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Technical Specifications


7 3/8 M50

Diameter: 187.3mm (7 3/8")  
IADC Code: 522Y  
Design number: T197  
State standard designation: МЗ-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) 98 (61/37)
Total number of insert rows (inner/heel row) 10 (7/3)
Number of changeable nozzles 3
Connecting thread 3-88 (3 1/2 REG)
Drill bit net weight, kg 22.80
Drill bit gross weight, kg 24.30

Recommended Drilling Conditions

Rotation speed 115-60 rpm
Thrust load 3.00-13.00 t (6600 - 28600 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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