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Technical Specifications


12 5/8 M30

Diameter: 320.0mm (12 5/8")  
IADC Code: 312  
Design number: T114  
State standard designation: Т-ПГВ  


Gradient angle of axle journal 36°
Axle journal offset relative to drill bit axis 0.50 mm
Bearing type Roller bearing
Sealing None
Total number of inserts (inner/heel row) 193 (118/75)
Total number of insert rows (inner/heel row) 11 (8/3)
Number of changeable nozzles 3
Connecting thread 3-152 (6 5/8 REG)
Drill bit net weight, kg 89.00
Drill bit gross weight, kg 91.80

Recommended Drilling Conditions

Rotation speed 115-60 rpm
Thrust load 13.00-27.00 t (28600 - 59400 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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