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Sludging - Asian sludge

174 bytes added, 03:14, 17 July 2012
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Sludging (with or without rotation) can be used up to depths of about 35 meters.
 {{procontable | proborder="1" cellpadding="5" cellspacing="0" align="center"|-! width="50%" style="background:#efefef;" | Advantages! style="background:#ffdead;" | Disadvantages|-| valign="top" | - Easy to handle and a temporary casing is normally not needed. It is possible to construct the drilling equipment locally.<br>
- Faster as augering or percussion, as the drilling pipe can be easily extended during the drilling process, and does not need to be removed from the borehole during the process.
| convalign= "top" | - The borehole stays open by water pressure. To prevent collapsing, fluid-drilled boreholes must be kept full of water during the entire drilling and well installation process.<br>}|}
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