products

innerbanner

Application range

It is recommended to drill in rock formation where there are some ovals and fractures.

Design principles

Stable and reliable working performance and less vibration of the drill rig.

Outstanding advantages

Concentric system with ring bits, wing and blocks.

Concentric casing systems

A D G
Discharge Head DTH hammer Casing shoe
B E H
Drill rod Casing tube Ring
C F
Guide sleeve Pilot bit