Tigerrig SG Series Improved Sealed Roller Bearing Bit
Features：
1.Cutting Structure
The wear-resistance of teeth 1s enhanced with premium tungsten carbide hard facing on the tooth surfaces for steel tooth bit. The durability of premium tungsten carbide inserts is improved with new formulas and new techniques for insert bit.
2.Gauge Structure
Multiple gauge protection with gauge trimmers on the heel and gauge inserts on the gauge surface of the cone, tungsten carbide inserts and hard facing on the shirttail increases gauge holding capability and bearing life.
3.Bearing Structure
High precision roller bearing with two thrust faces. Balls lock the cone. The leg bearing can get larger by arranging the rollers in groove of the cone hole, so it can receive more WOB, and suitable for high RPM. Thrust faces hard faced with wear resistant alloy. Abrasion resistance and seizure resistance of the bearing are improved.
4.Seal And Lubrication
Premium HNBR 0-ring, optimal seal compression and curved seal structure can enhance the seal performance. The pressure compensator system and advanced grease can greatly increase the lubricating reliability.
5.Product Application
It can receive higher WOB and faster rotary speed than conventional roller bearing bits. It is suitable for high RPM applications.
Current Availability
Bit Size
Bit Type
in
mm
16
406.4
SGT115GW
17 1/2
444.5
SGT115GW SG125G SG135G SGT435G SGT515G SGT525G SGT535G SGT545G SGT615G SGT625G SGT635G
20
508.0
SG125CGW SG215CGW
Recommended Drilling Parameters
IADC
WOB
(KN/mm) (Bit Dia.)
RPM(r/min)
Applicable Formation
115
0.3~0.75
200~ 80
Very soft formations with low compressive strength and high drill ability, such as clay, mudstone, chalk, etc.
125
0.3~ 0.85
Soft formation with low compressive strength and high drill ability, such as mudstone, gypsum, salt, soft shale, soft limestone, etc.
135
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.
215
0.35~0.95
Medium formations with high compressive strength, such as medium soft shale, anhydrite, medium soft limestone, medium soft sandstone, medium formation with harder interbed, etc.
435 445
150~ 60
515 525
0.3~ 0.8
535 545
0.35~0.9
Soft to medium soft formations with low compressive strength, such as medium soft shale, medium soft limestone, medium soft sandstone, medium formation with harder abrasvier interbed, etc.
615 625
0.35~1.0
Medium hard formations with high compressive strength, such as hard shale, limestone, sandstone, dolomite, etc.
635
0.4~1.1
Hard formations with high compressive strength, such as sandstone, limestone, dolomite, anhydrite, marble, etc.