Device for removing debris from a drillhole

Details Device for removing debris from a drillhole Device for removing debris from a drillhole

1991-09-27

1992-09-01

Britts, Ramon S.

Boring or penetrating the earth

With below-ground tool drive prime mover

Discharge passage for motive fluid directed toward bore...

175296, 175324, E21B 400

Patent

active

051431629

ABSTRACT:
A device for use adjacent to a down-the-hole percussive drillhead, for removing debris from a drillhole, includes a separator for removing water and other matter from the percussive fluid prior to the percussive fluid entering the drillhead. The water and other matter are ejected into the drillhole to remove the debris, and the separator includes a one-way flow valve to prevent backflow of debris and water into the drillhead during periods when the percussive fluid flow ceases.

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