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止水是钻孔水文工作的关键之一,它的好坏直接影响水文地质资料的正确与否。一年多来,各队在这方面除了用过去比较有效的老办法外,还试用了一些新的办法。介绍如下:一、套管隔水:用套管隔水分三种情况:
Water stoppage is one of the keys to the drilling hydrology work. Its quality directly affects the correctness of hydrogeological data. Over the past year or so, the teams have tried new methods in addition to using the old methods that were more effective in the past. Introduce as follows: First, the casing water: Use the casing to separate three kinds of water: