| Customized: | Customized |
|---|---|
| Standard: | API |
| Type: | Center Drill Bit |
|
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Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
| 417,437,447 | 0.35~0.9 | 150~70 | Extremely soft formation with low compressive strength and high drillability,such as clay,mudstone,cretaceous,gypsum,salinastone,soft shale and soft limestone |
| 517,527 | 0.35~1.0 | 140~60 | soft formation with low compressive strength ,such as mudstone,gypsum,salinastone,soft shale and soft limestone |
| 537,547 | 0.45~1.0 | 120~50 | ,,, Soft to medium formation with low compressive strength,such as mid-soft shale,mid -soft limestone,mid-soft sandstone and medium formation with harder abrasiveness interbeds |
| 617,627 | 0.45~1.1 | 90~50 | Mid-hard formation with high compressive strength,such as hard shale,limestone,sandstone,and dolomite |
| 637 | 0.5~1.2 | 80~40 | Hard formation with high compressive strength,such as sandstone,limestone,dolomite and anhydrite,marble |
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