Download - Atlas Copco

Overburden
drilling
As much as 90% of the land surface of the earth is covered
with loose, unconsolidated material such as soil, clay, silt,
sand, gravel and boulders, which varies in depth from a few
centimetres to hundreds of meters.
Drilling through this so-called overburden is often problematic,
due to the tendency of the earth to cave in behind the drill bit.
This makes it difficult to retrieve the drill string after the hole
has been drilled. In practice, the bore hole is often lost before
a casing tube can be inserted to support it.
Other problems are caused by cavities or porous ground,
which interfere with the circulation of the flushing medium and
prevent the drill cuttings from being flushed out of the hole.
In places where overburden strata are mixed, or when their
drillability is unknown, it is difficult for the driller to decide
what tools to use in order to get the best overall results
without risking the loss of equipment in the hole.
The best solution for dealing with such problems is to use
ODEX TM equipment.
CONTENTS
The ODEX method 3
ODEX drilling step-by-step 4
Rock drill recommendations 4
The ODEX product range, data 5
ODEX 90T-G2 6-7
ODEX 115T-G2 8-9
ODEX 140T-G2 10-11
ODEX 165T-G2 12-13
ODEX 90W-G2 14-15
ODEX 115W-G2 16-17
ODEX 140W-G2 18-19
ODEX 165W-G2 20-21
ODEX 190W-G2 22-23
ODEX 240W-G2 24-25
ODEX 76T, ODEX 76W 26-27
ODEX 90/115 28-29
Auxiliary tools 30-31
Ball locking system ODEX G2 33
Dimensions 34-35
Recommendations, DTH Hammers 36
Conversion factors 38
Weights and cross index 39
Designs and product range are subject to alteration
without prior notice.