Changes

除泥-亚洲除泥法

147 bytes removed, 04:13, 15 November 2015
适宜条件
{| border="1" cellpadding="5" cellspacing="0" align="center"
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! width="50%" style="background:#efefef;" | Advantages优势! style="background:#f0f8ff;" | Disadvantages劣势
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| valign="top" | - Easy to handle and a temporary casing is normally not needed. It is possible to construct the drilling equipment locally.操作简单,通常无需使用临时套管。可以在当地制作钻井设备。<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.比螺旋钻取或冲击钻取速度更快,因为钻杆在钻取过程中可轻易拉长,并且也无需从井眼中移除。| valign="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.由于水压作用,井眼不会闭合。为了防止塌陷,必须在钻井和修建过程中保证井眼中充满水。<br>
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===Construction, operations and maintenance===
81
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