Description
Main Parameters
| Dimensions (L×W×H) | 7.4 m / 2.3 m / 2.6 m | Machine Weight | 15 T |
| Rotary Head Max. Speed | 252 / 240 r/min | Rotary Head Max. Torque | 3,000 / 30,000 N·m |
| Thrust-Pull Back Force | 0 – 500 kN | Carriage Speed | 46 m/min |
| Engine Power | 194 kW / 2,200 rpm | Drill Rod Spec. | Ø89 × 3000 / Ø50 × 3000 mm |
Performance Characteristics
- The DDW-5030AT is designed for rock directional crossings in formations up to 130 MPa compressive strength, with a recommended crossing distance of approximately 500 meters and a reamed hole diameter not exceeding Ø900 mm.
- Within its operating range, pilot hole drilling efficiency is 3–5 times that of conventional mud-motor systems. Verified project results show 15–20 meters of pilot penetration per hour in 50 MPa rock hardness.
- When pilot drilling in rock, this rig requires no large volumes of mud to drive a mud motor. Water and bentonite consumption are only about one-tenth of traditional rock drilling methods, while the reduced mud volume also lowers disposal costs and environmental impact.
- Choosing a purpose-built rock HDD rig for complex formations can significantly improve construction efficiency and lower overall project costs.
- The power unit is equipped with a Cummins 194 kW electronically controlled turbocharged diesel engine for clean, efficient operation.
- The dual-drive rotary head uses industry-leading dual-wall drill string technology. Both inner and outer rods deliver high rotational speed, high torque, and strong impact resistance — ensuring excellent drilling capability and efficiency in hard rock conditions.
- The rotation circuit uses a closed-loop hydraulic system, while thrust/pull-back uses a load-sensing system with proportional pressure regulation.
- The outer drill rod is driven by imported Poclain low-speed high-torque motors. During pilot hole drilling, the outer rod controls penetration and steering; once the pilot hole is complete, the outer rod independently handles reaming and pipe pull-back. The inner rod drives a specialized wing-type bit for pilot hole drilling.
- Both inner and outer rod rotational speeds are infinitely variable, adapting the rig to different geological conditions.
- The specialized carving (guided rock drilling) feature effectively solves pilot drilling challenges in complex formations.
Technical Specifications
| Parameters | Description | Unit | Specification |
|---|---|---|---|
| Engine | |||
| Power | Rated power | kW | 194 |
| Rated Speed | Rated speed | rpm | 2,200 |
| Rotary Head Unit | |||
| Max. Torque | Spindle torque, max. | N·m | 3,000 / 30,000 |
| Max. Speed | Spindle speed, max. | rpm | 225 / 237 |
| Mast Type | |||
| Thrust-Pull Back Force | Thrust-Pull back force | kN | 0 – 300 |
| Carriage Speed | Carriage speed | m/min | 0 – 46 |
| Entry Drill Angle | Entry drill angle | ° | 15 – 24 |
| Track Chassis (Steel Crawler) | |||
| Transport Dimensions | L × W × H | m | 7.4 × 2.3 × 2.6 |
| Weight | Machine weight | T | 15 |
| Drill Rod Spec. | Drill rod (Dia. × Length) | mm | Ø89 × 3000 / Ø50 × 3000 |
| Mud Pump | |||
| Max. Flow | Max. flow | L/min | 600 |
| Max. Pressure | Max. pressure | MPa | 10 |
| Hydraulic System | |||
| Working Pressure | Working pressure | MPa | — |
| Hydraulic Capacity | Hydraulic oil tank capacity | L | — |
| Clamp | |||
| Max. Clamp Force | Max. clamp force | kN | — |
| Max. Break Torque | Max. break torque | N·m | — |
| Clamp Range | Clamp range, max. | mm | — |
| Wrench Separation | Distance between wrenches, max. | mm | — |
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