Our team recently completed a down-the-hole drill efficiency verification at a hard lateritic soil site in Uzbekistan. The local geological structure is hard, containing a large amount of gravel. Traditional rotary drills experienced significantly reduced drilling speeds at the same depth, poor cuttings removal, and gradually increasing fuel consumption.
We conducted a comparative test using a down-the-hole hammer under the same geological conditions, and the results were very significant:
1. Significantly Improved Drilling Speed
The down-the-hole drill maintained a stable penetration speed under high-frequency impact, with an average drilling speed 2.3–3.1 times higher than that of traditional rotary drills.
In the test segment shown in the video, the formation contained water and high-density clay, yet it was still able to continuously break the rock and drill down rapidly.
2. Lower Fuel Consumption and More Stable Costs
Due to the reduced single-hole time, the equipment did not need to idle for extended periods or undergo repeated adjustments, resulting in an overall fuel consumption reduction of approximately 25–30%.
For teams undertaking long-term construction projects, this translates to a more controllable cost structure.
3. Cleaner Slag Removal and Greater Hole Stability
The advantages of pneumatic slag removal with a down-the-hole hammer were clearly demonstrated on-site:
High-pressure airflow continuously pushes mud and gravel out of the hole bottom
Reducing the number of repeated hole cleanings
Cleaner hole walls, resulting in smoother subsequent casing installation
After the project, the local construction team stated:
“Previously, the biggest headache wasn’t the inability to drill, but the incomplete slag removal and high fuel consumption. The down-the-hole drill truly solved these two core problems.”
This is a typical case illustrating that in complex geological formations, down-the-hole drills are not only faster but also reduce long-term operating costs.
We welcome industry peers to share more experiences with the application of down-the-hole drills in Central Asia.
