WR350SE

💧 WR350SE 350 m High Cost-Performance Crawler Water Well Drilling Rig

WR350SE is a crawler water well drilling rig that balances 350 m drilling depth, 3 m / 6 m drill pipe configurations, and equipment investment cost. It is a combined model of the S series and E series: the S series focuses on compatibility with longer drill pipes and reducing the number of pipe connections, while the E series emphasizes high cost-performance and lower procurement investment. For users who need continuous construction but do not want to move directly to larger deep well equipment, this model is more suitable for medium-depth conventional water well projects.

🔩 3 m / 6 m Drill Pipe Configuration Is an Important Feature of This Model

WR350SE supports 3 m and 6 m drill pipes, with recommended drill pipe diameters of 89 / 102 mm. The 3 m drill pipe is more suitable for projects with ordinary transportation conditions and limited construction sites; the 6 m drill pipe can reduce the number of pipe connections and improve continuous drilling efficiency. For water well construction teams that need to complete longer footage within a day, reducing the time for connecting and disconnecting drill pipes can directly improve effective equipment utilization.

💰 High Cost-Performance Positioning Is More Suitable for Conventional Construction Teams

The E series does not simply reduce configurations, but focuses on the balance between commonly used functions, main construction capabilities, and procurement cost. WR350SE retains 350 m drilling depth, 16 T lifting force, dual-condition rotary system, and 91 kW power, while reducing dependence on unnecessary configurations. It is suitable for regional drilling teams, farmland water conservancy construction teams, and equipment dealers who are budget-sensitive but have stable project volumes.

🎯 350 m Drilling Depth Covers Broader Groundwater Development Needs

Compared with 300 m-class equipment, the 350 m maximum drilling depth provides more room for projects with deeper groundwater levels, unstable aquifer distribution, or the need for greater water exploration margin. The drilling diameter is 105–350 mm, and different well completion designs can be made according to well casing, submersible pump, and expected water output, making it suitable for agricultural, rural, and general engineering water wells.

🌾 Farmland Irrigation and Orchard Water Wells

Farmland, orchard, and greenhouse projects often require continuous construction of multiple water wells. WR350SE supports 6 m drill pipes, which can reduce pipe connection frequency and is especially suitable for contiguous farmland or large-scale planting areas. For irrigation wells, the final well diameter and depth should be determined based on aquifer burial depth, planned water output, and pump type, rather than simply constructing according to the equipment's maximum capacity.

🏠 Rural Domestic Water Supply and Village/Town Groundwater Development

In areas with insufficient centralized water supply or long water supply distances, WR350SE can be used for household water wells, village water supply wells, and small public water source wells. The 350 m-class drilling depth can cover more groundwater layers, but local hydrogeological data should still be referenced before formal construction to improve water exploration success rate and well completion quality.

🐄 Farm and Ranch Water Supply

Farms, ranches, and remote agricultural projects require long-term stable water sources. WR350SE can be used for livestock drinking water, site washing, and production auxiliary water wells. The crawler chassis facilitates transfer on farms, gravel roads, and general unpaved ground, providing greater mobility advantages for multi-hole projects.

💨 1.2–3.5 MPa Working Air Pressure Adapts to Medium and High Air Pressure DTH Hammers

When using DTH hammer drilling, the recommended working air pressure is 1.2–3.5 MPa, with air consumption of 16–55 m³/min, and it can be equipped with medium and high air pressure DTH hammers. The actual air compressor selection must be combined with hole diameter, drill pipe, DTH hammer specifications, rock hardness, and construction altitude. Insufficient air volume will cause poor cuttings removal, while excessive configuration will also increase equipment and fuel costs.

🔄 8500 / 4250 N·m Dual-Condition Torque Suitable for Different Hole Diameters

The rotary system has a maximum torque of 8500 / 4250 N·m, corresponding to maximum rotary speeds of 80 / 160 r/min. The lower speed, high torque condition is more suitable for larger hole diameters, higher resistance, or hard rock drilling; the higher speed condition is suitable for drilling stages with lower resistance. On site, adjustments should be made promptly according to cuttings return, torque changes, and bit condition.

💪 16 T Lifting Force Suitable for 350 m-Class Drill Pipe and Casing Handling

The 16 T lifting force can meet the requirements of tripping, DTH hammer recovery, and some casing operations in most 350 m-class water well projects. As hole depth increases, drill pipe weight and borehole wall friction will increase simultaneously. Therefore, when abnormal lifting resistance is encountered, hole cleaning, drill pipe inspection, and borehole wall condition assessment should be carried out first, rather than directly relying on maximum lifting force for forced pullback.

