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Sludging - Rota sludge

34 bytes removed, 00:11, 23 May 2015

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The borehole stays open by water pressure. Thickeners such as clay, bentonite or even cow dung are usually added to the water in order to prevent hole collapse and reduce loss of working water (drill fluid).

The Rota-Sludge was developed by the [http://www.practicafoundationpractica.nl/products/drilling-wells/ org Practica Foundation].

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