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Technical Specifications

 

15 1/2 R35

Diameter: 393.7mm (15 1/2")  
IADC Code: 543X  
Design number: UT274  
State standard designation: СЗ-ЦГВ  
 

Specification

Gradient angle of axle journal 36°
Axle journal offset relative to drill bit axis 6.40 mm
Bearing type Roller bearing
Sealing None
Total number of inserts (inner/heel row) 183 (131/52)
Total number of insert rows (inner/heel row) 16 (13/3)
Number of changeable nozzles 4
Connecting thread З-177 (7 5/8 REG)
Drill bit net weight, kg 156.00
Drill bit gross weight, kg 160.40
 

Recommended Drilling Conditions

Rotation speed 600-40 rpm
Thrust load 17.00-29.00 t (37400 - 63800 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 abrasive formations
 

Design Features

Combined circulation (central and side), for which it is necessary to unscrew the screw from the central unit.

The leg shirttail and entering edge are hardfaced with tungsten carbide

Tungsten carbide inserts on cone gage.



 

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