Down the Hole (DTH) Drilling

A down-the-hole drill, usually called DTH is mainly a pneumatic powered rock or ground drill, in which the percussive hammer is located directly behind the drill bit, so the percussion mechanism follows the bit down into the drill hole. The drill pipes transmit the necessary feed force and rotation to the DTH hammer and bit, as well as compressed air for the DTH hammer. Air flushes cuttings up from the bottom of the hole. Drill pipes are added to the top of the drill string as the hole gets deeper. The piston directly strikes the impact surface of the bit, while the hammer casing gives guidance to the drill bit. The fast hammer impact breaks hard rock into small particles, which are blown up by the air exhaust from the DTH hammer.

Robit Down the Hole business line covers all operations related to the down-the-hole drilling method. The main product categories consist of DTH hammers, DTH bits and DTH tubes. The selection is competitive and encompasses top quality products for all your drill & blast as well as well-drilling applications.

Robit competitive offering in Down the Hole drilling tools:

• Unbeatable DTH Hammers – Wide range of all sizes of blast hole, general purpose, well-drilling, and reverse circulation hammers. The hammers have robust design as well as minimized fuel consumption and optimized air flow with the highest performance.
• Efficient DTH Bits – For drilling blast holes, wells; for general purposes as well as RC models for sampling. Robust designs for achieving maximum penetration rate in hard and abrasive rock conditions.
• Robust Casing Advancing Systems – Sizes from 114.3 mm up to 1524 mm. Wide range of ring bit, wing bit, eccentric and drill through models. Proven quality worldwide – references in all applications.
• Reliable Shock Absorbers – Efficient dampening available for hammers from 2” up to 33”.
• Strong Drill Pipes – Single pipes available from OD 76 mm up to 323 mm sizes and double pipes from OD 406 mm up to 1220 mm. Tool joints API reg. and HEX standards.
• Wide range of Accessories – Wide range of subs, check valves, hammer sleeves, air hoses, and chain keys. Ask for more: sales@robitgroup.com

Proven quality – manufactured with automated production lines

Robit guarantees you:

• Lower fuel consumption
• Best in class performance
• Unbeatable in all conditions
• Longer wear resistance

Drill FURTHER and FASTER with these high penetration rate drilling tools