WR750S

💧 WR750S 750 m Telescopic Mast Crawler Water Well Drilling Rig

The WR750S is a heavy-duty crawler fully hydraulic drilling rig designed for 750 m class deep water wells, mining water supply, and complex formation drilling tasks. It adopts a telescopic mast structure, supports direct operation with 6 m drill pipes and 6 m casing, and is equipped with 40 T lifting force, a 176 kW Weichai engine, and two high-torque rotary configurations. It is suitable for projects with higher requirements for drilling depth, drill string handling capacity, and continuous construction stability.

🎯 750 m Class Depth Is More Suitable for Deep Groundwater Development

Compared with 600 m class equipment, the WR750S further expands the scope of deep groundwater construction. With a maximum drilling depth of 750 m and a drilling diameter of 105–450 mm, it can be used for projects with large groundwater burial depth, unstable shallow aquifers, or the need for greater drilling depth margin. For areas that truly require deep water source development, this class can provide more sufficient construction space.

🪜 Telescopic Mast Balances Deep Hole Efficiency and Transport Convenience

The S in the model represents telescopic mast. In transport state, the mast can improve the overall transport profile and reduce the difficulty of cross-site relocation; in working state, it still supports direct operation with 6 m drill pipes and 6 m casing. For 750 m class deep holes, the number of pipe connections will be very large, and long drill pipes can significantly reduce auxiliary time, so the combination of telescopic mast and 6 m drill pipes has high practical value.

🔩 102 mm Drill Pipe Is More Suitable for High-Load Deep Hole Conditions

The data recommends 102 mm drill pipes and supports 6 m drill pipe length. At 750 m class hole depth, the drill pipe must not only bear greater self-weight but also face hole wall friction, rotary torque, and possible local sticking, so drill pipe strength, thread condition, and straightness are very important. A drill pipe inspection and rotation system should be established during construction.

💪 40 T Lifting Force Provides Greater Margin for Long Drill Strings and Casing Handling

The WR750S has a lifting force of 40 T and an axial pressure of 6 T. As hole depth increases, the weight of the entire string and friction will rise significantly. Greater lifting force helps with normal tripping, DTH hammer recovery, and partial casing handling. If abnormal pulling resistance occurs, it should first be handled by cleaning the hole, lifting slowly, and judging downhole conditions, rather than treating maximum lifting force as the only solution.

🔄 Two High-Torque Configurations Suit Different Project Loads

The rotary system can adopt 13000 / 6500 N·m or 15000 / 7500 N·m configurations, with a maximum rotary speed of 95 / 190 r/min. Larger torque reserve is more suitable for large-diameter, hard rock, and high-friction hole sections, while higher speed is suitable for drilling stages with relatively lower resistance. The final rotary configuration should be determined according to hole diameter, drilling tools, and main rock formations.

⚡ 176 kW Weichai Power Is Suitable for High-Load Continuous Construction

The WR750S is equipped with a 176 kW Weichai engine, providing power for rotation, feed, crawler travel, outriggers, and auxiliary hydraulic systems. For 750 m class deep hole projects with long construction cycles and a high proportion of hard rock, higher requirements are placed on power reserve and heat dissipation capacity, so air filters, radiators, fuel systems, and hydraulic oil temperature should be maintained with emphasis.

🚀 31 m/min Fast Lifting and 65 m/min Fast Advancing

The fast lifting speed is 31 m/min and the fast advancing speed is 65 m/min, mainly used for drill pipe handling, power head return, and auxiliary actions. In 750 m class projects, although a single non-drilling time is not long, it will significantly affect the construction period when accumulated, so fast actions combined with 6 m drill pipes can improve the effective working time of the entire machine.

🌾 Deep Agricultural Irrigation and Large Farm Water Wells

For farmland, orchards, and large agricultural projects with large groundwater burial depth, a 750 m class drilling rig can provide greater depth margin for water exploration. 6 m drill pipes reduce the number of pipe connections and are suitable for continuous construction of multiple deep wells. Actual well diameter and well depth should be designed in combination with aquifers, pump flow, and irrigation scale.

🏠 Deep Drinking Water Wells and Remote Community Water Supply

The WR750S can be used for water supply projects in rural areas, remote communities, schools, and infrastructure with deep groundwater levels. 750 m is not the target depth required by all projects, but the maximum reference capacity of the equipment. Before formal construction, a more reasonable target horizon should be determined based on regional hydrogeological data.

🏭 Industrial Water and Large Infrastructure Projects

Factories, industrial parks, large construction camps, and infrastructure projects may require long-term stable groundwater sources. The WR750S can be used for medium-deep production auxiliary water wells, equipment cleaning, and general industrial water supply wells. For long-term pumping projects, well completion structure, screen design, and pump type selection are as important as drilling itself.

⛏️ Mining Water Supply and Mine Camp Water Wells

Mining areas usually face problems such as hard rock formations, rough sites, scattered hole locations, and insufficient water sources. The crawler structure, 40 T lifting force, and 176 kW power of the WR750S are more suitable for deep water well construction in mining areas and can be used for mine domestic water supply, dust suppression, equipment cleaning, and auxiliary production water.

