WR1200SL

💧 WR1200SL 1200 m Diesel-Electric Dual-Power Telescopic Mast Crawler Water Well Drilling Rig

The WR1200SL is a heavy-duty crawler-mounted fully hydraulic drilling rig designed for large deep-hole projects such as 1200 m-class ultra-deep water wells, mining area water supply, industrial water supply, and geothermal surveys. The equipment adopts a diesel / electric dual-power configuration and a telescopic mast structure, supports 9.6 m drill pipes, has a maximum drilling depth of 1200 m and a hole diameter of 105–900 mm, and is equipped with 60 T lifting force, 30000 / 15000 N·m rotary torque, and 264 kW Cummins diesel power. It is suitable for projects with long construction cycles, large hole diameters, high depths, and significantly different on-site energy conditions.

⚡ Diesel-electric dual power is one of the most important operational advantages of the WR1200SL

Remote mining areas, deserts, and field projects usually rely more on diesel power, while fixed mine drilling sites, industrial parks, or long-term construction projects may have a stable power grid. The WR1200SL can be configured between diesel and electric solutions according to site conditions, retaining independent field construction capability while also providing an option for fixed sites to reduce fuel consumption and exhaust emissions. The final power, voltage, frequency, and starting scheme of the electric part should be determined according to the project power supply system.

🌐 The 1200 m class has entered the scope of large ultra-deep water well construction

With a maximum drilling depth of 1200 m and a hole diameter of 105–900 mm, the WR1200SL can cover deep groundwater projects that ordinary water well equipment cannot handle. For deep aquifers, deep mine wells, high-flow industrial water supply, and certain geothermal surveys, 1200 m-class equipment has greater depth reserve. Actual drilling depth still needs to be determined according to hole diameter, formation, drill pipe, air compressor, and hydrogeological conditions.

🪜 The telescopic mast helps heavy equipment improve transport dimensions

1200 m-class equipment is inherently large in size and weight, so transport organization is more complex than for small and medium-sized drilling rigs. The telescopic mast can shorten the transport profile during relocation and then extend to working height after reaching the hole position, improving loading, road passage, and internal site relocation conditions while ensuring long drill pipe operation capability.

🔩 9.6 m drill pipes significantly reduce the number of connections in ultra-deep holes

The WR1200SL supports 9.6 m drill pipes, with recommended drill pipe diameters of 114 / 127 mm. For deep holes above 1000 m, if short drill pipes are still used frequently, the number of connections and disconnections will be very high, and auxiliary time and labor intensity will increase significantly. 9.6 m long drill pipes can significantly reduce connection frequency and are more suitable for continuous construction of ultra-deep holes and long-cycle projects.

💪 60 T lifting force provides greater margin for ultra-deep drill string and casing handling

The equipment has a lifting force of 60 T and an axial pressure of 10 T. At 1200 m-class hole depths, the self-weight of the drill string, borehole wall friction, casing weight, and downhole anomalies will significantly increase pulling loads. Greater lifting capacity facilitates normal tripping, DTH hammer recovery, and large-diameter casing operations, but in case of sticking or hole shrinkage, the hole should still be cleaned first and downhole conditions assessed.

🔄 30000 / 15000 N·m rotary torque is suitable for large-diameter and high-load conditions

The rotary system has a maximum torque of 30000 / 15000 N·m, corresponding to maximum speeds of 85 / 170 r/min. Larger hole diameters, intact hard rock, and high-friction hole sections require higher torque, while higher speeds can be used in drilling stages with lower resistance. During ultra-deep hole construction, parameters should be continuously adjusted based on torque, cuttings return, and drilling tool load.

🕳️ The 105–900 mm hole diameter range covers large water wells and engineering holes

The maximum hole diameter reaches 900 mm, which can accommodate larger well casings and higher-flow pump schemes. It also means that large-diameter construction places higher demands on the air compressor, drill bit, casing, torque, and lifting system. In actual projects, a reasonable hole diameter should be selected according to the well completion target, and it is not recommended to use the maximum hole diameter as a routine configuration for a long time.

