The water well drilling rig uses dry or wet DTH hammers, differing in cuttings removal.
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Dry hammers:
Use high-pressure air,
need little water.
Save 95%
water in northwest deserts, 200
L/well.
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Best for arid areas: Drilled 8 wells in desert with no surface water. 100% water quality, but needs dust control.
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Wet hammers: Use water + air. Cools bits, extends life 20%. Better in wet regions, needs 1 ton water/50m.
A southern project saw 15%
faster drilling in granite with wet hammers.
The water well drilling rig fits both to conditions.
