Concentric Wing system overburden drilling bit

Product Description

In the projects of dirling,drilers often meet with problems due to the loose land formation.These may cause troubles such as dificulty in diling down,collapse ofholes, damage of diling tools,etc.To solve the problems,the best way is to use (0DEx 0verburden briing System which can prevent holes and dirling tools from damageandsupport the holes by casing tubes

General  introduction

1 .drill in overburden unstable rock

2.one step to drill and follow casing

3.flexible to open or close

4.effecient below 300mm