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Technical Specifications


3 MC30

Diameter: 76.0mm (3")  
IADC Code: 312C  
Design number: T147  
State standard designation: Т-ПА  


Gradient angle of axle journal 38°
Axle journal offset relative to drill bit axis 0.50 mm
Bearing type Journal bearing
Sealing None
Total number of inserts (inner/heel row) 60 (27/33)
Total number of insert rows (inner/heel row) 7 (4/3)
Number of changeable nozzles 0
Connecting thread 3-42 (-)
Drill bit net weight, kg 1.50
Drill bit gross weight, kg 2.00

Recommended Drilling Conditions

Rotation speed 115-60 rpm
Thrust load 3.00-6.00 t (6600 - 13200 lbs)
The lower level of rotation speed value corresponds the upper level of thrust load value and vice versa.



Design Features


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