Exploration sampling reverse circulation rig
1. Continuous, Uncontaminated Sample Return
Dual-wall drill rods with an inner tube create a closed system. Cuttings travel directly to the surface without contact with borehole walls, delivering highly representative, uncontaminated samples – ideal for grade control and exploration.
2. Fast Penetration in Hard Rock
A pneumatic hammer drives a tungsten carbide bit at high frequency, fracturing hard rock rapidly. Much faster than diamond drilling, reducing rig time and cost per meter.
3. Real-Time Sample Collection
Cuttings are continuously returned to the surface, allowing on-site geologists to log and analyze samples immediately. No waiting for core recovery.
4. Efficient Sample Handling
At surface, a cyclone and sample splitter automatically collect samples into labeled bags by depth and interval. Bags go straight to the lab – no core cutting, splitting, or boxing.
5. Low Dilution & High Recovery
Reverse circulation ensures that fine and coarse cuttings are captured, minimizing sample loss and dilution. Excellent for ore body delineation.
Product Introduction
Reverse circulation (RC) drilling is a drilling method that uses dual-wall drill rods, consisting of an outer drill rod and an inner tube. These hollow inner tubes allow cuttings to flow continuously and steadily back to the surface. Unlike diamond drilling, RC drilling produces cuttings samples rather than core samples. The drilling principle involves a pneumatic hammer driving a tungsten carbide bit to break the rock. This repeatedly striking action is called the hammer—a pneumatic reciprocating piston that drives the tungsten carbide bit used to fragment hard rock. When compressed air is blown out, the pressure differential creates a reverse circulation, causing the cuttings to move upward into the inner tube. Once the cuttings reach the surface, they pass through a hose to a cyclone for sample splitting. The sample then drops through an opening at the bottom into sample bags. These sample bags are labeled with the collection location and depth, and can be directly transported to a laboratory for analysis.
Product parameters
| Item | Parameter | Unit | Specification |
| Drilling capacity | Max drilling depth | m | 300 |
| Drilling diameter | mm | Φ325 | |
| Engine | Engine brand | / | Yunnei / Cummins |
| Rated power | Kw | 85 / 75 | |
| Propulsion system | Lifting force | T | 12 |
| Speed of fast lifting | m/min | 30 | |
| Feeding force | T | 6 | |
| Speed of fast putting down | m/min | 60 | |
| Max feeding stroke | mm | 3600 | |
| Rotation system | Rotary torque | Nm | 6500 / 3250 |
| Rotary speed | r/min | 70 / 140 | |
| Travelling system | Travel speed | Km/h | 2.5 |
| Grade ability | ° | 21 | |
| Tool winch | Lifting force | T | 1.5 |
| Drilling rods diameter | / | mm | 89 / 102 |
| Transport dimension | Length × Width × Height | mm | 5760×1850×2450 |
| Machine weight | / | T | 7 |
| Optional accessories | — | — | Welding generator, Foam Pump |
Product details
1. Integrated Control System: Precision at Your Fingertips
Centralized Instrument Panel: The control console is equipped with multiple pressure gauges and condition indicators, allowing operators to monitor critical parameters such as drilling pressure, flow rate, and rotation speed in real time. This eliminates the need for scattered checks and ensures precise control over downhole conditions, meeting the high demands of exploration sampling.
Tiered Control Levers: Multiple hydraulic control levers are neatly arranged at the bottom, corresponding to functions like mast lifting/lowering, rotation, and outrigger adjustment. The intuitive layout minimizes operational errors. A dedicated red emergency control valve enables quick shutdown of key power circuits, significantly enhancing on-site safety.
Safety & Status Indicators: The panel features prominent WARNING labels, a key switch, and status indicator lights. This allows for controlled equipment start-up and rapid fault identification, fully complying with exploration site safety management standards.
2. High-Precision Sampling System: Ensuring Sample Integrity
Efficient Sample Collector: The independent cone-shaped sample collector, supported by a sturdy frame, enables quick collection and transfer of cuttings/core samples. It minimizes secondary contamination during sampling and is perfectly suited for air reverse circulation continuous sampling, delivering continuous formation data without frequent tripping.
Specialized Rotary Head: The rotary head features a large-diameter flange and multiple hydraulic lines, providing stable torque output to meet the drilling requirements of different formations. Its standardized interface allows for quick bit changes, ensuring high sample recovery rates across various rock types.
