Drilling Performance and Air System
The PDTHR 250 is powered by a 169 HP engine operating at 2,400 rpm. Its ELGI air compressor provides 1,000 CFM at 275 PSI (19 Bar), supporting DTH drilling applications within the specified hole diameter range.
The feed system delivers 3,600 Kgf pull-up force and 4,400 Kgf pull-down force, with a hoisting speed of 30 metres per minute. This setup provides controlled movement of the drill string during operations.
Hydraulic, Mast and Hoist System
The hydraulic circuit operates at a maximum pressure of 220 kg/cm² and features a 600-litre hydraulic tank with 10/25 micron non-return-line filtration. The mast has an 18-ton capacity and stands 8.5 metres high.
The main hoist provides a 3,000 Kgf bare-drum line pull and a maximum line speed of 40 metres per minute. It uses a 16 mm wire rope with hydraulic drive. The auxiliary winch offers 1,000 Kgf bare-drum pull and a maximum speed of 30 metres per minute.
| PDTHR 250 Refurbished Specifications | Details |
|---|---|
| Prime Mover | Truck |
| Make | Ashok Leyland |
| Drive | 4 × 2 |
| Gross Vehicle Weight | 25 MT |
| Engine Rating | 169 HP @ 2400 rpm |
| Air Compressor | |
| Make | ELGI |
| Compressor Capacity | 1000 CFM |
| Compressor Pressure | 275 PSI (19 Bar) |
| Drill Depth | |
| Maximum Depth | 250 metres (650 feet) |
| Rod Handling | 4.5 metres (15 feet) |
| Hole Diameter | |
| DTH | 125–203 mm (6½–8 inches) |
| Rotary | 152–254 mm (6–10 inches) |
| Mast | |
| Mast Capacity | 18 tons (39,600 lbs) |
| Mast Height | 8.5 metres |
| Rotary Head | |
| Rotary Head Torque | 280 Kg-M |
| Rotation Speed | 1–100 RPM |
| Feed System | |
| Feed Pull-Up | 3,600 Kgf |
| Feed Pull-Down | 4,400 Kgf |
| Main Hoist Assembly | |
| Main Hoist Line Pull | 3,000 Kgf |
| Main Hoist Speed | 40 metres/minute |
| Auxiliary Winch | |
| Auxiliary Winch Pull | 1,000 Kgf |
| Auxiliary Winch Speed | 30 metres/minute |
| Hydraulic Circuit | |
| Hydraulic Tank | 600 litres |
| Maximum Hydraulic Pressure | 220 kg/cm² |
Frequently Asked Questions
What is the maximum drilling depth of the PDTHR 250?
The PDTHR 250 Refurbished can reach a maximum drilling depth of 250 metres, making it suitable for various water well and borehole projects.
Does the PDTHR 250 support DTH and rotary drilling?
Yes, the PDTHR 250 supports both DTH and rotary drilling, providing contractors with flexibility to select suitable drilling methods for different ground and borehole conditions.
What are the drilling diameter ranges of the PDTHR 250?
The rig supports 125–203 mm DTH drilling and 152–254 mm rotary drilling, covering several borehole sizes required for water well applications.
What truck platform is used for the PDTHR 250?
The PDTHR 250 is mounted on an Ashok Leyland 4×2 truck with a 25 MT gross vehicle weight and a 169 HP engine rated at 2,400 rpm.
What air compressor does the PDTHR 250 use?
The PDTHR 250 uses an ELGI air compressor with a capacity of 1,000 CFM at 275 PSI (19 Bar) for its drilling operations.
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