Selection Points for Water Well Drills at Different Depths in Red Clay Areas

1. Shallow Wells (<50m Depth)

• Choose small rotary drills or portable impact drills.
• Small rotary drills: Simple operation, suitable for soft/thin red clay via rotational cutting.
• Portable impact drills: Compact, easy to transport, efficient for shallow wells through impact crushing at low costs.

2. Medium Wells (50–150m Depth)

• Opt for positive/negative circulation mud-flushed turntable drills.
• Mud circulation carries cuttings to handle red clay characteristics.
• Negative circulation drills excel in red clay with sand-gravel due to stronger debris discharge.

3. Deep Wells (>150m Depth)

• Hydraulic power head drills are the first choice.
• Provide strong torque and power for efficient red clay cutting.
• Facilitate easy drill tool handling and casing running to meet deep drilling needs.