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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: Used for large-scale mineral prospecting and detailed investigation to quickly obtain samples for analysis.
- Large-Diameter Engineering Pile Construction: Suitable for occasions requiring large-diameter deep foundation piles, such as bridges and high-rise buildings.
- Water Well and Geothermal Well Drilling: Efficiently completes the construction of deep water wells or geothermal exchange holes.
- Blast Hole Drilling: Drills large-diameter deep holes in mining operations for pre-split blasting.
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
