Formation Fit: Short vs. Long Stroke DTH Hammers for Water Well Drilling Rigs

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The water well drilling rig DTH hammer stroke length affects formation adaptability.​
  1. Short stroke (30-50المليمتر): High frequency (1600-2000/min) suits hard rock. Saves 25% energy in granite, wears bits evenly.​
  1. Long stroke (50-80المليمتر): High impact energy (>300J) fits fractured strata. 30% faster in sandstone-shale layers.​
  1. Match to hardness: Short for hard rock, long for soft/fractured. Wrong choice cuts efficiency by over 40%.​
A hill project saw 5% jamming with long stroke, vs. 20% with short. The water well drilling rig relies on right stroke selection.