河北省黑龙港地区地下水水质，在垂直方向上的变化为淡、咸、淡或咸淡，在个别地段还出现全咸区。在水平方向上的规律是从西向东，咸水体的厚度逐渐增大，咸水的程度也逐渐增加。因此，在机井施工和使用过程中，由于违反操作规程、井管接口不严、泵头碰坏井管、粘土球封闭的厚 The quality of groundwater in Heilonggang area of ​​Hebei Province is light, salty, light or brackish in the vertical direction. In some areas, the whole salty area also appears. The law in the horizontal direction is from west to east, the thickness of salt water body gradually increases, and the degree of salt water also increases gradually. Therefore, during the construction and use of the shaft, due to violation of operating procedures, the interface of the well pipe is not strict, and the pump head touches the well pipe, and the thickness of the clay ball is closed