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Technical Specifications
17 1/2 RS3
Diameter:
444.5mm (17 1/2")
IADC Code:
135
Design number:
UT285
State standard designation:
МС-ЦГВУ
Specification
Gradient angle of axle journal
33°
Number of blades
0
Axle journal offset relative to drill bit axis
7.10 mm
Type of diamond inserts
Bearing type
Roller bearing
Total number of PDC inserts (cutting/gauge)
0 (0/0)
Sealing
Elastomer
Total number of PDC inserts for back reaming
0
Total number of inserts (inner/heel row)
116 (62/54)
Total number of inserts (inner/heel row)
0 (0/0)
Total number of antivibration inserts
0
Total number of insert rows (inner/heel row)
9 (6/3)
Total number of insert rows (inner/heel row)
0 (0/0)
Number of changeable nozzles
4
Number of changeable nozzles
4
Connecting thread
З-177 (7 5/8 REG)
Connecting thread
З-177 (7 5/8 REG)
Drill bit height, mm
0.0
Drill bit net weight, kg
212.00
Drill bit gross weight, kg
239.50
Recommended Drilling Conditions
Rotation speed
300-40 rpm
Thrust load
8.00-31.00 t (17600 - 68200 lbs)
Drilling fluid consumption
0.00-0.00 l/s
Recommended make-up torque
0.00-0.00 kNm
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 soft formations with medium hard streaks
Design Features
Combined circulation (central and side) for what the screw from the central unit must be unscrewed.
The shirttail and leg entering edge are hardfaced with tungsten carbide
The leg is protected with tungsten carbide inserts
Complete coverage of all cone teeth with a hard alloy.
Tungsten carbide inserts on cone gages
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