RC500E

💧 RC500E 500-Meter Cost-Effective Air-Lift Reverse Circulation Water Well Drill Rig

The RC500E is a 500-meter class crawler-mounted air-lift reverse circulation drill rig designed primarily for deep water well construction. Unlike the RC models intended for mineral sampling, this product focuses on deep-hole cuttings removal, hard rock water wells, mining water supply, and hole completion in complex formations. At the same time, the E series positioning emphasizes cost-effectiveness: while retaining 500-meter class drilling capability, 300 kN lifting force, and relatively high rotary torque, it controls equipment procurement and configuration complexity.

💰 The Core of the E Series Is Concentrating Budget on Capabilities That Truly Affect Construction

For deep water well projects, the key is not having as many additional functions as possible, but whether drilling depth, lifting force, rotation, air compressor matching, and downhole cleaning capability are sufficient. The RC500E retains 132 kW power, 8000–12000 N·m rotary torque, 300 kN lifting force, and multiple drill pipe configurations. It is better suited for construction teams that want to enter the 500-meter water well market while controlling initial equipment investment.

🔄 Air-Lift Reverse Circulation Emphasizes Deep-Hole Cuttings Removal and Bottom-Hole Cleaning

Air-lift reverse circulation uses compressed air to create return flow in the inner pipe, carrying rock cuttings and drilling debris from the hole bottom back to the surface through the inside of the drill pipe. For deep hard rock water wells, this cuttings removal path can reduce the long-distance upward return of cuttings in the annulus, helping maintain a clean hole bottom and reducing regrinding and sediment problems. Actual results still depend on air compressor displacement, hole diameter, drill pipe sealing, and formation conditions.

📏 500-Meter Drilling Depth Is Suitable for Medium-to-Deep Groundwater Development

With a maximum drilling depth of 500 m and a drilling diameter of 140–400 mm, it can cover various needs such as rural deep wells, high-flow agricultural water wells, industrial water wells, and mining water supply. For areas with deep groundwater levels or unstable shallow aquifers, 500-meter class equipment provides greater depth margin for water exploration, but the final well depth should still be determined by hydrogeological data and the actual water-producing layer.

🌾 Farmland Irrigation and High-Flow Agricultural Wells

The RC500E can be used for irrigation water wells in large farmland, orchards, greenhouses, and livestock farms. The 140–400 mm hole diameter range allows different well diameters to be designed according to well casing size, submersible pump, and expected water yield. For agricultural projects requiring larger pumping volumes, in addition to drilling depth, attention should also be paid to well casing, screen pipe, and aquifer section design.

⛏️ Mining Water Supply Is an Important Application for This Model

Mining projects usually require domestic water, dust suppression, equipment washing, and auxiliary production water sources. Mining formations often have a high proportion of hard rock and average road conditions. The RC500E's crawler chassis and pneumatic reverse circulation process are better suited to this environment. For open-pit mines, exploration camps, and remote mines far from water supply networks, the 500-meter class drilling depth also provides greater space for groundwater development.

🌊 Can Be Used for Mining Dewatering and Engineering Dewatering Holes

For open-pit mine slopes, underground mine peripheries, and deep foundation pit projects, some projects require dewatering wells arranged through drilling. The RC500E can undertake the corresponding drilling construction, but the hole positions, well diameters, screen pipes, pump capacities, and spacing of dewatering wells must be determined based on hydrogeological calculations. The equipment is only a drilling platform and cannot replace a complete dewatering design.

💎 Hard Rock Conditions Such as Granite, Basalt, and Limestone

The equipment is suitable for DTH down-the-hole drilling in relatively intact rock formations such as granite, basalt, limestone, and sandstone. During hard rock construction, DTH hammer impact, rotation speed, feed force, and air volume need to be coordinated and matched. If bottom-hole cuttings removal is poor, continuing to increase feed may instead aggravate drill bit wear and sticking risk.

🧱 Faults, Fracture Zones, and Fissured Formations

Fracture zones are prone to block falling, hole shrinkage, air leakage, and sticking. After entering such hole sections, feed speed should be reduced, continuous hole cleaning should be maintained, and casing or foam assistance should be used according to hole wall stability. If pulling resistance continues to increase, the situation of falling blocks and sediment in the hole should first be assessed before deciding on the treatment method.

🌦️ Weathered Rock and Loose Overburden

The difficulty of weathered rock and upper loose overburden is not that it cannot be drilled, but that the hole wall is unstable. In soil layers, sand layers, gravel, and strongly weathered sections, casing, mud, or other hole stabilization methods can first be used to establish a stable hole section, then pneumatic reverse circulation drilling can proceed into relatively intact rock, thereby reducing hole wall problems in the later stages of deep holes.

💧 Aquifers and Strong Water Inflow Sections

When the borehole enters the main aquifer, groundwater will change the cuttings return and DTH hammer working state in the hole. The depth of the main water-producing layers should be recorded, and air supply, hole cleaning, and casing methods should be adjusted according to water inflow. During well completion, screen pipes and water-stop sections also need to be reasonably arranged according to aquifer positions to ensure long-term pumping performance.

