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Percussion - Stone hammer

343 bytes added, 22:02, 1 May 2012
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{{procontable | pro=
- The Stone Hammer can be used in combination with other drilling tools when gravel or a hard layer is encountered. <br>- Stone hammer wells are cheaper to drill than machine drilled wells: due to input of local labour ($600 versus $1500).<br> - Stone hammer wells are much simpler, less maintenance problems (No “high-tech” parts like carburetor, gearbox etc.) compared to machine drilled wells.<br>
| con=
- It is difficult to remove the drill bit after it has been hammered into the formation. <br>
- The stone hammer is only successful when larger boulders are not encountered. <br>- It is slower than machine drilled wells.
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