Download PDF

Technical Specifications

 

14 3/4 RS4

Diameter: 374.6mm (14 3/4")  
IADC Code: 215  
Design number: UT535  
State standard designation: С-ЦГВУ  
 

Specification

Gradient angle of axle journal 36°
Axle journal offset relative to drill bit axis 6.40 mm
Bearing type Roller bearing
Sealing Elastomer
Total number of inserts (inner/heel row) 186 (122/64)
Total number of insert rows (inner/heel row) 11 (8/3)
Number of changeable nozzles 4
Connecting thread З-177 (7 5/8 REG)
Drill bit net weight, kg 136.00
Drill bit gross weight, kg 140.40
 

Recommended Drilling Conditions

Rotation speed 300-40 rpm
Thrust load 11.00-26.00 t (24200 - 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
 

Design Features

Combined circulation (central and side) for which the screw from the central unit must be unscrewed

The leg shirttail and entering edge are hardfaced with tungsten carbide

The leg is protected with tungsten carbide inserts

Tungsten carbide inserts on cone gage

 

Views: 1331