Active Member
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[China]
Address: B2-0645 ROOM, CENTURY-TEA-TRADE-CENTER, NO.10 MALIANDAO ROAD, XUANWU DISTRICT, BEIJING, CHINA
Contact name:Jade
FLRT Bit |
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Rubber Sealed Roller Bearing , With Gage Protection , TCI Tricone Bit , Fluid Circulation , Drill with Mud Pump
SIZE AVAILABLE
Form 3 7/8inch to 18 1/2inch
RECOMMENDED DRILLING PARAMETERS FOR APPLICATION
| Types & IADC Code | 417 | 437 447 | 517 527 | 537 547 | 617 627 | 637 | |
| WOB | KN/mm(Bit Dia.) | 0.4~0.9 | 0.4~0.9 | 0.35~1.0 | 0.5~1.0 | 0.6~1.1 | 0.7~1.2 |
| Lb/in. (Bit Dia.) | 2285~5142 | 2285~5142 | 2000~5714 | 2857~5714 | 3428~6285 | 4000~6857 | |
| Rotation Speed (Rpm) | 140~60 | 140~60 | 125~50 | 110~50 | 100~40 | 80~40 | |
The above chart represents commonly available sizes and types, we do produce other sizes and types of rock bits which do not appear on this list. Please contact us for more information.
Friction bearing
- Nose and outer bearing replaced by friction bearing
- Bearing lubrication
- Bearing classified as sealed or non sealed
- Non sealed are lubricated by mud system through the face where
the cone meets the journal
- Sealed are lubricated by custom made system built within the leg
body
- Lubrication by mud is generally recommended
- Sealed bearing consists of bearing, seal, reservoir and pressure
compensator
- The seal is an O-ring type placed at the contact between the cone
and the bearing lower most point
- The reservoir provides lubricants (special grease) to the bearing
through a passageway in the leg
- Pressure compensator has a flexible diaphragm operates within a
metal protector
- Maintains equal pressure inside and outside bearings
- Equipped with a pressure relief valve
- It protect the bearing seal when heat cause breakdown of grease
into gaseous components
