Impact of Red Clay’s Expansive-Shrinkage on Water Well Drills and Countermeasures

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The swelling-shrinking property of red clay poses challenges to water well drilling rig:

 

  1. Swelling Risks
    • When wet, red clay expands, increasing soil pressure around the borehole.
    • Poor control of mud fluid loss causes water seepage, triggering expansion and potential collapse.
  2. Shrinking Risks
    • Drying causes red clay to crack, destabilizing the borehole wall.
    • Cracks lead to mud loss, reducing wall protection effectiveness.

 

Countermeasures:

 

  1. Drill Selection
    • Prefer low-disturbance drills like hydraulic power head models.
    • Their smooth operation minimizes disruption to red clay.
  2. Mud Parameter Control
    • Strictly manage mud fluid loss to form a dense mud cake.
    • Prevent excessive water penetration into red clay layers.
  3. Emergency Fixes
    • Throw clay balls into the hole to reinforce the wall if swelling/shrinking occurs.
    • Adjust mud properties to enhance wall protection capacity.

 

These measures effectively reduce the impact of red clay swelling-shrinking on drilling operations.water well drilling rigBx-300S-Type-Circulation-Expansion-Slide-Bar-Water-Well-Drilling-Rig