ODEX Casing (Eccentric) is application on drilling water well, geothermal well, micro-pile, Medium and mini grouting hole of building.

ODEX (short for “Overburden Drilling Excentric”) is also calledStratex, Tubex or ODS. It is an adaptation of the air-circulation DTH hammer. 

It is with a swing-out eccentric bit to ream the bottom of the casing.

And the percussion bit consists of two parts fixed tips: a concentric pilot bit, and behind it is an eccentric reamer bit that 

swings out to enlarge the borehole diameter during drilling. After the eccentric bit is a guide device 

that engages a special internal shouldered casing shoe on the bottom of the ODEX casing.

The ODEX is thus pulled down by the drill string as the hole is advanced. 

Cuttings blow up through the annulus gap between guide device and casing shoe to a swivel conducting them onto the ground or to a sample collector. 

How to use?

1.Before start drilling, the reamer swing out and reams the hole wide ensure the casing tube to slide down along with the drilling strings

2.When the required depth is reached, Reamer rotated in reversed direction, so that the reamer swing in, and when the drilling strings to be pulled up through the casing

3.To pull up the casing tube and grouting with some material to fill into the bottom of the hole

4.To continue the drilling with conventional drilling tools the bedrock