Special Drill Bits
One of the drill bits used to widen the diameter of the hole, especially in water well drilling, is the Hole Opener drill bit. This drill bit increases the diameter of water wells with an initial diameter of 12 1/2 inches, which are drilled with a DS12 hammer, to 17 1/2 inches using the same hammer.
DaggighSanat Company also offers a variety of rotary drill bits for large-size drilling.
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