Akvouser
95
edits
Changes
m
no edit summary
The Rota-sludge method is an adaptation of the Indian hand sludge method. The hardened drill bit is turned 90 degrees during drilling thus chiselling the bottom of the hole. This technology can be used to drill 2-5 inch wells in layers with sand, clay, gravel, tuff stone or weathered rock.
[[Image:Rota_sludge_well_drilling.PNG|thumb|right|150px|[ Drilling a 20 m deep well in Chinandega, Nicaragua, with the Rota-sludge method. ]]
{| border="1" cellpadding="5" cellspacing="0" align="center"