Now the shortage of water resources, well drilling construction technology has become an indispensable project, but due to the well drilling process, the need to deal with a variety of different geological environment, so in the process of well drilling construction of the filter pipe will inevitably fail, so how to improve the success rate of well drilling construction of the filter pipe,geological drill pipeSummarize some of their own views.

1) To study the local hydrogeological conditions in detail

Drilling wells to study topography and geomorphology. The topography and geomorphology conditions determine the recharge and discharge conditions of groundwater, control the weathering of rocks, and affect the abundance and depletion of groundwater. The reservoir construction should have a drainage area, and the drainage pipe drilling construction should also have a recharge area. The reason is the same. If the lithological conditions are the same, low-lying terrain or terrain conducive to water catchment is more likely to form wells, but some small plains and small depressions are often dominated by argillaceous rocks, which are easy to be weathered and denuded to form lowlands, but groundwater is not good.

2) Adopt scientific and reasonable well-forming technology

① The water filter pipe should be facing the aquifer. Once the two are misaligned, the water inflow resistance will be much larger, and the depth of drop will be increased. Therefore, geophysical exploration logging should be carried out before the pipe is lowered to accurately determine the aquifer position.

The opening rate of the filter pipe should be sufficient, no matter what kind of pipe opening rate should not be less than 10%, most of the cement pipes produced by the soil method are only 2%, and the water inlet resistance is very large, which is not allowed.

③ There should be cushion bars between the filter pipe and the filter screen. If there are no cushion bars, the filter screen will be tightly attached to the well pipe. Only the mesh facing the inlet hole can enter the water, which is easy to cause blockage and seriously affect the water output and service life of the well.

④ The mesh of the filter screen and the size of the gravel shall be adapted to the aquifer, otherwise, it will be either water blocking or muddy water causing the well.

⑤ Mud drilling is used for drilling of water filter pipe,geological drill pipeAs a reminder,Break the wall and change the slurry before going down the pipe.

3) Pumping test shall be carried out, and water pump shall be reasonably selected

Pumping test for well drilling of water filtration pipe can be carried out in combination with well washing. Before the end of well washing, the water output, static water level and dynamic water level of the pump shall be measured, and the unit water output, the larger possible water output and the suitable water distribution of the pump shall be calculated. At present, the vast majority of wells do not have the above data. They only know whether a few kilowatts of water pumps are enough to pump. They can only blindly select pumps. The pumps with high lift will be selected as deep as the wells are drilled, thus seriously wasting energy.