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Technical Specifications

 

6 1/4 T5

Diameter: 158.7mm (6 1/4")  
IADC Code: 221C  
Design number: UT100-2  
State standard designation: С-ЦН  
 

Specification

Gradient angle of axle journal 36°
Axle journal offset relative to drill bit axis 3.20 mm
Bearing type Roller bearing
Sealing None
Total number of inserts (inner/heel row) 86 (45/41)
Total number of insert rows (inner/heel row) 8 (5/3)
Number of changeable nozzles 0
Connecting thread З-88 (3 1/2 REG)
Drill bit net weight, kg 13.50
Drill bit gross weight, kg 14.30
 

Recommended Drilling Conditions

Rotation speed 300-40 rpm
Thrust load 5.00-12.00 t (11000 - 26400 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
 

Design Features









 

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