Inwell Drilling Rigs

Model:  PDTH-100(INWELL RIG)


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Technical Specifications:

Make: PHEL
Model & Type PDTH-100, DTH drilling rig
Capacity : DTH Drilling
Drill hole Diameter 4 ½ inch (114.3 mm)
Drill Rod Diameter 3 inch (76 mm)
Drill Rod Length 5 feet (1.5 meter)
Max Depth 100 meters
Carrier Skid for the mounting of drill rig
Prime Mover The system shall be powered using diesel driven engine with the following capacity.
Engine make Ashok Leyland or Kirloskar or any other reputed make
Rated capacity 16 hp @ 1500 Rpm or equivalent
Mounting Structure Tripod base with 3-Mechanical Jacks.
Mast Assembly Sturdy structural channel mast structure electrically welded.
Mast overall length 2,500 mm
Rotary head travel 1,600 mm
Centralize opening 8 inch (204 mm)
Feed System Feed & Hoist actuation: Pulley, Wire rope & Hydraulic cylinder.
Feed cylinder Size & stroke Dia 80 mm x Dia 50 mm x 800 mm long.
Pull Up 3,500 Kg-f
Pull Down 2,100 Kg-f
Hoisting speed (up) 12.5 meter/ minute

Reeving Ratio


Having adequate travel to handle drill pipes and casing pipes up to 1.5 meter Long.

Feed system consists of hold back arrangement to control limit weight on bit, rapid and slow feed arrangement to suit variable ground condition.

Rotary Head Assembly (Top HeadDrive) Fabricated steel body
Torque 146 kg-m

Rotation Speed

Spindle rpm: 0-25 rpm

The RH unit travels on mast assembly to absorb sudden shock loads encountered during drilling Operation.



The entire equipment is designed to operate at high temperature encountered in the normal weather conditions.

Open loop circuit with variable displacement piston pumps and proportional valves for feed and rotation. Diverted valves for auxiliary drives.

Max operating pressure 140 kg/cm²
Hydraulic Tank capacity 200 liters.
Filtration (Nom) – Return line 10/25 microns

Cooling: Fin type oil to air.


Control Panel

All necessary control and monitoring valves and gauges are installed at control panel located nearer to drilling point for driller convenience


Stabilizer (3 No’s)
Model Mechanical Screw Jacks.
Water Injection Pump Hydraulically operated triplex water injection pump, for injecting water/foam with necessary piping and flow control valves
Max. Flow 36 liter/minute
Max. Pressure 40 kg/cm²
Air compressor Trolley Mounted type
Make ELGI/Atlas Capco or Equivalent reputed
Capacity 450 cfm @ 150 psi
Airline Lubricator Air-line lubricator will be used for DTH Hammer lubrication.
Make Spinc or any reputed make
Capacity 450 cfm @ 150 psi