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Underflowdrilling
Underflowdrilling is a drilling system developed by GWTR, with which
well filters can be placed manually trough a casing, samples can be
taken with coring samplers or by hand. The speed, high quality and the
positioning of the well filters make this an unique drilling system. It
is possible to position well filters and take soil-samples up to 20
metres deep. A big advantage of underflowdrilling is that little or no
water is used and a limited amount of soil is released. The well filters
can be finished in the casing with betonite, so that no leaks can occur from one layer to the other.
Underflow
With the use of underflow it is possible
to revitalize wells. In contrary to traditional methods where the
blockage gets pushed away, underflow removes the blockage. This can
result in reuse of a well instead of having to replace it.
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