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Technical Specifications

 

6 1/2 FS25

 Diameter: 165.1mm (6 1/2")  
IADC Code: 527X  
Design number: UT525  
State standard designation: МЗ-ГАУ  
 

Specification
Gradient angle of axle journal 33°
Axle journal offset relative to drill bit axis 4.80 mm
Bearing type Journal bearing
Sealing Elastomer
Total number of inserts (inner/heel row) 85 (51/34)
Total number of insert rows (inner/heel row) 11 (8/3)
Number of changeable nozzles 3
Connecting thread З-88 (3 1/2 REG)
Drill bit net weight, kg 18.00
Drill bit gross weight, kg 18.80
 

Recommended Drilling Conditions
Rotation speed 150-40 rpm
Thrust load 3.50-9.50 t (7700 - 20900 lbs)
The lower level of rotation speed value corresponds the upper level of thrust load value and vice versa.
 

Purpose
The drill bit is designed for drilling soft abrasive formations
 

Design Features








 

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