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Technical Specifications


3 2/3 T7

Diameter: 93.0mm (3 2/3")  
IADC Code: 311C  
Design number: UT16  
State standard designation: Т-ЦА  


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) 62 (29/33)
Total number of insert rows (inner/heel row) 7 (4/3)
Number of changeable nozzles 0
Connecting thread З-50 (-)
Drill bit net weight, kg 2.90
Drill bit gross weight, kg 3.40

Recommended Drilling Conditions

Rotation speed 100-40 rpm
Thrust load 6.00-11.00 t (13200 - 24200 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 hard formations

Design Features

Central flushing.


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