WR1500S

💧 WR1500S 1500m Telescopic Mast Crawler Water Well Drilling Rig

The WR1500S is a heavy-duty crawler-mounted fully hydraulic drilling rig designed for large deep-hole projects such as 1500-meter-class ultra-deep water wells, mining water supply, industrial water, dewatering, and geothermal surveys. The equipment adopts a telescopic mast structure, supports 9.6 m drill pipes, has a maximum drilling depth of 1500 m and a drilling diameter of 105–1000 mm, and is equipped with 80 T lifting force, 31000 / 15500 N·m rotary torque, and 264 kW diesel power. It is suitable for projects with long construction cycles, large hole diameters, complex formations, and high requirements for drill string control.

🌐 1500-meter-class positioning suitable for truly ultra-deep groundwater development

Compared with 1000-meter and 1200-meter-class equipment, the WR1500S further expands the scope of deep groundwater construction. For areas where shallow aquifers cannot meet demand, deep water-bearing layers are buried deep, or projects require greater drilling depth margin, 1500-meter-class equipment can provide more sufficient construction capability. The actual well depth should still be determined based on hydrogeology, hole diameter, drill pipe, air compressor, and well completion design.

🪜 Telescopic mast balances working height and transport convenience

The WR1500S adopts a telescopic mast structure, which ensures the working height required for deep-hole construction while improving the overall dimensions in transport condition. For 28 T-class heavy equipment, road passage, loading, site turning, and internal site transfers all require advance planning. The telescopic mast helps reduce the transport difficulty caused by a fixed long mast.

🔩 9.6m drill pipe reduces jointing frequency in ultra-deep holes

The equipment supports 9.6 m drill pipes, with recommended drill pipe diameters of 114 / 127 mm. If short drill pipes are frequently used in 1500-meter-class deep holes, the number of connections and auxiliary time will increase significantly. Long drill pipes can reduce connection frequency and improve continuous drilling efficiency, while also requiring sufficient operating space and more standardized drill pipe handling organization at the construction site.

💪 80 T lifting force provides margin for ultra-deep drill strings and casing handling

The WR1500S has a lifting force of 80 T and an axial pressure of 16 T. As hole depth increases, the self-weight of the drill string, borehole wall friction, casing weight, and local sticking all increase significantly. Greater lifting capacity is beneficial for normal tripping, drill tool recovery, and some large-size casing operations, but in the event of abnormal resistance, priority should still be given to hole cleaning, slow lifting, and judging downhole conditions.

🔄 31000 / 15500 N·m high-torque rotary system

The maximum rotary torque is 31000 / 15500 N·m, and the maximum rotary speed is 70 / 140 r/min. Low speed and high torque are more suitable for large-diameter, hard rock, and high-friction conditions, while higher speed is suitable for stable hole sections with relatively low resistance. During ultra-deep hole construction, adjustments should be made dynamically according to drill string load, cuttings return, and drill tool condition.

🕳️ 105–1000 mm hole diameter covers large deep wells and engineering holes

The WR1500S has a drilling diameter range of 105–1000 mm, covering conventional deep water wells, large-diameter groundwater wells, mining dewatering, and some large engineering holes. The larger the hole diameter, the higher the requirements for the air compressor, drill tools, casing, rotary torque, and lifting capacity. Therefore, actual projects should select a reasonable hole diameter according to the well completion target.

💨 1.65–8 MPa air pressure suitable for deep-hole DTH drilling

When using DTH hammer drilling, the recommended working air pressure is 1.65–8 MPa, and the air consumption is 16–120 m³/min. 1500-meter-class deep holes and large-diameter hard rock projects have very high requirements for air compressor displacement. Pressure and displacement must simultaneously meet the needs of the DTH hammer and bottom-hole cuttings removal; otherwise, insufficient impact, difficult cuttings removal, and bottom-hole cuttings accumulation may occur.

💎 Working conditions in hard rock, weathered rock, and fractured zones

In relatively intact rock formations such as granite, basalt, and limestone, medium- and high-pressure DTH hammers can be used for drilling. When encountering weathered rock, fissures, or fault fracture zones, the feed speed should be reduced, hole cleaning should be strengthened, and casing, foam, or other hole stabilization measures should be used according to actual conditions. If cuttings return continues to decrease or tripping resistance increases significantly, drilling should be stopped promptly for inspection.

🌧️ Priority should be given to ensuring borehole wall stability in loose overburden

Soil layers, clay, sand layers, and gravel layers can be drilled using mud rotary drilling, casing, or other wall protection methods. For 1500 m ultra-deep wells, once diameter reduction or collapse occurs in the upper hole section, it will directly affect subsequent deep construction. Therefore, during the opening stage, priority should be given to establishing a stable borehole before entering rock layers and switching to DTH drilling.

💧 Deep aquifers and strong water inflow conditions

After entering the main aquifer, water inflow will change the cuttings removal and DTH hammer working state in the hole. During construction, 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 volume. During the well completion stage, filter pipes, sealing sections, and the final pump type also need to be designed based on aquifer distribution.

🏭 Industrial water supply, mining water supply, and large groundwater projects

The WR1500S is suitable for large industrial water supply, mine domestic water, dust suppression, equipment cleaning, and auxiliary production water supply. For mining and industrial projects with insufficient shallow water sources, a high proportion of hard rock, or the need for deeper water-bearing layers, the 1500-meter-class depth reserve and 80 T lifting force can provide greater construction margin.

🌊 Mining dewatering and large engineering dewatering

The 1500-meter-class drilling depth and 1000 mm maximum hole diameter enable the equipment to undertake some large dewatering boreholes. Dewatering projects must determine hole locations, well spacing, well diameter, filter pipes, and pump capacity based on hydrogeological data. The drilling rig is only responsible for hole completion and cannot replace complete dewatering design.

♨️ Geothermal surveys and deep temperature gradient holes

The WR1500S can be used for some geothermal surveys and deep temperature gradient boreholes. In addition to drilling depth, such projects also need to consider formation temperature, circulation medium, casing material, and borehole wall stability. If formal geothermal development wells are involved, drill tools and well completion systems should be configured according to special design.

🧵 Dual auxiliary winches improve on-site organization efficiency for large deep holes

The equipment is equipped with a 5 T large auxiliary winch and a 2.5 T small auxiliary winch, which can be used for handling DTH hammers, drill pipes, casing tools, and general accessories. Ultra-deep hole projects have many supporting tools and heavy individual pieces. Dual winches can reduce manual handling intensity, but lifting operations must strictly comply with rated loads and safety distances.

📦 28 T complete machine requires complete transport and site planning

The complete machine weighs about 28 T, with overall dimensions of about 11.5 × 2.6 × 3.5 m. Cross-regional transportation requires advance confirmation of flatbed load capacity, road height limits, bridge load-bearing capacity, and turning space; 9.6 m drill pipes usually need to be transported separately. After arriving at the site, space should also be reserved for air compressors, mud systems, drill tools, and material areas.

⚠️ Precautions for 1500m ultra-deep hole construction and maintenance

Before starting work each day, check the engine, hydraulic system, telescopic mast, outriggers, tracks, dual winches, high-pressure air pipes, and 9.6 m drill pipes; during deep-hole construction, continuously record torque, air pressure, cuttings return, water return, and tripping resistance; if trend abnormalities are found, stop the machine promptly for analysis to avoid small problems developing into deep-hole accidents.

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