Borehole Wall Stability Control Technologies in Expansive Soil Drilling-Water Well Drilling Rig

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Based on the fissure development characteristics of expansive soils, water well drilling rig.borehole wall stability requires dual measures of “anti-swelling + anti-shrinkage”:

 

  1. Chemical borehole protection:
    Inject sodium silicate solution (modulus 3.2) to react with clay and form a waterproof film.
  2. Physical support:
    Use double-layer casings (outer protective casing + inner screen pipe), filling expansion water-stop strips in the gap.
  3. Humidity control:
    Circulate low-temperature mud (10–15℃) in the hole to reduce water migration.water well drilling rigBx-300S-Type-Circulation-Expansion-Slide-Bar-Water-Well-Drilling-Rig