DD-440T Maxi-Rig Directional Drills

. Posted in Maxi-Rig Directional Drills

DD440T page

Features And Benefits

  • Cummins Tier 4 final or Tier 3 (depending on country of purchase), 600 HP (447 kW) Diesel Engine
  • 440,000 lbs. (200 Tonnes) of Maximum Thrust/Pullback Power
  • Rack and Pinion (2) Pinion Drive with Adjustable Force Limiter
  • Wireless Controlled Tramming
  • 3.5 in. (76 mm) Fluid Course
  • Accommodates Range II Drill Pipe
  • 10°- 18° Variable Drilling Angle
  • Wiggle Steer®
  • Quiet-Pak® Noise Reduction System
  • Wireline commutator for speedy hookup of the wireline guidance equipment
The Wiggle Steer® System provides the operator of a directional drill the means to rotate the drill pipe and subsequently the cutting head on the drill string back and forth over a predetermined range. This back and forth motion would cause the hole made by the cutting head to be more open in a particular direction and therefore facilitate steering of the drilling pipe in that direction under ground.

The Wiggle Steer System will rotate the Drill Pipe in the Makeup (CW) direction while thrusting forward. It will then rotate the Drill Pipe in the Breakout (CCW) direction but will not thrust in the breakout direction. This method reduces the breakout torque and should prevent the drill string tool joints from parting down-hole.

DD-440T Performance Specifications

Power Train
Engine Cummins Tier 4 final or Tier 3 (depending on country of purchase) Diesel
Rating 600 HP (447 kW)
Fuel Capacity 160 U.S. Gallons (605 L)
Hydraulic Capacity 200 U.S. Gallons (757 L)
Battery (2) Deka 908DMF 12 V, 1450 CCA


QUIET-PAK® - Noise Reduction System

-Noise reducing acoustical foam in the engine enclosure
-Variable speed cooling fans for noise reduction


Carriage System
Maximum Thrust/Pullback 440,000 lbs. (200 Tonnes)
Carriage System Rack & Pinion, (2) Pinion Drive with Adjustable Force Limiter
Maximum Carriage Speed 95 ft. (29 m)/minute
Carriage Motors (2) Hydraulic 1017 cc, Variable Displacement
Carriage Gearbox (2) Planetary Drives


Rotary Drive
Rotary System (3) Pinion & Gear Drive with Infinitely Variable Torque
Maximum Rotary Torque 60,000 ft-lbs. (81,350 Nm) @ 0 – 25 RPM
Maximum Rotary Speed 95 RPM
Rotary Motors (3) 160cc Hydraulic Axial Piston/Variable Displacement
Rotary Brakes (2) Spring Applied/Hydraulic Release
Fluid Course 3.5 in.
Mud Flow Rate Permits up to 825 U.S. Gallons /minute
Maximum Mud Pressure 1,500 psi (103 bar)
Mud Swivel Rear Mounted, 5.5 in. (140 mm) IFLH Pin


Wrench Travel   Wrench has full-length thrust frame travel with hose carrier
Maximum Breakout Torque 154,000 ft-lbs. (209,500 Nm)
Maximum Makeup Torque 101,700 ft-lbs. (137,900 Nm)
Clamp/Grip Range 2 3/4 in. – 10 3/4 in. (70 – 273 mm) OD
Wrench Assembly Motor (2) Hydraulic LSHT, 18.3 CIR
Wrench Assembly Brake (1) Spring Applied/Hydraulic Release
Wrench Gearbox (2) SGL
Hydraulic Wrench Cylinder (6) 8 in. Bore x 3 in. Stroke (203 - 76.2 mm)


Drill Rig
Drill Angle 10° - 18°
Drill Pipe Range II – 34 ft. (10.4 m)


  • Es!Lok – Exit Side Lockout System with 1 mile (1.6 km) Range
  • Wiggle Steer®
  • Free standing operator's console with pressure gauges with 17" Touch Screen Display
  • Safety system package with ZapAlert
  • operator's manual and other unit support materials


Transport Dimensions
Length 50 ft. 9in. (15.47 m)
Width 8 ft. 2 in. (2.51 m)
Height 11 ft. 10 in. (3.61 m)


Transport Weights
Total Weight 98,060 lbs. (44,479 kg)
Total Weight w/o Wrench 90,260 lbs. (40,941 kg) – Wrench is Removable for Lighter Transport