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Percussion - Stone hammer

1 byte removed, 02:50, 17 July 2012

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- It is slower than machine drilled wells.

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[[Image:Stone hammer drilling in action.jpg|thumb|right|250px|Stone hammer drilling in action]]

[[Image:Emptying the drill bit.jpg|thumb|right|250px|Emptying the drill bit]]

[[Image:percussion gouge.jpg|thumb|right|250px|percussion gouge]]

 

Compared to hand-dug wells, the Stone Hammer has the following advantages:

* Some 40 % cheaper ( $600 versus $1000 for a 20 meter well).

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