Application of Water Well Drilling Rigs in Coarse Sand Strata

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A water well drilling rig faces challenges in coarse sand—large grains, high porosity, poor stability.

 

  1. Impact rigs’ role: Impact rigs stand out here. Cable tool rigs lift bits high, then drop them to crush coarse sand, forming holes.
  2. Key operations: Use high-viscosity mud to prevent loss in permeable coarse sand. Adjust impact frequency—lower for hard layers, higher for efficiency.
  3. Pros and fits: Slow but simple, low-cost. Ideal for shallow coarse sand wells, offering good value.

The water well rig, especially impact types, works effectively in coarse sand. Choosing such a water well drilling rig aids success.