Wear and Response of coal seam intercalated gangue layers on the drilling tools of water well drilling RIGS

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Coal seams often contain hard interbedded layers like sandstone and shale, causing severe wear on water well drilling rig tools.

 

  1. When bits break through interbedded layers, cutting teeth bear huge impact, prone to chipping and wear.
  2. Friction between drill pipes and interbedded layers causes surface scratches, wall thinning, and strength reduction.

To address interbed wear:
3. Choose wear-resistant tool materials, such as cemented carbide bits and high-strength alloy drill pipes.
4. Optimize drilling techniques: reduce rotation speed and increase WOB when encountering interbedded layers to minimize bit impact.
5. Regularly inspect tool wear and replace severely worn parts promptly to avoid construction delays and safety risks from damaged tools.water well drilling rig