85
Soft formation with low compressive strength and high drill ability, such as mudstone, gypsum, salt, soft shale, soft limestone, etc.
131
0.3~ 0.95
180~ 80
Soft to medium soft formations with low compressive strength and high drill ability, such as medium soft shale, anhydrite, medium soft limestone, medium soft sandstone, medium formation with harder interbed, etc.
211
0.35 ~ 0.95
180 ~ 80
Medium formations with high compressive strength, such as medium soft shale, anhydrite, medium soft limestone, medium soft sandstone, medium formation with harder interbed, etc.
241
0.35~ 0.95
180~ 70
Medium hard formations with high compressive strength, such as abrasive shale, limestone, sandstone, dolomite, anhydrite, marble, etc.
321
0.4~ 1.0
150~ 70
Hard semi-abrasive formations, such as abrasive shale, limestone, sandstone, dolomite, anhydrite, marble, etc.