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During double-head drilling with hydraulic hammer drills, both drill strings are bored into the ground in opposing directions. For this purpose, a dual head drilling system is used. The drilling waste is conveyed upwards by a flushing medium in the annulus space between the outer and inner tube.
This drilling process makes it possible for the outer protective tubing to be only partly positioned.
EMDE offers the following components for double head drilling and hammer drills:
This drilling method will be used mainly in varying soil conditions and groundwater under pressure.