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Technical Specifications

 

7 7/8 RS45

Diameter: 200.0mm (7 7/8")  
IADC Code: 625X  
Design number: UT18-1  
State standard designation: ТЗ-ГНУ  
 

Specification

Gradient angle of axle journal 36°
Axle journal offset relative to drill bit axis 3.20 mm
Bearing type Roller bearing
Sealing Elastomer
Total number of inserts (inner/heel row) 121 (81/40)
Total number of insert rows (inner/heel row) 12 (9/3)
Number of changeable nozzles 3
Connecting thread З-117 (4 1/2 REG)
Drill bit net weight, kg 31.80
Drill bit gross weight, kg 33.30
 

Recommended Drilling Conditions

Rotation speed 200-40 rpm
Thrust load 6.00-16.00 t (13200 - 35200 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 hard abrasive formations
 

Design Features









 

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