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Bearing Type: | Sealed Roller | Cutting Material: | Steel Tooth |
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Standard: | API-7-1, ISO 9001:2008 | Series: | FSG |
MT Bit: | Milled Tooth Bit / ST Bit | ST Bit: | Steel Tooth Bit |
High Light: | mill tooth tricone bit,steel tooth rotary bits |
311.2mm FSA124 , Rotary Drilling Bit , MT Bit , ST Bit , Tricone Bit , Sealed Roller Bearing
RECOMMENDED DRILLING PARAMETERS FOR APPLICATION
Types & IADC Code |
114 115 |
124 125 |
134 135 |
214 215 |
244 245 |
324 325 |
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WOB | KN/mm(Bit Dia.) | 0.3~0.75 | 0.3~0.85 | 0.3~0.95 | 0.35~0.95 | 0.35~0.95 | 0.4~1.0 |
Lb/in. (Bit Dia.) | 1712~4285 | 1715~4857 | 1715~5428 | 2000~5428 | 2000~5428 | 2285~5714 | |
Rotation Speed (Rpm) | 200~80 | 200~80 | 180~80 | 180~80 | 180~60 | 150~60 |
Design factors
- Bit design depend on formation properties and hole size
- Legs are same but cutters are different
- Three logs should be equally loaded
- The main design factors are Journal bearing, amount of offset,teeth, bearing and relationship between teeth and bearing
Roller-ball-friction (RBF)
- Friction type bearing at the nose
- The inner ball and outer roller as the same as RBR
- The friction consists of a special case-harden bushing pressed into the nose of the cone
- Introduced to overcome the shortcomings of RBR
- Allow thicker cone section
- Larger pin diameter
- Common for bit sizes up to 26"
Contact Person: Jade
Tel: 0086-10-63405086
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