Official Export Subsidiary of Kaishan Group (Est. 1956) | Quzhou Manufacturing Base
Our Quzhou engineering desk calculates the exact borehole diameter, rock hardness, and necessary CFM/Bar ratio for your project.
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Kaishan DTH Drilling Rigs
Heavy-duty surface crawlers and integrated rigs for open-pit mining, quarry blasting, and slope stabilization. High penetration rate and anti-jamming hydraulic system.
EQUIPMENT CATEGORIES
Direct Overview: The Kaishan KW300 is a compact, highly versatile crawler-mounted water well and geothermal drilling rig engineered to drill diameters from ⌀140 mm to 325 mm down to a maximum depth of 300 meters. Powered by a fuel-efficient 85 kW Yuchai turbocharged diesel engine delivering 7,500 N·m rotary torque and an 18-ton (180 kN) pullback force, it weighs just 7.2 tons with a 2.0-meter narrow chassis width. Featuring a hybrid "Gas & Water" dual-mode system, it supports both high-pressure DTH air hammer drilling (17–30 bar) for hard rock and mud rotary pumping for soft soil, achieving fast penetration rates of 15–35 m/h.
Water well contractors working on farm irrigation, rural village drinking supply, and residential ground-source heat pump boreholes often face tight access constraints such as narrow village lanes, residential courtyards, and soft farm soil. Additionally, penetrating mixed geology—from sticky clay and loose gravel to hard granite bedrock (f=6–20)—typically requires bulky, expensive machinery.
The Kaishan KW300 provides an ultra-compact, high-efficiency solution. Operating up to 10 times faster than conventional rotary table drills, its large-hollow-spindle top drive allows drillers to alternate effortlessly between high-pressure compressed air percussion, foam flushing, and heavy mud pump circulation. At just 7.2 tons operating weight, the KW300 combines rapid site transposition with minimal ground disturbance and exceptionally low fuel consumption.
Equipped with an 85 kW Yuchai industrial diesel engine driving a patented parallel gearbox with an independent hydraulic oil pump design. Provides balanced power distribution, low operating costs, and simple field maintenance.
Patented composite arm and dual-cylinder lifting mechanism generate 18T (180 kN) rig lifting force with an advance stroke of 3.3/4.8 meters, easily handling standard 1.5m, 2m, and 3m drill pipes with high safety margins.
Integrated casting gearbox with dual hydraulic rotary motors delivers 5,700–7,500 N·m torque and 40–70 r/min rotation speed. Large hollow spindle bore enables seamless mud, air, and foam drilling.
Four heavy-duty hydraulic outriggers feature a 1.4-meter stroke. Enables instant chassis leveling on slopes and rough ground, allowing the rig to self-load and unload onto flatbed transport trailers without a mobile crane.
Features a compact 4.1m transport length, 2.0m width, and 30° climbing capacity. Rubber or steel crawler options provide high maneuverability in tight residential courtyards and orchards with minimal turf damage.
Equipped with a 2-ton auxiliary hydraulic tool winch, stroke limiter to protect hydraulic cylinders, soft hose protection sleeves, and dedicated ports for onboard welding and foam injection pumps.
| Technical Parameter | Specification / Engineering Value |
|---|---|
| Maximum Drilling Depth | 300 m (approx. 984 ft) |
| Borehole Drilling Diameter | ⌀140 – 325 mm (5.5 – 12.8 in) |
| Drilling Methods | DTH Air Hammer Percussion, Foam Mist & Mud Rotary Pumping |
| Diesel Engine Model & Power | Yuchai Turbocharged Diesel Engine, 85 kW |
| Rig Pullback / Lifting Force | 18 Tons (180 kN) |
| One-Time Advance Stroke | 3.3 m / 4.8 m (Accommodates 1.5m, 2m, 3m drill pipes) |
| Rotary Head Torque | 5,700 – 7,500 N·m |
| Rotary Head Rotation Speed | 40 – 70 r/min |
| Working Air Pressure Range | 17 – 30 bar (1.7 – 3.0 MPa / 246 – 435 psi) |
| Air Consumption Demand | 17 – 36 m³/min (matching screw air compressor) |
| Average Penetration Efficiency | 15 – 35 m/h (geological formation dependent) |
| Compatible DTH Hammers | 5-inch, 6-inch, 7-inch, 8-inch medium & high pressure series |
| Applicable Drill Pipe Length & Diameters | Lengths: 1.5m, 2m, 3m | Diameters: ⌀76 mm, ⌀89 mm, ⌀102 mm |
| Auxiliary Winch Hoisting Capacity | 2 Tons (20 kN) |
| High Hydraulic Outrigger Stroke | 1.4 m (Self-loading on flatbed transport trucks) |
| Tramming Speed & Gradeability | 0 – 2.5 km/h | 30° Climbing Capacity |
| Overall Machine Dimensions (L×W×H) | 4,100 × 2,000 × 2,500 mm |
| Total Operating Weight | 7,200 kg (7.2 Tons) |
To achieve maximum penetration across 140–325 mm boreholes down to 300 meters, the KW300 pairs seamlessly with standard portable compressors and mud pumps:
Kaishan LGCY-18/17 or KSCY-580/13 (13–17 bar, 16.5–18 m³/min) for fast rock penetration with 5"/6" DTH hammers.
BW-160 or BW-200 reciprocating mud pumps for borehole wall stabilization and drilling through loose sand, gravel, and clay.
A: The KW300 is rated for drilling depths up to 300 meters (984 ft) with hole diameters from 140 mm to 325 mm, powered by an 18-ton lifting force mast.
A: The KW300 is lighter and more compact (7.2T weight, 4.1m length) with a 300m depth rating, 18T pullback, and 85 kW engine, making it exceptionally economical for rural contractors. The KW350 provides a 350m depth rating, 22T pullback, 92 kW engine, and 6.6m stroke for 6-meter rods (8.6T weight).
A: Yes. The four hydraulic outriggers feature a 1.4-meter stroke, allowing the rig to elevate above standard flatbed trailer height so the transport truck can drive underneath directly, eliminating crane rental expenses.
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Founded in 2022 in Quzhou City, Zhejiang Province. Operating as the global integrated export arm of Kaishan Group, delivering heavy-duty DTH drill rigs, water well exploration machinery, and screw air compressors worldwide.
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