| Customization: | Available |
|---|---|
| Customized: | Customized |
| Standard: | API |
|
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IADC
|
WOB(KN/mm Bit Dia.)
|
RPM(r/min)
|
Applicable Formations
|
|
435
515 |
0.20~0.70
|
200~80
|
Soft with very low compressive strength such as shale ,clay, sandstone ,soft limestone ,etc
|
|
535
|
0.35~0.80
|
200~80
|
Medium soft with low compressive strength and harder abrasive stringers ,such as hard shale ,hared gypsolyte, soft limestone,
sandstone and dolomite with stringer ,etc |
|
417
437 |
0.35~0.90
|
140~70
|
Very soft with low compressive strength and high drillability, such as shale, clay, sandstone and conglomerate ,etc.
|
|
517
527 |
0.35~1.05
|
120~50
|
Soft with low compressive strength, such as shale, clay, sandstone, soft limestone, salt bed and hard gypsolyte, etc
|
|
537
547 |
0.35~1.05
|
110~40
|
Medium soft with low compressive strength and harder abrasive stringers, such as hard shale, hard gypsolyte, soft limestone,
sandstone and dolomite with stringers ,etc |
|
617
627 |
0.35~1.05
|
80~40
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Medium hard with high compressive strength and thick &hard stringers, such as hard shale, limestone, sandstone and dolomite, etc
|
|
637
737 |
0.70~1.20
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70~40
|
Medium hard with high compressive strength and high abrasiveness ,such as limestone ,dolomite, sandstone and chert ,etc
|
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Note: The upper limits of WOB and RPM in above table should not be used simultaneously
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Company Competitive Power:
1.the most professional and experienced senior engineers in this field
guarantee high quality products.
2.MANUFACTURER position ensures competitive price.
3.Sincere salesmen are our business basis.
4.Different sizes and dimensions are available
5.A certain number of bulk stock ensures fast delivery
6.Best after-sales service
Welcome to inquiry and visit our factory
Guarantee and Warranty of Quality:
We are ISO certified factory, we have one integral set of system to control quality in production and make after-sale service.
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