Sludging - Rota sludge
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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.
| Advantages | Disadvantages/limitations |
|---|---|
| - Can drill in hard soil |
Capacity
2-5 inch wells to 20 meter.
Costs of wells
US$ 30 India. US$ 80-400 Nicaragua.
Applying conditions
Cost of introduction: Variable US$ 5,000-20,000 per project, including hand-on training, drill set and drilling of test wells.
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Rota Sludge Manual
- Rota-sludge and stone hammer drilling, Part 1, Drilling manual. Produced by PRACTICA Foundation and ETC Foundation.
- Rota-sludge and stone hammer drilling, Part 2, Production manual. Produced by PRACTICA Foundation and ETC Foundation.
- High quality manuals for Rota-sludge drilling, well digging and other manual drilling and digging methods are available as well from Connect International (http://www.connectinternational.nl/english/smartmodules/smart-tec/wells-boreholes/handdrilling). They are for free for organizations that are a member of Connect International (cost: 50 Euro; see: http://www.connectinternational.nl/files/membership.pdf).
Movie
- www.youtube.com/watch?v=U229vv-McNw
- nl.youtube.com/watch?v=MvebFHCjCvk Rota sludge drilling Madagascar January 2008
External links
- www.practicafoundation.nl
- General info on well drilling www.rwsn.org
- nl.youtube.com/watch?v=MvebFHCjCvk
- Organisation http://www.waterforallinternational www.waterforallinternational ]
