Redbore 50 MDUR

The Redbore 50MDUR, has been specifically designed to provide upreaming capabilities (blind hole) while maintaining a low profile. This latest raisedrill offers:

  • More accurate and efficient transfer of power
  • Multi-directional raiseboring capabilities (conventional and upreaming)
  • Retractable wrenching arm
  • Lay-down rod handler
  • Less power required during operation
  • Up-to-date, proven, field-tested technology

Nominal capacities range from:

Upreaming: 28.5 in. (725 mm) – 5.0 ft. (1.52m) diameter with lengths up to 98.4 ft. (30 m). Conventional: 42 in. (1.07 m) – 7.0 ft. (2.13m) with lengths up to 600 ft. (183m).

Dimensions

Extended Height158-3/16” 
(4.018 m)
Retracted Height158-3/16” 
(4.018 m)
Transport Length *155-9/16”
(3.951 m)
Transport Width *94-1/2” 
(2.40 m)
Transport Height *75-13/16” 
(1.926 m)
Transport Weight *31,000 lbs 
(14 061 kg)

*(excluding base plates/pipe loader/erector)

Thrust System

Thrust System TypeHydraulic Cylinders
Maximum Pilot Hole Force50,000 lbs 
(222 kN)
Maximum Reaming Force300,000 lbs 
(1 335 kN)
Operating Pressure4,000 psi 
(275.79 Bars)

Rotation System

Rotation System TypeAC Drive 125 hp 
Electric Motor
Pilot Hole rpm0 – 80 Variable
Pilot Hole Torque15,000 ft-lbs 
(20.3 kN.m)
Reaming rpm0 – 10 Variable
Reaming Torque68,000 ft-lbs 
(92.1 kN.m)
Makeup Torque78,745 ft-lbs 
(106.3 kN.m)
Breakout Torque90,091 ft-lbs 
(122.1 kN.m)

Drill String

Raise Angle Range45º to Vertical
Pilot Hole Diameter11”
(279 mm)
Drill Pipe Diameter10” 
(254 mm)
Drill Pipe Length36” (.91 m) or 
60” (1.52 m)

(Hydraulically operated table wrench)