🌬️ Air-Leakage Formations Need to Be Handled from Both Displacement and Process Aspects

Open fractures, karst caves, and high-permeability formations may cause severe air leakage. If only pressure is increased while displacement is insufficient, effective airflow may still not reach the hole bottom. In such cases, air compressor displacement can be increased according to severity, foam can be used, casing can be installed, or the drilling method can be adjusted to avoid large air losses causing DTH hammer failure.

💪 300 kN Lifting Force Provides Margin for 500-Meter Class Drill String Handling

The equipment has a lifting force of 300 kN and a feed force of 150 kN. In 500-meter class boreholes, the self-weight of drill pipes, hole wall friction, and casing weight all increase significantly, so greater pull-up capacity is beneficial for normal tripping and tool recovery. If abnormal resistance occurs, hole cleaning should be prioritized and downhole conditions assessed, avoiding direct use of maximum lifting force to pull forcefully.

🔄 8000–12000 N·m Rotary Torque Adapts to Different Loads

Rotary torque is 8000–12000 N·m, and rotation speed is 40–160 r/min. Large-diameter, hard rock, and high-friction conditions require low speed and high torque; stable hole sections with less resistance can use higher rotation speeds. Actual drilling should be adjusted in real time according to torque changes, cuttings return volume, and drilling tool conditions.

🪜 3.3 / 6.6 m Feed Stroke Can Be Selected According to Construction Efficiency

The feed stroke can be configured as 3.3 m or 6.6 m, and supports 1.5 / 2 / 3 / 6 m drill pipes. The 6.6 m long stroke is suitable for projects that want to reduce pipe connection frequency and improve continuous drilling efficiency; the 3.3 m configuration is more conducive to controlling overall working height and site adaptability. The final choice should combine transportation, hole position space, and main drill pipe length.

💨 1.7–3.5 MPa Working Air Pressure and 17–42 m³/min Air Consumption

The air compressor is a key matching component of the air-lift reverse circulation system. Recommended working air pressure is 1.7–3.5 MPa, and air consumption is 17–42 m³/min. As hole depth increases, hole diameter becomes larger, rock becomes harder, or construction altitude rises, the required displacement will increase. Actual selection must consider both DTH hammer and reverse circulation cuttings return requirements.

⚡ 132 kW Diesel Power Is Suitable for Independent Field Construction

The equipment uses 132 kW diesel power with a rated speed of 2400 r/min. Mining areas, rural areas, and remote sites often lack stable power supply, and diesel power can provide better independent operation capability. During long-term high-load operation, engine cooling, air filtration, and fuel system maintenance should be strengthened.

🚜 Crawler Chassis Is Suitable for Mining Areas, Rural Roads, and Gravel Ground

Travel speed is about 2.5 km/h, and reference gradeability is 30°. The crawler structure is more suitable for gravel roads in mining areas, rural roads, and generally uneven ground. Since the overall weight is about 12 T, ground bearing capacity and slope conditions must be confirmed before relocation, and movement should be cautious in soft soil and wet slippery areas.

🧵 20 kN Auxiliary Winch Reduces the Burden of Drill Tool Handling

The auxiliary winch has a lifting force of 20 kN and can be used for handling DTH hammers, drill pipes, casing tools, and some on-site accessories. Reasonable use of the auxiliary winch can reduce manual labor intensity, but rated loads should be controlled during lifting, and personnel should be kept away from suspended objects and wire rope stress areas.

📦 Transportation and Working Dimensions Need to Be Planned in Advance

Transportation dimensions are about 6300 × 2100 × 2500 mm, working dimensions are about 4000 × 2900 × 6800 mm, and overall weight is about 12 T. Before transportation, vehicle load capacity, loading fixation points, and road height limits should be confirmed; after arriving at the site, sufficient space for mast raising and a safe working range should also be reserved.

🧰 Optional RC Hammers, Drill Bits, Casing, and Foam Systems According to Project Needs

The complete construction system can be configured according to the project with reverse circulation DTH hammers, drill bits, drill pipes of different specifications, casing tools, air compressors, high-pressure air hoses, oil mist lubricators, foam pumps, and generators. Not all configurations are needed for different formations. Reasonable optional configuration can continue to reflect the cost advantage of the E series while ensuring construction capability.

⚠️ Precautions for High-Pressure Pneumatic and Deep-Hole Construction

Before starting work each day, inspect high-pressure air hoses, joints, safety ropes, rotary head, crawler, mast, and hydraulic system; during drilling, continuously observe air pressure, cuttings return, water return, and torque changes; after construction is completed, promptly clean drilling tools and the reverse circulation channel, and check DTH hammer lubrication, drill pipe sealing, and high-pressure pipeline wear.

Due to differences in actual geological conditions, downhole tools, drilling angles, and operating methods, the final drilling efficiency, drilling depth, and well completion results should be based on on-site conditions.

📊 Main Technical Parameters