Selection Guide for Drilling Rigs in Different Geological Formations

Selection Guide for Drilling Rigs in Different Geological Formations

I. Soil Drilling

Applicable Equipment: Spiral drilling rig or light rotary drilling rig

Technical Highlights: No complex wall protection required, direct cuttings removal, low-to-medium speed drilling to prevent drill bit jamming

Advantages: High efficiency, flexible movement

II. Sand Drilling

Core Equipment: Fully hydraulic rotary drilling rig + mud system

Key Technologies: Must be equipped with mud wall protection, strict control of viscosity and specific gravity

Key Processes: Must complete "downsinking filter + gravel filling", otherwise well collapse and water turbidity are likely

III. Rock Drilling

Specialized Equipment: Down-the-hole hammer drill

Core Configuration: Matching high-power air compressor (≥12m³/min)

Operational Focus: Control impact parameters, timely inspection and replacement of drill bits, prevention of stuck drill bits in fractured rock formations Drilling

IV. Complex Formations

Recommended Solution: Modular Multi-functional Drilling Rig

Coping Strategy: Switch drilling methods between layers (soft top, hard bottom), or select a dual-power head model.

Intelligent Assistance: Equipped with lithology identification sensors for automatic parameter adjustment.

V. Selection Process

First, Survey: Sampling and creating stratigraphic profiles.

Second, Match: Select a dedicated machine for single formations, and a multi-functional machine for complex formations.

Followed by Configuration: Prepare mud pumps for sand formations, and various drill bits for rock formations.

VI. Practical Suggestions

Consider Needs: Short-term rental, long-term investment.

Consider Process: Equipment without gravel filling technology should not be selected for sand formations.

Consider Risks: For complex formations, it is recommended to cooperate with a professional team.

Scientifically matching equipment can improve efficiency by more than 30% and reduce the accident rate by more than 60%. The core is: understanding the formation, accurate selection, and standardized processes.