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Technical Specifications

 

11 5/8 R6

Diameter: 295.3mm (11 5/8")  
IADC Code: 231  
Design number: UT382  
State standard designation: СТ-ЦГВ  
 

Specification

Gradient angle of axle journal 33°
Axle journal offset relative to drill bit axis 4.80 mm
Bearing type Roller bearing
Sealing None
Total number of inserts (inner/heel row) 130 (73/57)
Total number of insert rows (inner/heel row) 11 (8/3)
Number of changeable nozzles 4
Connecting thread З-152 (6 5/8 REG)
Drill bit net weight, kg 71.00
Drill bit gross weight, kg 73.80
 

Recommended Drilling Conditions

Rotation speed 600-40 rpm
Thrust load 10.00-26.00 t (22000 - 57200 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 medium hard formations with hard streaks
 

Design Features









 

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