ODEX 90 Eccentric Overburden Casing Drilling System drilling with DTH hammer/top hammer

For small-hole sizes, Prodemo produces the ODEX Eccentric Overburden Drilling System, starting with the
ODEX90 to suit 114mm O.D. casings. This two-piece system comprises the shanked bit holder and the eccentric
pilot bit that is secured in the bit holder by a double interlocking pin. This is easily removed to allow for bit are
sharpening or replacement. Prodemo ODEX overburden drilling systems are widely used in a variety of applications
from well drilling and minipilling to rock anchoring and site investigation.

Application Range: It is suitable for drilling water wells , geothermal wells , short mircopiles ,medium mini-type grouting
hole of building , dam and harbour project .
1. When drilling starts , the reamer swings out and reams the pilot-hole wide enough for the casing tube to slide down
behind the drill bit assembly
2. When the required depth is reached , rotation is reversed carefully, whereupon the reamer swings in , allowing the
drill bit assembly to be pulled up through the casing.
3. Casing tubes that are to be left in the drill hole should be sealed at the bottom of the hole by means of cement grout
or some other sealing agent.
4. Drilling continues to the desired depth in the bedrock using a conventional drilling.

How to order?
Casing Tube Out Diameter & Inner Diameter + Reamer Bit Diameter + Minimal Casing Shoe Inner Diameter
+ Hammer Shank Style

Technical Data