Heavy-Duty Reverse Circulation Lines: Equipped with thick, wear-resistant high-pressure hoses with spiral protection, the system withstands high-pressure air/water flow shocks. This ensures stable delivery of the reverse circulation medium, preventing leaks that could interrupt the cycle and supporting continuous sampling in complex formations.
3. Stable Chassis & Power System: Built for Rugged Exploration Sites
Heavy-Duty Crawler Undercarriage: The steel crawler with rubber shock-absorbing pads boasts low ground pressure, enabling smooth movement across mountainous and hilly terrain. Modular track guards simplify maintenance. Combined with hydraulic outriggers, the rig can be quickly leveled during operation, drastically reducing vibration and improving sampling accuracy.
Modular Hydraulic Power Pack: Key hydraulic components feature impact-resistant designs with red identification. Standard quick-connect fittings on the lines facilitate fast on-site repairs and replacements. The hydraulic system’s multi-stage pressure regulation allows operators to adjust drilling pressure based on formation conditions, balancing efficiency and equipment stability.
Site Lighting & Protection: The operator station includes an explosion-proof LED work light for night or low-light auxiliary operations. Critical components are coated with anti-corrosion paint, extending service life in humid, dusty exploration environments and reducing maintenance costs.
4. Overall Design Advantages: Efficiency Meets Practicality
Modular Construction: Independent modular design across all systems simplifies disassembly, transport, and on-site assembly, ideal for remote exploration projects.
Low-Impact Operation: The reverse circulation process eliminates the need for large volumes of drilling mud, reducing environmental impact. Samples are delivered directly through the center of the drill string, avoiding contact with the external environment and ensuring accurate geological data.
Comprehensive Safety Features: Guardrails, anti-drop devices, and warning labels protect key areas. All hoses and electrical lines are wrapped in protective sleeves, enhancing safety in harsh working conditions.
Structural composition
Rack, drilling tower, drill rod, impactor, circulation system, etc
Company strength
Puhua Energy Equipment Technology (Shandong) Co., Ltd. is located in the Ninth Industrial Park of Jining High-tech Zone, Shandong Province – a renowned hub for construction machinery manufacturing in China. As a core city of the Lunan Economic Circle, Jining is home to one of the largest construction machinery industrial clusters in the country. Benefiting from well-established industrial infrastructure, a mature supply chain system, and convenient port logistics, the city provides an exceptional industrial foundation for equipment manufacturing.
The company is a national high-tech enterprise specializing in the design and manufacturing of geological engineering equipment. Our main products include fully hydraulic crawler drill rigs and underground drill rigs, which are widely used in energy development, infrastructure construction, and mineral resource exploration. Our business covers more than 30 provinces and cities across China, and our products are exported to international markets including Southeast Asia, Africa, Russia, and South America.
Leveraging the mature industrial base of Jining, we possess full-process manufacturing capabilities ranging from rough machining to CNC precision finishing and precision assembly, supported by a robust quality control system and efficient delivery capacity. We offer comprehensive lifecycle services, including pre-sales consulting, equipment selection, technical training, after-sales maintenance, spare parts supply, and equipment rental, to meet the diverse needs of our customers. With strong technological R&D, stable manufacturing and delivery, and reliable after-sales service, we are committed to providing global customers with efficient and reliable reverse circulation drill rigs and energy equipment solutions.
Frequently Asked Questions (FAQ)
1. What application scenarios is this drill rig suitable for?
It is suitable for domestic/industrial water well drilling, geological exploration coring, small-scale pile foundation construction, hydrogeological surveys, and similar scenarios. It adapts to various formations including clay, sand, rock, and more.
2. What are the advantages of reverse circulation drilling compared to conventional drilling?
The reverse circulation process efficiently removes cuttings through the circulating medium, resulting in faster drilling speeds and higher borehole quality. It is particularly suitable for deep-hole operations and effectively reduces the risk of borehole collapse.
3. How capable is the crawler chassis in terms of maneuverability?
The steel crawler chassis has low ground pressure and can handle complex terrains such as muddy grounds, mountain roads, and gravel surfaces. Equipped with hydraulic outriggers, it provides enhanced operational stability.
4. Is the equipment difficult to maintain?
Key components feature a modular, quick-disassembly design with clearly arranged piping, making later inspection, repair, and part replacement convenient. This reduces maintenance costs and downtime.
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