The methods for water well drilling RIGS to deal with rock fragmentation in fracture zones

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To address rock fragmentation in fractured zones, water well drilling rig need multiple countermeasures. On one hand, apply suitable hole-wall protection technologies like mud mud protection and casing casing protection. Mud protection forms a mud cake on the borehole wall to prevent rock falls and stabilize the wall, while casing protection inserts casing into the hole to isolate fragmented rocks.

 

On the other hand, improve drilling methods by using impact-rotary drilling. This breaks rocks with impact force to reduce disturbance to the borehole wall. Additionally, optimize bit structure by adding gauge protection devices to prevent borehole shrinkage and ensure smooth drilling.

Key approaches:

 

  1. Use mud or casing protection to stabilize fractured borehole walls.
  2. Adopt impact-rotary drilling to minimize wall disturbance during rock breaking.
  3. Enhance bit design with gauge protectors to avoid borehole diameter reduction.water well drilling rig