6-3/4 Inch IADC537 Milled Tooth Drill Bit For Water Well Drilling , Long Life
6-3/4 Inch IADC537 Milled Tooth Drill Bit For Water Well Drilling , Long Life
Cutting Structure
The wear-resistance of teeth is enhanced with premium tungsten carbide hardfacing 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.
Gauge Structure
Multiple gauge protection with gauge trimmers on the heel of cone,tungsten carbide inserts and hardfacing on the shirttail increases gauge holding capability and bearing life.
Bearing Structure
High precision journal bearing with two thrust faces.Balla lock the cone.Hardfaced head bearing surfaces.Cone bearing inlaid with friction-reducing alloy and then silver-plated.Abrasion resistance and seizure resistance of the bearing are improved.
Seal and Lubrication
Premium HNBR O-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 rellability.
Product Application
It can receive high WOB in the conventional drilling.It is suitable for various formations by matching cutting structure with different tooth shape,tooth density ans tooth exposure height.
Recommended Drilling Parameters
| IADC | WOB (weight on bit dia) | RPM(R/Min) | Application Formation |
| 517 527 | 0.35-1.0 | 140-60 | Soft formation with low compressive strength and high drillability.such as mudstone.gypsum.salt.soft shale.soft limestone.etc. |
| 537 547 | 0.45-1.0 | 120-50 | 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 interbed,etc. |
| 617 627 | 0.45-1.1 | 90-50 |
Medium hard formations with high compressive strength.such as hard shale.limestone,sandstone.dolomite.etc. |
| 637 | 0.5-1.2 | 80-40 | Hard formations with high compressive strength.such as sandstone.limestone,dolomite. anhydrite.marble.etc. |
| Note:The upper limits of WOB and RPM in above table should not used simultaneously. | |||
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