1 company introduction:
We guaranteed products at a competitive price and high quality. At present, our products have a very good sale in
Domestic and overseas market. We wish to cooperate with you to create a bright future and mutual benefit. Much appreciation for your prompt attention in advance, we are eager to look forward to hearing from you soon.
2 product introduction:
1) condition: 100% new
2) the exact bit size: 98 to 660.4mm
4) IADC code: 617/627
5)wob: 0.45-1.1kn/mm
6)rpm: 90-50r/min
7) seal type: Elastomer sealed bearing
8) bearing type: Journal sealed bearing bit with gauge protection
9) nozzle quantity and nozzle size: 3 PCS
3 the feature:
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 and gauge inserts on the gauge surface of the 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. Balls lock the cone. Hardraced head bearing surface. Cone bearing inlaid with friction-reducing alloy and then silver-plated. Abrasion resistance and seizure resistance of the bearing are improved, and suitable for high rotary speed.
| IADC |
WOB(KN/mm) |
RPM(r/min) |
Applicable Formations |
| 417/427 |
0.3-0.9 |
150-70 |
very Soft formation with low compressive strength and high drillability,such as clay,soft mudstone,shale,salt,loose sands,etc. |
| 437/447 |
0.35-0.9 |
150-70 |
very Soft formation with low compressive strength and high drillability,such as clay,soft mudstone,shale,salt,loose sands,etc. |
| 515/525 |
0.35-0.9 |
180-60 |
very Soft formation with low compressive strength and high drillability,such as mudstone,salt,soft limestone, sands,etc. |
| 517/527 |
0.35-1.0 |
140-50 |
Soft formation with low compressive strength and high drillability,such as mudstone,salt,soft limestone,sands,etc |
| 535/545 |
0.35-1.0 |
150-60 |
medium soft with harder formation, more abrasive streaks,such as hard shale,mudstone,soft limestone,etc. |
| 537/547 |
0.4-1.0 |
120-40 |
medium soft with harder formation, more abrasive streaks,such as hard shale,mudstone,soft limestone,etc. |
| 617/627 |
0.45-1.1 |
90-50 |
medium hard with higher compressive strength as well as thick and hard streaks,such as hard shale,sands,limestone,dolomite,etc. |
| 637 |
0.5-1.2 |
80-40 |
medium hard with higher compressive strength as well as thick and hard streaks,such as hard shale,sands,limestone,dolomite,etc. |
| 737 |
0.7-1.2 |
70-40 |
Hard with high abrasiveness such as hard limestone,dolomite,firm sands,etc |
| 827/837 |
0.7-1.2 |
70-40 |
very hard with high abrasiveness,such as quartzite,quaruzite sand,chert,basalt,granite,etc. |
Audited Supplier 
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