Method and device for drilling a channel

Details Method and device for drilling a channel Method and device for drilling a channel

2003-12-05

2008-03-04

Bagnell, David (Department: 3672)

Boring or penetrating the earth

Enlargement of existing pilot throughbore requiring...

C175S062000, C405S154100

Reexamination Certificate

active

07337859

ABSTRACT:
In a drilling method for creating a channel leading from surrounding soil into a shaft which is separated from the soil by a wall, a channel is drilled through the soil from a starting pit in the direction of the shaft using a first drill head. The first drill head continues to drill in this direction in order to create a breach in the wall, and a second drill head is then used in the shaft to widen the breach in the wall by drilling in the opposite direction with the second drill head.

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