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Sludging - Rota sludge

2 bytes removed, 05:21, 17 January 2013
→‎Suitable conditions
==Suitable conditions==
Suitable for unconsolidated formations: Sand, silt and clay. Because of the rotation and the drill bit, it is possible to penetrate softer-consolidated formations such as stiff clays, soft sandstone, and weathered laterite.
 
The Rota Sludge method can be used to drill 2-5 inch wells up to 20 m deep.
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- If cow dung is used as drilling fluid, this can cause contamination of the well, which can take several weeks to disappear.
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