Eccentric system "Drillex" |
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 The
"Drillex" system is recommended when overburdens situation
must be solved. When using the "Drillex" system, casing
the hole is simultaneous with the drilling operation.
"Drillex" is capable of drilling in formations such as
tough overbudens, gravel, sand incoherent rocks, boulders and clay.
The "Drillex" system features:
- a guide device to fit all popular brands of Down Hole hammers
- a reamer that pivots around an offset shaft on the pilot bit
and creates a hole larger than the casing diameter
- a pilot bit
When the hole has been drilled and cased, the reamer is closed
by reversing the direction of rotation in a single turn. The reamer
and pilot bit can now be retracted from the cased hole.
Model |
O.D. Casing |
Pilot Bit Diameter |
Reamer Diameter |
Hammer size |
Drillex 4 |
4.5" - 115 mm. |
3.54" - 90 mm. |
4.85" - 123 mm. |
3" |
Drillex 5 |
5.56" - 141,3 mm. |
4.53" - 115 mm. |
5.95" - 151 mm. |
4" |
Drillex 6 |
6.625" - 168,3 mm. |
5.5" - 140 mm. |
7.44" - 189 mm. |
5" |
Drillex 7 |
7.625" - 193,7 mm. |
6.52" - 165 mm. |
8.32" - 211 mm. |
6" |
Drillex 8 |
8.625" - 219,0 mm. |
7.51" - 190 mm. |
9.30" - 236 mm. |
6" |
Drillex 10 |
10.75" - 273,0 mm. |
9.48" - 240 mm. |
12.125" - 308 mm. |
8" |
It is recommended to employ seamless steel
casing welded or left hand flush joint threads of 1/4"
(6.3mm.) thickness
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