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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4 1/4" FA216 , Steel Tooth Tricone Bit , Sealed Journal Bearing , Milled Tooth Bit , Drilling Bit , Deeper Section
PRODUCT SPECIFICATIONS
Bit Size: 4 1/4 inch ( 108 mm)
IADC: 216
SERIES: FA
Tooth type: Milled Tooth / Steel Tooth
Connection: 2 3/8 inch API REG PIN
Nozzle: three jet(side) nozzles
Bit Weight: 6 kgs
RECOMMENDED DRILLING PARAMETERS FOR APPLICATION
| Types & IADC Code | 116 117 | 126 127 | 136 137 | 216 217 | 246 247 | 326 327 | |
| WOB | KN/mm(Bit Dia.) | 0.48~1.0 | 0.48~1.0 | 0.48~1.0 | 0.4~1.0 | 0.4~1.0 | 0.55~0.85 |
| Lb/in. (Bit Dia.) | 2742~5714 | 2742~5714 | 2742~5714 | 2285~5714 | 2285~5714 | 3140~4860 | |
| Rotation Speed (Rpm) | 160~80 | 150~70 | 130~60 | 100~60 | 80~50 | 60~45 | |
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 lowermost 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
