Whether you are drilling a household drinking water well or an industrial deep well, the following parameters should be given priority when choosing a drilling rig:

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1. Key performance indicators

Drilling depth:

Shallow drilling rig: 50-150m (household/irrigation well)

Medium-deep type: 150-600m (community water supply/agriculture)

Ultra-deep type: 600-1200m (geothermal well/mine drainage)

Aperture range:

Standard model: Φ150-500mm (suitable for PVC/steel pipe)

Expansion capacity: Φ800mm can be reached through the reamer (torque required>18,000N·m)

Power configuration:

Diesel engine power: 110-450kW (turbocharged models are recommended for plateau areas)

Hydraulic system pressure: 35-42MPa (high-pressure system improves hard rock penetration efficiency)

2. Formation adaptability parameters

Torque-speed combination:

Impact frequency (down-the-hole hammer model):

Granite layer: 18-25Hz (with wind pressure 1.2-2.5MPa)

Basalt layer: high frequency 28-35Hz is required

3. Customer cost-sensitive parameters

Fuel efficiency:

Soft rock conditions: 15-20L/h (diesel engine)

Hard rock conditions: 25-35L/h (optimized models can reduce consumption by 12%)

Drill rod life:

Friction welding rod: drilling meters ≥15,000m (unit price ￥800-1200/section)

Ordinary rod: ≤8,000m (unit price ￥400-600/section)

Operation and maintenance cycle:

Lubricating oil replacement: every 200 hours or 50,000m³ rock cuttings

Hydraulic filter: mandatory replacement every 500 hours

4. Intelligent function parameters

Automatic deviation correction system:

Accuracy: ±0.5°/10m (to ensure wellbore verticality)

Gyroscope + tilt sensor real-time feedback

Lithology identification system:

Predict formations through hydraulic pressure/speed change rate (accuracy > 85%)

Remote monitoring:

4G/satellite data transmission, support PC-side real-time drilling analysis

5. Safety and environmental parameters

Noise control:

Sound cover model ≤75dB (national standard requirement <85dB)

Muffler is required for nighttime construction

Mud circulation system:

Environmentally friendly configuration: mud purification rate >90% (reduce wastewater treatment costs)

Circulation box capacity: ≥8m³ (200m deep well requirement)

Selection suggestions

Matching budget and demand: 300,000 yuan light drilling rig can meet 80% of civil water well needs, while large projects recommend the selection of 800,000-1.5 million yuan full hydraulic models.