Sludging - Rota sludge

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File:Rota sludge well drilling icon.png

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.

Drilling a 20 m deep well in Chinandega, Nicaragua, with the Rota-sludge method

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

PRACTICA foundation and ETC Energy have put together a manual on the Rota Sludge & Stone Hammer drilling: Volume I Drilling Manual, Volume II Production Manual High quality manuals for roata-sludge drilling, well digging and other manual drilling and digging methods are available as well with Foundation Connect International (http://www.connectinternational.nl/english/smartmodules/smart-tec/wells-boreholes/handdrilling). They are for free for organizations that are a Connect International member (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 ]