Water well drilling rig selection guide and practical case analysis
Water well drilling rig is the core equipment for groundwater resource development, and its performance directly affects the efficiency and quality of well completion. This article analyzes key parameters and selection strategies based on typical engineering cases.
1. Drilling rig types and applicable scenarios
| Type | Drilling depth | Typical hole diameter | Applicable strata | Power configuration |
| Car-mounted rotary drilling rig | 50-300m | Φ150-400mm | Soil layer, gravel layer | Diesel engine 132-220kW |
| Fully hydraulic crawler drilling rig | 200-800m | Φ200-600mm | Medium weathered rock layer | Motor + hydraulic 250kW |
| Pneumatic down-the-hole hammer drilling rig | 300-1200m | Φ100-300mm | Hard rock, granite | Air compressor 12-25m³/min |
| Multi-function rotary drilling rig | 30-150m | Φ600-1500mm | Loose layer, pebble layer | Diesel engine 300-450kW |
2. Special function parameters
Automatic rod changing system: 8 seconds/rod (compared to 2 minutes/rod for manual rod changing)
Digital control: Well inclination monitoring accuracy ±0.1°/10m
Modular design: Drilling rig-pump unit switching completed in 2 hours
III. Typical case analysis
Case 1: People's livelihood water well project in arid areas of Africa
Working conditions:
Stratum: basalt (compressive strength 180MPa)
Requirements: Well depth 600m, water output > 10m³/h
Equipment selection:
Pneumatic down-the-hole hammer drill (air compressor 21m³/min)
Φ152mm drill bit, DTH hammer impact Frequency 900 times/minute
Construction data:
Average drilling speed: 4.2m/h
Total time: 8 days (including lowering pipe and well washing)
Cost: $185/m (including materials and labor)
Please tell us your detailed requirements, we can offer better service for you. Contact Email: [email protected]
Baichuan Intelligent Equipment Manufacturing Co., LTD
Email：[email protected]
