During the test and production of in-situ leaching of sandstone deposit, it is very difficult and complicated to exploit boreholes when confined waterhead of ore-bearing acquifer is quite low.
在砂岩矿床的地浸试验和生产中，含矿含水层地下水承压水头很低时，地浸钻孔的开拓难度很大且工艺复杂。
2
It is an effective method for improving test precision that the waterhead loss tests of hydropower station inlet section are performed by increasing discharge or raising reservoir water level.
同时采用加大流量法和提高库水位进行进水口段的水力损失试验，对提高试验精度是一个行之有效的方法。
3
A new horizontal well production technology without dismantling well head and pulling up string to find water and test is introduced which can decrease operating times and cost.