💨 1.65–8 MPa air pressure and 16–120 m³/min air consumption

Recommended working air pressure for pneumatic DTH drilling is 1.65–8 MPa, with air consumption of 16–120 m³/min. 1200 m-class deep holes, large hole diameters, and hard rock conditions place extremely high demands on air compressor displacement. Air compressor selection must consider both pressure and flow rate. If displacement is insufficient, even if pressure meets requirements, there may be insufficient impact, difficult cuttings removal, and cuttings accumulation at the hole bottom.

💎 Deep hard rock construction such as granite, basalt, and limestone

After entering relatively intact hard rock, medium- and high-pressure DTH hammers can be used for drilling. In deep holes, the return distance for rock cuttings is long, and hole bottom cleaning is especially important. DTH hammer lubrication, controlled drill bit wear, and stable air volume should be ensured. If cuttings return continues to decrease or torque rises abnormally, the hole should be cleaned and drilling tools inspected in a timely manner.

🌧️ Upper loose layers require priority solutions for borehole wall stability

Soil layers, clay, sand layers, and gravel layers can use mud rotary drilling, casing, or other wall protection methods. For 1200 m-class ultra-deep wells, the stability of the upper hole section has a greater impact on subsequent construction. Once the upper section shrinks or collapses, deep drilling and tripping will become more difficult, so early hole stabilization cannot be omitted.

🧱 Fault fracture zones and deep fractured layers

When deep holes pass through faults, breccia, and fracture-developed zones, there may be block falling, air leakage, hole shrinkage, and sticking. After entering abnormal hole sections, propulsion should be reduced, hole cleaning strengthened, and casing, foam, or other treatment methods used as appropriate. If tripping resistance continues to increase, drilling should be stopped promptly for analysis.

💧 Deep aquifers and strong water inflow conditions

After entering the main aquifer, water inflow will change cuttings removal and DTH hammer working conditions in the hole. Construction personnel should record the depth of the main water-producing layers and adjust air supply, hole cleaning, and casing methods according to water volume. During well completion, filter pipes, sealing sections, and the final pump type should also be designed according to aquifer thickness and water quality conditions.

🏠 Large deep drinking water and community water supply

For areas with insufficient shallow water sources, large water supply populations, or large groundwater burial depths, the WR1200SL can be used for large deep drinking water wells and community water supply projects. Such projects should first complete hydrogeological surveys and water quality evaluations, then determine target layers, well diameter, and well depth, avoiding blindly pursuing maximum drilling depth.

🌾 Deep agricultural irrigation and large farm projects

Arid areas, large farms, and large-scale agricultural areas may require irrigation wells of more than 500 m or even deeper. The WR1200SL's 1200 m-class depth reserve and 9.6 m drill pipe configuration are suitable for long-cycle deep well construction. The actual well structure should be determined based on irrigation area, water output, and pump type.

⛏️ Large mining area water supply and deep groundwater development

Mining projects require domestic water, dust suppression, equipment cleaning, and auxiliary production water sources. The WR1200SL's 60 T lifting force, heavy-duty crawler chassis, and dual-power configuration are especially suitable for deep well projects in large mining areas. If a fixed drilling site in a mining area has access to the power grid, an electric solution can be configured as needed.

🌊 Mine dewatering and large engineering dewatering holes

The 1200 m-class drilling depth and 900 mm maximum hole diameter enable the equipment to handle some large dewatering boreholes. Dewatering projects must design well locations, well spacing, hole diameter, filter pipes, and pump capacity based on hydrogeological conditions. The drilling rig is only responsible for hole completion and cannot replace a complete dewatering plan.

