KLR DTHR-750 Drilling Rig: Key Specifications
April 7, 2026
KLR Universal, also known as KLR Industries, is widely recognised for delivering high-performance drilling solutions across the water well and infrastructure sectors. Their equipment is engineered to perform reliably in demanding field conditions where depth, rock hardness, and operational efficiency are critical.
The KLR DTHR-750 drilling rig is a powerful, versatile DTH drilling machine designed for deep water wells digging applications and complex construction projects. This blog explains its specifications in practical terms, highlights performance insights, compares it with other KLR DTH drilling rig models, and shows why this rig stands out in its class.
What Is a DTH Drilling Rig?
A DTH drilling rig uses a hammer located directly behind the drill bit at the bottom of the borehole. Compressed air powers the hammer, which repeatedly strikes the bit while rotation is applied from the surface. Air also flushes cuttings out of the hole, keeping the drilling face clear.
Compared to rotary drilling, DTH offers:
- Better performance in hard rock
- Straighter holes at greater depths
- More consistent penetration rates
Overview of KLR DTHR-750 Drilling Rig
The KLR DTHR-750 drilling rig is engineered for high-capacity drilling where depth, diameter flexibility, and rugged performance are essential. Its design supports varied terrains and site conditions, making it suitable for water well drilling and geotechnical projects.
Key highlights:
- Rated drilling depth up to 800 m (model range)
- Wide hole diameter coverage from 4.5″ to 24″
- Powerful pull-up and rotary torque for deep drilling
- Truck or skid mounting options for site flexibility
- Compatible with high-capacity air compressors and mud pumps
- Suitable for water well applications
Detailed Specifications Table
| Specification | Value |
| Hole Diameter – DTH (continuous) | 4.5″–8″ |
| Hole Diameter – DTH (overburden) | 9″–12″ |
| Rotary Range (continuous) | 8″–12¼″ |
| Rotary Range (overburden) | 14″–24″ |
| Rated Drilling Depth | 650–800 m (model range) |
| Carrier Mounting | Standard 8×4 truck / optional skid |
| Prime Mover | Deck engine (Cummins / custom options) |
| Pull-Up Force | 43,000 kgf |
| Pull-Down Force | 12,900 kgf |
| Rotary Head Speed | 0–120 rpm |
| Rotary Torque | Up to 1,050 kg·m |
| Air Compressor Capacity | 1,350 cfm @ 350 psi (compatible options) |
| Mud Pump | 10″ × 7½″ G&P |
These down-the-hole drilling rig specifications position the DTHR-750 as a high-capacity rig capable of deep, large-diameter drilling across challenging formations.
Performance Breakdown
- High pull-up force enables lifting long drill strings from deep boreholes safely.
- High torque with variable speed supports drilling through hard and mixed formations efficiently.
- Depth and diameter flexibility make the rig suitable for deep water wells and shallow blast holes.
In practical terms, this balance improves penetration rates while optimising air and fuel usage.
Components & Build Technology
Key parts of this DTH drilling equipment include:
- Mast and feed system – Supports deep drilling and stability
- Rod changer – Speeds up rod handling and reduces manual effort
- Air compressor setup – Powers the DTH hammer efficiently
- Mud pump unit – Supports drilling in overburden and soft formations
- Control panel and operator station – Enhances safety and precision
- Truck or skid mounting – Allows adaptability to site mobility needs
An annotated diagram would typically label these parts to show how they contribute to uptime and operational safety.
DTHR-750 vs Other KLR Universal Rigs
| Feature | DTHR-750 | DTHR-300 | DTHR-150 |
| Max Depth | 650–800 m | ~300–350 m | Lower range |
| Hole Dia Range | 4.5″–24″ | Narrower | Smaller |
| Mounting | Truck / Skid | Truck | Truck |
| Power | High | Moderate | Moderate |
| Best For | Deep water | Mid-depth water bore | Smaller jobs |
Contractors select rigs based on required depth, formation hardness, and project scale. The DTHR-750 is chosen where capacity and flexibility are critical.
Application Use Cases
Water Well Drilling : Ideal for deep borewells and high-yield wells due to its depth range and diameter flexibility.
Construction & Geotechnical Sites : Used for piling, dewatering wells, and deep investigation holes requiring accuracy.
Tips for Choosing the Right DTH Rig
Checklist for engineers:
- Required drilling depth
- Rock hardness and geology
- Target hole diameters
- Mobility needs (truck vs skid)
- Compressor compatibility
- Maintenance and spare parts access
- Operator safety and skill level
A decision tree would guide users: if depth exceeds mid-range and formations are hard, DTHR-750 becomes the logical choice.
At a glance, the rig offers depth, reliability, and multi-application capability for demanding projects.
Conclusion
The KLR DTHR-750 drilling rig from KLR Universal delivers exceptional depth, diameter flexibility, and performance for water well and site drilling applications. Its powerful pull forces, torque, and compressor compatibility make it a dependable choice across terrains.
Explore the full KLR DTHR-750 drilling rig specifications on KLR Universal’s website or contact their team for project-specific guidance.
