| 摘要 |
An improved method for cleaning a water well by creating a pulsating action at the lower inlet end of the well casing. The well casing is sealed to form a generally airtight enclosure. A water level sensing probe is placed within and extends generally throughout the casing. A vacuum is formed in the well casing by pumping the air therefrom which raises the water column within the casing to a predetermined height. The water level sensing probe signals the height of the water column as it rises within the casing. The vacuum is destroyed upon the water column reaching a predetermined height and the weight of the descending water column forces the water outwardly through the casing openings and into the surrounding strata. The raising and lowering of the water column by creating and destroying a vacuum is repeated, causing an incoming and outgoing surging action of water at the lower end of the casing to remove material blocking the inlet openings and to rearrange the bed of gravel and sand surrounding the openings. The apparatus for carrying out the cleaning operation is relatively lightweight and portable and includes an electrical vacuum-producing pump, an electrical water level sensing probe and indicating lights for the probe, and a dc voltage system for the probe and for applying an electrical charge to the casing to assist in the destruction of the encrustations at the bottom of the casing by creating an electrolytic action.
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