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Facing challenges with low efficiency in deep hole drilling and inaccurate sampling? The reverse circulation drilling rig utilizes its unique dual-pipe design to achieve efficient slag removal and contamination-free sampling, making it the key to overcoming these bottlenecks.【WhatsApp/WeChat/Phone】+86 13837122632
YG Reverse Circulation Drilling Rig Parameters
YG-RC400 Model:
| Item | Parameter | Item | Parameter |
| Max Drilling Depth | 400 m | Drilling Diameter Range | 115-305 mm |
| Working Air Pressure | 1.05-3 MPa | Air Consumption | 16-42 m³/min |
| Max Rotary Torque | 4000-5700 Nm | Axial Pressure | 5 T |
| Drilling Efficiency | 10-25 m/h | Machine Weight | 7 T |
| Adaptable Conditions | Loose Layers & Bedrock | Drilling Method | Top-Drive Hydraulic Rotation/Down-The-Hole Hammer |
How Does the Reverse Circulation Drilling Rig Work?
- Dual-Channel Drill Pipe: The tool consists of an outer pipe and an inner pipe. Compressed air is delivered at high speed to the bottom of the hole through the annular gap between them.
- Reverse Slag Removal: At the hole bottom, the airflow carries the cuttings (samples) crushed by the DTH hammer back to the surface at high speed through the inner pipe’s central channel, creating the “reverse circulation.”
- Sample Collection: The cuttings are directly collected into sample bags via a cyclone separator on the surface, enabling continuous, contamination-free sampling by depth. This is precisely why the rc drilling machine is highly favored in exploration.
What Are the Benefits of Using a Reverse Circulation Drilling Rig?
- Extremely High Drilling Efficiency: Combining impact crushing with continuous reverse circulation slag removal, daily advance rates can reach 200-300 meters, far surpassing many traditional methods and significantly shortening project timelines.
- Reliable Sample Quality: Cuttings travel directly to the collector via the sealed inner pipe, avoiding cross-contamination with the borehole wall, providing high-fidelity samples for geological analysis or mineral assessment.
- Lower Overall Cost: Especially compared to diamond core drilling, its drilling cost can be reduced by up to 40%, and it has minimal reliance on water, making it particularly suitable for operation in arid and water-scarce regions.
- Strong Adaptability: Capable of handling various formations from loose overburden to hard bedrock, with a wide drilling diameter range to meet diverse engineering needs.
The Difference Between Forward Circulation and the RC Drilling Machine
- Opposite Circulation Paths: In a forward circulation drill, the drilling fluid (or air) is sent down through the center of the drill pipe, carrying cuttings back up through the annular space between the drill pipe and the hole wall. In contrast, the reverse drilling machine has the opposite path: the airflow is sent down the annulus, and samples return via the central pipe.
- Slag Removal Efficiency & Sample Quality: Forward circulation is prone to poor slag removal and hole wall collapse in deep holes or complex formations. Reverse circulation, due to the smooth central pipe channel and high flow velocity, ensures thorough slag removal and provides superior sample representation.
- Primary Application Focus: Forward circulation is more common in pile foundation construction where sample quality requirements are not high. For exploration and special projects requiring high-quality continuous sampling or efficient deep hole drilling, the reverse circulation process is the preferred choice.
What Projects is the Reverse Drilling Machine Mainly Used For?
Mineral and Geological Exploration
Ideal for large-scale mineral prospecting and detailed geological surveys. The YG reverse drilling machine adopts double-wall drill pipe continuous sampling technology. Cuttings flow upward steadily through the inner pipe and are collected by a cyclone separator, delivering contamination-free and highly representative samples. Its maximum drilling depth reaches 400 meters (customizable up to 1200 meters) with a penetration rate of 10-25 meters per hour, enabling fast sample collection for testing. Equipped with a dust collector, it controls dust effectively for eco-friendly operation.
Large-Diameter Engineering Pile Foundation Construction
Suitable for projects requiring large-diameter deep foundation piles, such as bridges, high-rise buildings, and ports. This YG drill rig supports a drilling diameter of 115-305 mm and features a hydraulic top drive rotation and feed system. The exclusive compensating slide protects drill pipe threads to extend service life. The matched hydraulic wrench ensures safe and quick pipe connection and disconnection, greatly reducing labor intensity.
Water Well and Geothermal Well Drilling
It efficiently drills deep water wells and geothermal heat exchange holes in various formations, including loose layers and bedrock. Fitted with a patented air pre-filter, the rig removes over 90% of dust from intake air to keep the engine running reliably in harsh conditions. The dedicated centralizer paired with a level guarantees high drilling accuracy.
Mining Blast Hole Drilling
Used for drilling large-diameter deep holes for pre-split blasting in open-pit mines. The YG drill rig features a maximum rotary torque of 4000-5700 Nm and a top rotary speed of 150 rpm, handling hard rock with ease. Its hydraulic crawler chassis runs at 2.5 km/h with a gradeability of 21°, ensuring flexible relocation.
Geological Disaster Control and Tunnel Advanced Drilling
Widely applied in landslide treatment, dam foundation reinforcement and tunnel advanced geological prediction. The mast lifting and compensating cylinders keep the frame firmly grounded for excellent overall stability. The wear-resistant roller slide has a long service life, perfect for continuous heavy-duty work.
If you want to know more about application scenarios or customize a greater drilling depth, feel free to contact YG for tailored solutions.
Precautions for Using a Reverse Circulation Drilling Rig
- Strict Use of Personal Protective Equipment (PPE): Due to the extreme noise levels, high-grade hearing protection must be worn. Operators also require hard hats, safety glasses, dust masks, safety shoes, and gloves.
- Standardized Maintenance and Inspection: Pay close attention to the air compressor system, the sealing of the dual-wall drill pipes, and high-pressure hose connections to prevent gas leaks and potential safety incidents.
- Proper Crew Configuration and Training: A standard RC drilling crew requires at least one operator and two sample handlers. All personnel must receive professional training, be familiar with equipment operating procedures and emergency response protocols to strictly prevent handling or mechanical injuries.
If you are seeking a reliable and efficient solution for a demanding drilling project, a high-performance reverse circulation drilling rig for sale might be exactly what you need. YG drilling rigs integrate high-strength structures, stable hydraulic systems, and efficient air compression systems, committed to providing customers with a highly productive drilling experience. Contact us for more detailed technical information and customized solutions.【WhatsApp/WeChat/Phone】+86 13837122632
