THE BASIC PRINCIPLES OF CGWA GUIDE LINE

Percussion drilling devices are commonly used for drilling in tough rock formations. These devices work by consistently lifting and dropping a weighty drill little bit onto the ground surface area. The instructions failed to get the job done. I couldn't Adhere to the instruction. this information didn't explain my problem. This is a stupid subject

In DTH drilling, the percussion system – normally called the hammer – is located instantly higher than the drill bit. The drill pipes transmit the required feed power and rotation to the hammer along with the bit, combined with the fluid (air, water or drilling mud) accustomed to actuate the hammer and flush the cuttings. DTH Drilling products