WR300SE

💧 WR300SE 300 m cost-effective crawler water well drilling rig

The WR300SE is a cost-effective crawler-mounted fully hydraulic drilling rig designed for conventional 300 m class water well projects. It does not simply pursue higher specifications, but is configured around common depth, common hole diameters, conventional formations and lower equipment investment. It has a maximum drilling depth of 300 m and a drilling diameter of 105–325 mm, making it suitable for farmland irrigation, rural water supply, livestock water use, groundwater investigation and general engineering water well construction.

💰 The SE series emphasizes equipment utilization and investment recovery

For small and medium-sized well drilling teams, whether equipment is easy to use often depends not only on maximum parameters, but also on whether it can cover daily projects, whether relocation is convenient, whether spare parts are easy to match and later operating costs. The WR300SE is positioned as a cost-effective series, with standard power of 73 kW and optional 85 kW, providing customers with different power configuration options while meeting conventional 300 m class projects.

🌾 Farmland irrigation is an important application for this 300 m model

Agricultural irrigation wells usually focus on the balance between completed well depth, water yield, hole diameter and construction cost. The WR300SE can be used for irrigation projects in farmland, orchards, greenhouses and nurseries. The 105–325 mm drilling diameter can be compatible with a variety of well casings and submersible pump configurations. The final hole diameter should be determined according to the designed water yield, casing size and formation stability.

🏠 Rural water supply and village and town water well construction

In areas with insufficient centralized water supply coverage, long water supply distances or relatively deep groundwater levels, 300 m class drilling rigs have greater water-finding margin than 200 m class equipment. The WR300SE can be used for household water wells, village water supply wells and small public water intake projects. Before completing the well, the target aquifer should be judged based on local hydrogeological data. It is not recommended to blindly deepen the well based only on the maximum drilling depth.

🐄 Water use for farms, ranches and agricultural production

Farms and ranches usually require stable water sources for drinking, cleaning and production. The WR300SE can be used for livestock drinking water wells, auxiliary wells on farms and remote agricultural projects. The crawler chassis is suitable for village roads, farms and general unpaved ground, and can perform short-distance relocation between multiple hole positions.

🧭 Groundwater investigation and general exploration holes

In addition to well completion projects, this equipment can also be used for groundwater investigation and general hydrogeological drilling. Through formation observation at different depths, changes in return water and aquifer records, it can assist in judging groundwater occurrence. If the project has higher requirements for sample integrity, special sampling or coring equipment matching the project objectives should be selected.

🪨 One machine handles both loose formations and rock

The data clearly states that the WR300SE can be used in loose formations and rock. Soil, clay, sand and gravel layers can use mud rotary and other methods to maintain borehole wall stability; after entering weathered rock or intact rock, down-the-hole hammer drilling can be switched according to lithology. Its multi-process adaptability makes it more suitable for water well projects with obvious formation changes.

💨 1.2–3.5 MPa working air pressure covers different DTH hammer requirements

During down-the-hole hammer drilling, the recommended working air pressure is 1.2–3.5 MPa and the air consumption is 16–55 m³/min, which can match medium and high-pressure series down-the-hole hammers. The actual air compressor selection cannot be based only on pressure; it must also consider hole diameter, drill pipe, DTH hammer specifications, rock hardness and altitude. Insufficient displacement usually directly affects impact efficiency and bottom-hole cuttings removal.

🔄 7000 / 3500 N·m dual-condition torque facilitates matching hole diameter

The maximum torque of the rotary system is 7000 / 3500 N·m, corresponding to maximum rotary speeds of 80 / 160 r/min. The lower speed and high torque state is more suitable for larger hole diameters and higher load conditions; the higher speed state can be used for drilling stages with lower resistance. The appropriate working range should be selected on site according to drilling tools and formation changes.

💪 15 T lifting force is suitable for conventional tripping at the 300 m class

The 15 T lifting force can be used for drill pipe tripping, DTH hammer recovery and some casing operations. As hole depth increases, both the self-weight of the drill pipe and borehole wall friction increase, so lifting resistance should be continuously observed during construction. If obvious abnormalities occur, priority should be given to checking diameter reduction, falling blocks, sticking or cuttings removal problems, rather than directly relying on maximum lifting force to handle them forcibly.

