| Customization: | Available |
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| Customized: | Customized |
| Standard: | API |
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Sealed Bearing Structure:Air cooling roller bearing package. Balls lock the conewhich reduces the probability of cone-dropping to minimum.
Main Type Available:Size: 5 7/8",6",6 1/2",7 1/2",7 7/8",8 1/2",9 1/2",9 5/8",9 7/8",12 1/4",14 3/4",17 1/2", etc.
IADC Code:1-- Series, 2-- Series, 3-Series
3. Non-Sealed Roller Bearing Steel Tooth Bit
Cutting Structure: The wear-resistance of teeth is enhanced with premium tungsten carbide hard facing on the tooth surfaces.
Bearing Structure: on-sealed roller bearing. Drilling fluid can enter the bearing directly for cooling; Balls lock the cone which reduces the probability of cone Cropping to minimum
Main Type Available: Size: 2 3/8",3",3 5/8:",3 7/8",4",4 1/2",4 5/8",4 3/4",6",6 1/2",7 1/2",7 7/8",8 1/2",9 1/2",9 5/8",9 7/8",10 5/8",12 1/4", 17 1/2",etc.
IADC Code:1-- Series,2-- Series,3-- Series
4.Metaled sealed Journal Bearing Steel Tooth Bit
Main Type Available: Size: 2 3/8",3",3 5/8:",3 7/8",4",4 1/2",4 5/8",4 3/4",6",6 1/2",7 1/2", 7 7/8",8 1/2",9 1/2" ,9 5/8",9 7/8",10 5/8",12 1/4", 17 1/2",etc.
IADC Code: 1-- Series,2-- Series,3-- Series
| IADC |
WOB (KN/mm) |
RPM (r/min) |
Applicable Formations |
| 437/447/435 | 0.35~0.9 | 240~70 |
Very soft formations with low compressive strength and high drillability, such as clay, mudstone, chalk, gypsum, salt, soft limestone, etc. |
| 517/527/515 | 0.35~1.0 | 220~60 |
Soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft limestone, etc. |
| 537/547/535 | 0.45~1.0 | 220~50 |
Soft to medium formations with low compressive strength, such as medium, soft shale, medium soft limestone, medium soft sandstone, medium formation with harder and abrasive interbeds, etc. |
| 617/615 | 0.45~1.1 | 200~50 |
Medium hard formation with high compress strength, such as hard shale, limestone, sandstone, dolomite. etc |
| 637/635 | 0.5~1.1 | 180~40 |
Hard formations with high compressive strength, such as sandstone, limestone, dolomite ,hard gypsum, marble, etc. |
| Note: The upper limits of WOB and RPM in above table should not be used simultaneously. | |||
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