🚀 30 m/min Fast Lifting and 55 m/min Fast Advancing

Fast lifting and fast advancing are mainly used for non-drilling actions, such as drill pipe handling, power head return, and tool adjustment. They can significantly reduce auxiliary time, but they do not represent actual penetration rate in rock formations. The reference drilling efficiency given in the data is 10–35 m/h, and actual results are related to lithology, drilling tools, air compressor, and operator experience.

🪨 Corresponding Processes Can Be Used for Loose Formations and Rock Formations

The data clearly states that WR350SE is suitable for loose formations and rock formations. Upper soil layers, clay, sand layers, and gravel layers can use mud rotary, casing, or other hole stabilization methods; after entering weathered rock and intact rock formations, it can be converted to DTH hammer drilling. Switching processes according to formation is more conducive to hole stability than fixed use of a single method.

🌦️ Weathered Rock and Alternating Soft-Hard Formations

Weathered rock usually has faster penetration, but is prone to block falling and diameter shrinkage. When encountering alternating soft-hard formations, attention should be paid to changes in rotary torque, advancing resistance, and cuttings return. If necessary, reduce advancing or increase hole cleaning frequency. When the upper unstable hole section is thick, casing configuration should be considered in advance.

🧱 Fractures, Broken Zones, and Air Leakage Conditions

Fractured and broken formations may cause air leakage, block falling, sticking, and abnormal cuttings removal. At this time, rapid forced advancing should be avoided, and foam, casing, or other auxiliary measures should be used according to site conditions. The foam pump is an optional configuration and can be used for some pneumatic drilling and air leakage formation treatment.

💧 Aquifers and Strong Water Inrush Sections

After drilling into the main aquifer, groundwater will change bottom-hole cuttings removal and DTH hammer working conditions. The aquifer depth should be recorded promptly, and air supply and hole cleaning methods should be adjusted according to water inflow. During the well completion stage, filter pipes and sealing sections should also be reasonably arranged according to aquifer position to ensure later pumping effect.

⚡ 91 kW Power Balances Construction Capability and Cost

WR350SE is equipped with a 91 kW power system, providing power for hydraulic rotation, feed, crawler travel, and auxiliary actions. Compared with lower-power models, it has more sufficient power margin for large hole diameters, hard rock, and continuous construction, while still maintaining the cost control approach emphasized by the E series.

🚜 Crawler Chassis Suitable for Rural Areas, Construction Sites, and Gravel Ground

The travel speed is about 2.5 km/h, and the maximum climbing angle is referenced at 21°. The crawler structure is suitable for rural roads, construction sites, gravel ground, and generally uneven sites. Before equipment transfer, the working mechanism should be retracted, and slope and ground bearing capacity should be evaluated. On wet and slippery roads and soft soil areas, travel risks should be reduced.

🦵 1.5 m Hydraulic Outriggers Help Level the Equipment

The hydraulic outrigger stroke is 1.5 m, which can be used for equipment support and leveling. Before starting the hole, ensure that the surrounding support is stable. On soft ground, pads should be used to avoid settlement during construction, which could affect hole deviation, mast stability, and operational safety.

🧵 1.1 T Auxiliary Winch, 2.5 T Optional

The standard auxiliary winch lifting force is 1.1 T, with an optional 2.5 T configuration. For conventional drilling tool handling, the standard winch can meet daily auxiliary operations; if the project has many casing, DTH hammer, or on-site lifting needs, a larger winch capacity can be selected according to actual conditions.

📦 7.5 T Overall Machine Facilitates Transportation for Medium-Scale Construction Teams

The overall machine weight is about 7.5 T, and the overall dimensions are about 5.78 × 1.7 × 2.25 m. Compared with large deep well equipment, transportation and loading/unloading are easier to arrange, while it can still cover 350 m-class medium-depth projects. It is suitable for construction teams that need frequent transfers between different townships, farms, and construction sites.

🧰 Mud Pump, Centrifugal Pump, Generator, and Foam Pump Optional

Optional configurations include mud pump, centrifugal pump, generator, and foam pump. Different projects do not need all configurations. Projects with more loose layers pay more attention to the mud system, hard rock projects pay more attention to the air compressor and DTH hammer, and projects lacking stable power may need a generator. Selecting configurations according to working conditions can avoid unnecessary procurement costs.

⚠️ Daily Construction and Maintenance Precautions

Before starting work each day, check the hydraulic system, rotary head, crawler, outriggers, drill pipes, and high-pressure air pipes; during DTH drilling, check DTH hammer lubrication and air compressor status; during mud drilling, pay attention to whether circulation is smooth; after construction, promptly 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 operating methods, the final drilling efficiency, drilling depth, and well completion effect should be based on on-site working conditions.

📊 Main Technical Parameters