🌊 Mining and Engineering Dewatering Holes

The 750 m class depth also gives the equipment partial capacity for large dewatering holes. Mining and engineering dewatering projects must design well locations, well spacing, hole diameter, and pump volume based on hydrogeological data. The drilling rig is responsible for hole completion but cannot replace a complete dewatering plan.

💨 1.6–6 MPa Air Pressure Range Is Suitable for Deeper Hard Rock Drilling

The recommended working air pressure is 1.6–6 MPa, and air consumption is 16–75 m³/min, which can match medium and high-pressure DTH hammers. Under deep hole, large diameter, and high-altitude conditions, whether the air compressor displacement is sufficient is particularly important. If pressure meets the requirement but displacement is insufficient, insufficient impact and difficult cuttings removal may still occur.

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

After entering relatively intact hard rock, medium and high-pressure DTH hammers can be used for drilling. Hard rock construction should focus on DTH hammer lubrication, bit wear, and hole bottom cleaning. Once cuttings removal is poor in a 750 m class deep hole, settled cuttings and repeated crushing will significantly increase torque and energy consumption, so continuous hole cleaning is crucial.

🌦️ Weathered Rock and Alternating Soft and Hard Formations

Weathered rock is easy to drill, but hole wall stability is relatively poor; alternating soft and hard formations cause frequent changes in rotary load and feed resistance. During construction, rotation, feed, and hole cleaning frequency should be adjusted in time. When necessary, casing should be used for upper unstable hole sections to reduce hole wall risks in later deep hole stages.

🌧️ Soil, Clay, and Gravel Overburden Can Use Mud Drilling

The WR750S supports mud rotary drilling. For upper soil, clay, sand, and gravel layers, priority should be given to solving wall protection and cuttings carrying, and a mud pump and casing can be used to establish a stable hole section before entering rock formations and switching to DTH hammer drilling. For 750 m deep wells, stability of the upper hole section is particularly important.

🧱 Fracture Zones, Fissures, and Air-Leakage Formations

Fracture zones may cause block falling, hole shrinkage, air leakage, and sticking. After entering such hole sections, feed should be reduced, continuous hole cleaning should be maintained, and casing, foam, or other auxiliary methods should be used as appropriate. If air loss is obvious, it should be determined whether large fissures and cavities exist, rather than simply increasing air compressor pressure.

💧 Aquifers and Strong Water Inflow Sections

After entering the main aquifer, groundwater will change cuttings removal in the hole and the working state of the DTH hammer. The depth of the main water-producing layer should be recorded, and air supply, hole cleaning, and casing methods should be adjusted according to water inflow. During well completion, screens and sealing sections also need to be set according to aquifer distribution.

🚜 3 km/h Crawler Travel Is Suitable for Mining Areas and Field Platforms

The travel speed is about 3 km/h, and the maximum climbing angle is referenced at 21°. The crawler chassis is suitable for mining roads, gravel ground, and generally uneven sites. Since the overall weight is about 14 T, the bearing capacity of roads and platforms should be confirmed before relocation, and travel risks should be strictly controlled in soft soil, slopes, and wet slippery areas.

🦵 1.6 m Hydraulic Outriggers Ensure Stable Deep Hole Operation

The hydraulic outrigger stroke is 1.6 m, which can be used for equipment leveling and stabilization. 750 m class deep hole construction takes a long time, and the mast bears drill string and rotary loads for a long period, so equipment levelness and outrigger settlement control are very important. Sufficiently large pads should be used on soft ground.

🧵 2.5 T Auxiliary Winch Is Suitable for Heavier Drilling Tool Handling

The auxiliary winch has a lifting force of 2.5 T and can be used for handling DTH hammers, drill pipes, casing tools, and on-site accessories. Drilling tools in deep hole projects are heavier, and reasonable use of the winch can reduce manual handling, but rated load and lifting safety requirements must be observed.

📦 14 T Overall Machine Transport Requires Advance Planning

The overall weight is about 14 T, and the overall dimensions are about 6.64 × 2.25 × 2.67 m. During cross-project transport, the flatbed load capacity, road width and height limits, and equipment fixing points should be confirmed. The telescopic mast must be in a reliably locked state, and 6 m drill pipes and casing should be fixed separately.

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

Mud pumps, centrifugal pumps, generators, and foam pumps can be optionally configured for different formations and projects. Projects with more loose layers rely more on mud systems, deep hard rock holes rely more on large-displacement air compressors and DTH hammers, and formations with severe air leakage may require foam assistance. Reasonable configuration is more valuable than stacking all accessories.

⚠️ Precautions for 750 m Deep Hole Construction and Maintenance

Before daily work, check the engine, hydraulic system, telescopic mast, crawler, outriggers, winch, high-pressure air hose, and drill pipes; during deep hole construction, continuously record air pressure, torque, returned cuttings, returned water, and pulling resistance; when using 6 m drill pipes and casing, the mast must be fully extended and reliably locked, and the machine should be stopped for inspection in a timely manner if abnormal trends are found.

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

📊 Main Technical Parameters