♨️ Geothermal surveys and temperature gradient boreholes

The WR1200SL can be used for some geothermal surveys, temperature gradient holes, and deep formation temperature verification. In addition to drilling depth, geothermal projects also need to consider formation temperature, circulation medium, casing material, and borehole wall stability. If it is a formal geothermal development well, drilling tools and well completion systems should be configured according to special design.

🚀 29 m/min fast lifting and 51 m/min fast propulsion

Fast lifting speed is 29 m/min, and fast propulsion speed is 51 m/min, mainly used for power head return, drill pipe handling, and non-drilling actions. Ultra-deep hole projects have long construction cycles, and the auxiliary time saved each time accumulates significantly over the long term. Especially with 9.6 m long drill pipes, it can further increase the equipment's effective working time.

⚡ 264 kW Cummins diesel power provides high-load reserve

The diesel power configuration is a 264 kW Cummins engine, providing power for rotation, feed, crawler travel, outriggers, and auxiliary systems. 1200 m deep holes usually involve long continuous operation, so engine cooling, air filtration, fuel system, and hydraulic oil temperature maintenance should be strengthened to avoid power decline caused by high temperature and dust.

🔌 Electric mode is more suitable for fixed projects and long-term construction

If a mine, industrial park, or fixed drilling site has a stable power supply, an electric drive system can be configured according to the project power grid. Electric mode helps reduce fuel consumption and on-site exhaust, but voltage, frequency, transformer capacity, cable distance, and starting current must be confirmed in advance and cannot be simply converted directly from diesel power.

🧵 5 T + 2.5 T dual auxiliary winches improve on-site handling capacity

The equipment is equipped with a 5 T large auxiliary winch and a 2.5 T small auxiliary winch, which can be used respectively for heavier drilling tools, DTH hammers, casing, and general accessory handling. 1200 m-class projects have many supporting tools and large individual weights. Dual winches can improve on-site organization efficiency, but lifting operations must strictly comply with rated loads and safe distances.

🚜 6 km/h crawler travel improves relocation efficiency within large sites

Travel speed is about 6 km/h, and the maximum climbing angle is approximately 21°. For 25 T heavy-duty equipment, this travel capability is mainly used for relocation within the site and between hole positions. Before moving, road bearing capacity, slope, turning radius, and soft ground conditions must be confirmed, and the long mast should be in a safe transport state.

🦵 1.7 m hydraulic outriggers ensure stable operation for large ultra-deep holes

Hydraulic outrigger stroke is 1.7 m, which can be used for equipment leveling and stable support. Ultra-deep hole construction has long cycles, and the equipment bears drill string and rotary loads for a long time. Outrigger settlement and platform unevenness will affect hole deviation and mast stress. Sufficiently large pads should be laid on soft ground.

📦 25 T complete machine transport and site organization requirements are higher

The complete machine weighs about 25 T, with overall dimensions of about 10.85 × 2.25 × 2.98 m. Cross-regional transport requires advance confirmation of flatbed load capacity, road height limits, bridge bearing capacity, and turning space; 9.6 m drill pipes usually also need to be transported separately. After arriving at the site, space should also be reserved for the air compressor, mud system, and material area.

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

Different formations and projects can be equipped with mud pumps, centrifugal pumps, generators, and foam pumps. Projects with many loose layers rely more on mud systems, hard rock deep holes rely more on large-displacement air compressors and DTH hammers, and fractured air-leakage formations may use foam assistance. The combination should be based on the main working conditions rather than uniformly stacking all accessories.

⚠️ Precautions for 1200 m ultra-deep hole construction and dual-power systems

Before daily work begins, check the engine, electrical system, hydraulic system, telescopic mast, outriggers, crawlers, dual winches, high-pressure air pipes, and long drill pipes; during deep hole construction, continuously record torque, air pressure, cuttings return, water return, and tripping resistance; when switching to or using the electric solution, confirm grounding, protection, and power supply capacity according to project electrical specifications.

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