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[[Image:Rota_sludge_well_drilling_icon.png|right]]
[[Image:Rota_sludge_well_drilling.PNG|thumb|right|150px|Drilling a 20 m deep well in Chinandega, Nicaragua, with the Rota-sludge method ]]
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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.
==History and social context==
==Suitable conditions ==
{{procontable | pro=
- Can drill in hard soil <br>
| con=
}}
==Technical specification==
====Operation====
====Maintenance====
====Manufacturing ====
== Capacity ==
2-5 inch wells to 20 meter.
== Costs of wells ==In India, the cost of a well made with Rota-sludge is about US$ 30.In Nicaragua, this varies from US$ 80 to US$ 400.
The cost of introduction varies between US$ 30 India.US$ 805,000-20,000 per project, including hand-400 Nicaraguaon training, drill set and drilling of test wells.
== Applying conditions ==
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