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How does the drilling with Wassara technology influence the quality of the borehole wall for this important succeeding grouting procedure?


Drilling with Wassara results in clean holes (especially compared to drilling with air-powered equipment), ensuring high quality in the following grouting procedure allowing the cement grout to reach longer into the cavities. This is due to the low up-hole water velocity that minimises borehole erosion. The good borehole wall surface is also optimal for usage of packers.