DTH Hammer Drilling

How is DTH Hammer Drilling utilized and what is it?

The "Down-the-Hole" or DTH Hammer Drilling is used to drill holes through a number of rock types, and the variety of these holes is far more now than it was when early blast hole drilling was first invented.

When compared to drifter DTH Hammer Drilling, which hammer on top of the drill string, "Down-the-Hole" refers to where the DTH Hammer Drilling action takes place. As opposed to a drifter (top hammer) rigs, the DTH Hammer Drilling piston always makes direct contact with the DTH drill bits, and there is typically no loss of transmitted energy as the DTH hammer drill bits drills deeper.

Why is the DTH approach preferred today?

Despite having their origins in quarries, DTH hammer bit is now well-liked in the drilling sector, where they are the go-to choice because of their major benefits over other methods, especially：

• Capable of drilling in almost all rocks,hard, medium to soft

• Has higher penetration rates than other methods; 

• Is less expensive; 

• Produces straighter, cleaner holes

• More affordable; available in a wide variety of hole sizes; 

• Quieter than other percussive systems

The quarrying, waterwell, site investigation, civil engineering, and mining industries all over the world are becoming more and more aware of the benefits of using DTH hammers, however, because drifter drilling slows down more and more as it goes deeper, unlike DTH hammers, and because the latter can drill what a cable tool rig takes weeks to do.