Reverse circulation drilling rig is a specialized drilling system designed to retrieve continuous, uncontaminated subsurface samples. Reverse circulation drilling is a percussion drilling technique that uses a dual-wall drill pipe to circulate compressed air and retrieve drill cuttings. Unlike conventional drilling methods, where cuttings rise through the annular space between the drill rod and borehole wall, RC drilling employs an inner tube to transport samples directly to the surface. This process ensures faster penetration rates, reduced sample contamination, and improved accuracy in identifying mineral deposits or geological formations. The technology was initially developed for mineral exploration but has since expanded into construction, geotechnical engineering, and environmental projects. Its ability to penetrate hard rock formations and deliver high-quality samples makes it indispensable in resource-intensive industries.
Reverse Circulation Drilling Rig Specifications
| Model | YG150RC | |
| Drill rig weight(crawler mounted) | kg | 9000 |
| Engine Power | kW | 125 |
| Length × Width × Height (normal) | mm | 6750x2200x2950 |
| Ambient Temperature Range | °C | -10～38 |
| Drill Ability | ||
| Nominal Drill Depth | m | 150 |
| End-hole Diameter | mm | 110-250 |
| Drill angle | ° | -10-90 |
| Horizontal hole height | m | 1.85-2.8 |
| Drill head output | ||
| Max Output Torque | N.m | 8000 |
| Output Rotation Speed(continuity) | rpm | 30 / 60, 54/108rpm |
| Output Rotation Speed(interval) | rpm | 62 / 124105/210rpm |
| Feeding | mm | 3500 |
| Thrust Force | kN | 45 |
| Lifting Capacity | kN | 65 |
| Pipe-puller Device Output | ||
| Output Rotation Speed | rpm | 40 |
| Max Output Torque | N.m | 30000 |
| Hole-through Diameter | mm | 370 |
| Auxiliary Winch | ||
| Pull Force of the First Layer | kN | 11 |
| Rope Diameter | mm | 14 |
| Rope Capacity | m | 60 |
| Engine(Cummins) | 6BTA5.9-C125 | |
| Power | kW | 125 |
| Rotary Speed (Max.) | rpm | 2200 |
| Track Chassis Base | ||
| Walk Speed | Km/h | 1.2 |
| Unit Pressure | MPa | ＜0.05 |
| Climb Ability | ° | ≥20 |
Advantages of Reverse Circulation Drilling Rigs
- Superior Sample Quality
The closed-loop system ensures samples remain uncontaminated by external debris or fluids. This is critical in mineral exploration, where even minor contamination can skew assay results. - High Penetration Rates
RC rigs excel in hard rock formations, achieving faster drilling speeds compared to conventional methods like diamond core drilling. This reduces project timelines and labor costs. - Cost Efficiency
By minimizing waste and maximizing sample accuracy, RC drilling reduces the need for repeated drilling. Additionally, lower fuel consumption and faster completion times contribute to overall cost savings. - Versatility
Reverse circulation drilling rigs adapt to diverse environments, including arid regions, wetlands, and rugged terrains. They are also compatible with various drilling mediums, such as air, foam, or water. - Environmental Safety
The controlled system prevents drilling fluids from leaking into the surrounding environment, making it ideal for ecologically sensitive areas.
Applications of Reverse Circulation Drilling
The versatility of reverse circulation drilling rig extends across multiple industries:
- Mineral Exploration
RC drilling is the gold standard for greenfield and brownfield exploration, enabling rapid evaluation of ore bodies in gold, copper, and base metal deposits. - Geothermal Energy
Drilling deep into hot rock formations requires rigs capable of withstanding extreme temperatures. RC rigs deliver reliable performance in geothermal well development. - Water Well Drilling
In regions with hard rock aquifers, RC rigs penetrate tough formations to access groundwater resources efficiently. - Construction and Engineering
RC drilling supports foundation design, soil testing, and slope stability analysis in civil engineering projects.
RC Drilling Machine Feature
Robust and durable construction for long service life.
Powerful and efficient power units for optimal drilling performance.
Advanced control systems for precise operation.
High-capacity cuttings handling systems for efficient removal of drilled material.
A focus on safety and operator comfort.
