Difference between revisions of "Groundwater - Stone hammer well drilling"

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| valign="top" | Significantly cheaper than piston pumps.<br>
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| valign="top" | Cheaper and easyer to maintain than motorized drilling rigs.<br>
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Easy to maintain.<br>
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Drill in very hard soil<br>
 
Easy to train on maintenance.
 
Easy to train on maintenance.
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Revision as of 13:37, 28 July 2007

File:Stone hammer well drilling icon.png

The previous drilling methods are not suitable for hard soil formations, so ongoing development led to the Stone-hammer. This method consists of a heavy hammer hitting directly on a hollow drill-head. Although it does not penetrate very hard stone such as basalt, it is a tougher option than the Rota-sludge method. This technology is being refined further in India and Nicaragua.

The Stone-hammer method has won a competition for innovative irrigation technologies organized by the World Bank, Winrock and IDE (International Development Enterprises).

The Stone-hammer in India, drilling a 20 m deep well in a stony layer
Advantages Disadvantages
Cheaper and easyer to maintain than motorized drilling rigs.

Drill in very hard soil
Easy to train on maintenance.

Slower than motorized drilling rigs.


Capacity

40 litres / min from 10 meters depth.

Costs

  • US$ 20-120 depending on model.

Applying conditions

  • Numbers: 50,000 in Nicaragua, 20,000 in Mexico, Honduras, Guatemala, Ghana, Zimbabwe, Tanaznia, Senegal.
  • Range of depth: 1-35 meter (60 m with two cranks).
  • Application Communal wells, houshold, irrigation.
  • Cost of introduction: US$ 10,000-20,000 per project, including 20 pumps, engineering and hands-on training. US$ 60,000-100,000 per project, including 1,000 pumps, production workshop and hands-on training.

Rope pump building manual

PRACTICA foundation and the Technical Training Programme of the ETC Foundation (TTP/ETC) have put together a really excellent manual on how to build rope pumps (PDF, 2.5 Mbyte). It is an 86 page long document with detailed instructions.

External links

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