In water well drilling rig operations,
bit types vary greatly in soft soil adaptability.
Beyond scraper bits:
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Tipped roller bits suit clay with small gravel. Their alloy teeth reduce clay adhesion.
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Spiral blade bits perform well in loam. Spiral structures cut and remove cuttings together.
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Choose using soil samples:
Large-open scrapers for pure clay;
side-edged composites for clay-sand mix.
Keep 2-3 bit types on site. Size bits 5-10mm larger than design to prevent shrinkage. Water well drilling rigs maintain efficiency with flexible changes.
