Description
Technical Parameters
Drilling Capacity
- Drilling depth (m): 500
- Drilling diameter (mm): 105–400
- Drill pipe diameter (mm): 76 / 89 / 102 / 114
- Drill pipe length (m): 1.5 / 2 / 3
Power Head Parameters
- Rotation torque (N·m): 10000–16000
- Rotation speed (rpm): 40–160
- Feed stroke (m): 3.3
- Lifting force (kN): 300
- Thrust force (kN): 150
- Fast lifting speed (m/min): 20
- Fast feeding speed (m/min): 40
Engine Parameters
- Engine brand: Cummins
- Rated power / speed (kW/rpm): 153 / 2200
Tool Winch
- Lifting force (kN): 20
Matching Air Compressor
- Working air pressure (MPa): 1.7–3.5
- Air consumption (m³/min): 17–42
Equipped DTH Hammer (Reverse Circulation)
- Medium & high air pressure series
Crawler Parameters
- Travel speed (km/h): 2–3
- Gradeability (°): 25
Overall Dimensions
- Transport dimension (mm): 6300 × 2100 × 2500
- Working dimension (mm): 4500 × 3000 × 6800
Overall Weight (t): 12
I. What is an RC Reverse Circulation Drilling Rig?
An RC (Reverse Circulation) drilling rig is a high-efficiency drilling rig specifically designed for geological exploration and sampling. Its core technology relies on a double-walled drill pipe and compressed air to achieve reverse circulation for slag removal, emphasizing rapid, continuous, and pollution-free sampling.
II. Core Working Principle (Simplified Explanation)
• Double-walled drill pipe: High-pressure air travels through the outer pipe, rock cuttings travel through the inner pipe.
• Air descends from the outer pipe to the bottom of the borehole, driving the down-the-hole hammer to break the rock.
• Rock cuttings are blown back to the surface by the airflow from the inner pipe and collected as samples by a separator.
• Entire process: external inlet, internal outlet; no mixing with borehole wall soil, resulting in clean samples.
III. Key Advantages
• Extremely high speed: 200–300 meters per day, 3–10 times faster than conventional drilling.
• Pure samples: Rock cuttings rise directly from the bottom of the borehole, with almost no borehole wall contamination, ensuring strong representativeness.
• Continuous sampling: No need to stop drilling; sampling can be done simultaneously, resulting in high efficiency and low cost.
• Environmentally friendly: Less or no drilling mud is used, suitable for water-scarce and environmentally sensitive areas.
IV. Main Applications
• Mineral exploration (gold, non-ferrous metals, iron ore, etc.)
• Geotechnical engineering investigation, hydrogeological survey
• Open-pit mine boundary delineation and rapid grade assessment
• Drilling in loose/fractured formations (sand, gravel, fractured zones)
V. Limitations
• Only rock cuttings can be obtained; complete core samples cannot be retrieved, and stratigraphic details cannot be examined.
• Hard rock, deep boreholes, and water-bearing complex formations require the use of other techniques.
