company news about How To Use DTH Hammer Bits?

The pressure regulating mechanism of the drill bit advances while the bit is in use to continuously push the drill bit and maintain contact with the rock at the bottom of the hole. Because of the rotating mechanism, the drill is constantly rotating. The drill bit continuously receives impact energy from the impactor piston mounted at the front of the drill pipe. As a result, the drill bit descends to the bottom of the hole and creates an impact force that crushes the rock. The rotation of the drilling equipment prevents the drill bit from continuously hitting the same hole trace and creating shear forces that scrape the rock at the bottom of the hole. The rock is constantly broken and shear under the impact force of the impactor piston and the shear force of the rotating mechanism. By blowing the slag from the annular area between the drill pipe and the hole wall out of the hole, the air pressure enters through the gas joint and descends through the hollow drill pipe to form the blasting hole.

How To Use DTH Hammer Bits?

1) When drilling with a tube using a downhole impactor, it is best to immediately follow up the longer casing with a downhole impactor bit.

2) The first casing shall not be placed unevenly, and the verticality of the casing shall be maintained at a maximum of 2° (allowable deviation of 3mm/m). To prevent the casing from falling off, it should be welded or joined with left-hand thread.

3) Foam is most suitable for drilling, as well as lubrication performance of DTH impact drill bits. Can be used to make casing follow through smoothly.

4) Drilling can only be done at a speed of 18 to 25 rpm; High speed should not be used. The drilling weight should be selected according to the formation. It is best to maintain a constant drilling rate.