What is down-the-hole (DTH) drilling?

Down-the-hole (DTH) drilling has made it easier for contractors to drill wells faster and more efficiently, and to transition from dirt boring to rock boring just by adding a compressor and hammer to the drill bit.

Why do you need a down-the-hole drilling tool?

Down-the-hole drilling tools are capable of delivering high-performance results in various geological conditions, ensuring reliable and efficient water well construction. This makes them a preferred choice for ensuring access to clean and sustainable water sources.

How does a down-the-hole drill work?

Down-the-hole drills consist of various components such as hammers, bits, and pipes that work together to create boreholes. The hammer delivers rapid blows to the bit, while air pressure removes debris from the hole. These tools are designed to withstand high-impact forces and provide exceptional performance in challenging environments.

How does DTH drilling work?

With DTH drilling, contractors can change the drill that they were using for the current directional bore to a rock drill when they encounter rock by connecting the drill with a compressor and a steerable hammer. Well drilling also needed changes to be made to rotary drilling when the well needed to take a turn.

Why is DTH drilling better than rotary drilling?

DTH drilling is often favored over rotary drilling for its ability to penetrate hard rock formations more effectively. This method is also preferred when precision and accuracy are crucial, as the hammer impact allows for a controlled and consistent drilling process.

How long did it take to drill a 12,000 ft hole?

The original estimate for completion of a 12,000-foot hole was 30 days using the conventional rotary technique, which was reduced to 13 days using the DTH method. Before DTH was used, drillers would typically case the vertical portion of the well and convert to rotary drilling to drill at a tangent.