Hydracore 4000 Underground

P size drill head at 125 HP

Hydracore 4000 Underground

The Hydracore 4000 Underground drill is a bit more powerful than the Hydracore 2000 Underground. It has a P head that makes it possible to drill P size or advance a lot of H size casing. It is a very powerful underground machine that uses Hydracore’s simple design principles.

Specifications for 150 HP version

Maximum Capacity

B Size4,920 feet (1,500 m)
N Size3,770 ft (1,150 m)
H Size2,300 ft (700 m)
P Size1,310 ft (400 m)

Drill Head

Motor DisplacementRPMTorque
Maximum5221,700 ft-lbs
Minimum1,400392 ft-lbs

* Speed/Torque is continuously variable between maximum and minimum values. More torque (2,828 ft-lbs) is available in reverse for rod breaking, because the reverse pressure is set at 5,000 psi and the maximum pressure in forward is only 3,500 psi.

Hydraulic Chuck

OperationAcker Hydraulic, modified
Axial Thrust30,000 lbs
CapacityB to P
No. of Jaws5
Maximum Rod Size4 1/2"

Foot Clamp

OperationAccumulator closed, Hydraulic opened
Axial Thrust25,000 lbs
Maximum CapacityB to P
No. of Jaws2
Maximum Rod Size4 1/2"

Drill Slide and Feed Cylinder

Maximum Pull21,000 lbs
Maximum Thrust21,000 lbs
Stroke60 1/2"

Hydraulic Feed Frame Positioner

Allows drilling at any angle


Electric Motor125 or 150 HP
Main Pumps53 GPM at 3,500 psi
Auxiliary Pump
15 GPM at 2,500 psi
Auxiliary Pump
10 GPM at 2,500 psi
Pressure Pump3 GPM at 5,000 psi
Hydraulic Tank35 Gallons (US)
CoolingWater cooled heat exchanger


20 GPM 1,000 psi Water Pump Hydraulic
45 GPM 1,000 psi Water Pump Hydraulic
20 GPM at 1000 psi Bean 420 Hydraulic
35 GPM at 1000 psi Bean 435 Hydraulic
Wireline Hoist 2,000 foot Capacity
Wireline Hoist 5000 ft capacity with level winder
Hydraulic Mud Mixer


Drill Head (including chuck)850 lbs
Foot Clamp90 lbs
Drill Slide & Feed Cylinder650 lbs
Hydraulic Module1,450 lbs
Electric Module2,250 lbs
Hydraulic Feed Frame Positioner950 lbs
Drill on Hydraulic Positioner with Head, and Clamp3,500 lbs
Powerpack4,000 lbs