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: 9 7/8" = 250.8mm
4) IADC code: 637
5) seal type: Elastomer sealed bearing
6) bearing type: Journal sealed bearing bit with gauge protection
7) nozzle quantity and nozzle size: 3 PCS
8) connection joint pin size: 6 5/8API reg pin
3 the feature:
Rubber sealed sliding bearing bits are sealed by special type "o". Under the normal rotary speed conditions, they can stand high bit pressure. The bore surface of the cone has been treated with special techniaue in order to improve sliding motion of the bearing. And every performance is improved greatly.
1 o-shape seal ring with high saturation butadience acrylonitrile rubber improved the bearing sealed reliability.
2 to adapt high strength and toughness hard alloy teeth, the shock resistance has been increased and the breakage rate has been decreased.
3 the bearing contact surface, neck journal of jaw have been adapted to wear resistance alloy materials, the special craft processing has been applied in the bore surface of the cone which increases the load capability and the working life.
4 optimized tooth number of cone and height of tungsten carbide tooth which improved the total cutting property and drilling footage.
5 high-performance lubricant grease has been applied in bearing which increased lubricating and protecting.
| 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. |
1. How to order the products?
Answer:
Send the inquiry with detail item description or with Model number.
If there is no packing demand we take it as sea-way packing.
If possible please attach one reference picture to avoid any misunderstanding or any links from our website for we get a better understanding.
2. About lead time and shipping time?
Answer :
The lead time depend on quantity of order. Usually shipped by sea, small order or urgent order we can send you by air after received your agreement.
According the distance from china to your port, usually from China to European about 25 days. To West of American 20 days.
3.Can I expect a quality products?
Answer :
Yes. All our activities are accredited to ISO 9001:2008 and API, both in products and services, at the same time, mature production technology ensuring the quality satisfy international request.
Audited Supplier 
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