🚀 Fast lifting and propulsion reduce non-drilling time

The fast lifting speed is 30 m/min and the fast propulsion speed is 55 m/min, mainly used for drill pipe handling, power head return and auxiliary actions. The reference drilling efficiency in the data is 10–35 m/h. The actual penetration rate depends on formation, hole diameter, drilling tools, air compressor and operation method. The fast propulsion speed cannot be understood as the actual drilling speed.

🪜 3 m and 6 m drill pipe configurations suit different sites

The WR300SE supports 3 m and 6 m drill pipes, with recommended drill pipe diameters of 89 / 102 mm. The 3 m drill pipe is more flexible in transportation, site conditions and manual operation; the 6 m drill pipe can reduce the number of pipe connections and improve continuous drilling efficiency. The actual choice should be combined with transportation conditions, mast structure and construction site space.

🌦️ The focus of loose layer construction is hole stabilization rather than speed

Soil, clay, sand and gravel layers are prone to collapse, diameter reduction and drill burial. For such formations, priority should be given to mud circulation, casing and borehole wall protection, avoiding the simple pursuit of fast penetration. Mud pumps and centrifugal pumps can be optionally configured according to project needs for circulation, drainage and auxiliary well completion.

💎 Weathered rock and intact rock can use DTH hammers

After entering weathered rock, limestone, sandstone or other relatively intact rock, DTH hammers and air compressors can be configured according to hardness and hole diameter. Hard rock drilling should pay attention to DTH hammer lubrication, bit wear, air volume and cuttings removal status to prevent bottom-hole rock powder accumulation from reducing efficiency.

🧱 Broken rock formations and fracture zones require controlled propulsion

Fracture zones, fissures and local cavities may cause air leakage, falling blocks and sticking. When encountering such hole sections, propulsion should be reduced, hole cleaning strengthened and air pressure changes observed. If necessary, foam, casing or other auxiliary methods can be used. Foam pumps can be used as an optional system for some pneumatic drilling conditions.

💧 Aquifers and strong water inflow sections require timely process adjustment

When the borehole enters the main aquifer, the return water and cuttings removal status may change significantly. The aquifer depth should be recorded in time, and the air supply, mud or hole cleaning method should be adjusted according to water inflow. During well completion, the filter pipe position and sealing section should also be reasonably determined according to aquifer distribution.

🚜 7.2 T crawler chassis is suitable for general rural and engineering sites

The overall weight is about 7.2 T, the travel speed is 2.5 km/h and the maximum climbing angle is a reference value of 21°. The crawler chassis is suitable for rural roads, gravel ground, construction sites and general uneven ground. Before moving the equipment, the mast should be retracted and the ground bearing capacity confirmed. Extra caution is required on wet slopes and soft soil areas.

🦵 1.5 m hydraulic outriggers help level the rig

The hydraulic outrigger stroke is 1.5 m, which can be used for equipment support and site leveling. Before formal hole opening, ensure the outriggers are evenly stressed. Additional pads should be added on soft ground to avoid equipment settlement and tilting during drilling, which could affect hole position and safety.

⚡ 73 kW standard power and 85 kW optional power

The standard engine power is 73 kW, with 85 kW optional. For projects mainly involving conventional hole diameters and general formations, standard power helps control equipment cost; if the project is long-term under larger hole diameters, hard rock or high-altitude conditions, a higher power configuration can be evaluated. The final power choice should be based on actual load rather than simply choosing greater power.

🧰 Mud pump, centrifugal pump, generator and foam pump are optional

The data provides optional accessories such as mud pumps, centrifugal pumps, generators and foam pumps. Different customers do not need to uniformly configure all accessories. They should be combined according to the main drilling method, on-site power supply, drainage conditions and formation characteristics to avoid unnecessary procurement costs and transportation burdens.

⚠️ Daily construction and maintenance precautions

Before construction, check the hydraulic system, rotary head, crawler, outriggers, drill pipes and high-pressure air pipes; during pneumatic drilling, check the air compressor and DTH hammer lubrication; during mud drilling, pay attention to whether circulation is smooth; after each day, clean mud, dust and rock powder, and check drill pipe threads, hydraulic joints and wear parts.

Due to differences in actual geological conditions, downhole tools, drilling angle and operation methods, the final drilling efficiency, drilling depth and well completion effect should be based on on-site working conditions.

📊 Main technical parameters