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Technical Specifications


6 3/4 MC20

Diameter: 171.4mm (6 3/4")  
IADC Code: 212C  
Design number: T148  
State standard designation: С-ПВ  


Gradient angle of axle journal 36°
Axle journal offset relative to drill bit axis 3.20 mm
Bearing type Roller bearing
Sealing None
Total number of inserts (inner/heel row) 86 (45/41)
Total number of insert rows (inner/heel row) 8 (5/3)
Number of changeable nozzles 0
Connecting thread З-88 (3 1/2 REG)
Drill bit net weight, kg 14.80
Drill bit gross weight, kg 15.80

Recommended Drilling Conditions

Rotation speed 115-60 rpm
Thrust load 5.00-13.00 t (11000 - 28600 lbs)
The lower level of rotation speed value corresponds the upper level of thrust load value and vice versa.


The drill bit is designed for drilling medium hard formations

Design Features


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