mainly used for gas drainage hole, drainage hole, grouting hole, geological and hydrology drilling.

Usually drill bits are three wings or four wings.

Our drill bits adopt 2 cutters, flat and dome-shaped cutters ,

The flat cutters have high abrasion resistance and fast drilling efficiency, suitable for drilling ordinary formation.

The dome-shaped cutters have high impact resistance and stable drilling performance, suitable for formations with hard interbed layers.

Our diameter is from 60mm to 153mm, any special design is available upon customers' requestment.