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A well in household plots belongs to the category of the most common ways of organizing an autonomous water supply system. Pumping a well is an important technological operation, the completion of which determines its output at the calculated debit. To carry out such work in compliance with all technological nuances is quite possible on their own.
What is pumping for?
To get the cleanest water possible, it is necessary to pump the well after drilling. In addition, this procedure is necessary due to the fact that during operation of a water well, siltation of its bottom and clogging of installed filters are certainly observed, as a result of which the debit of the source decreases, and the water inflow will inevitably decrease. Siltation is the result of a filter’s inability to capture tiny silty particles.
Besides, the well is contaminated as a result of particles of debris from the surface. At some stages of operation, pumping is necessary, first of all, to clean the barrel of sludge and clay mud. With a decrease in water inflow, as well as at the first signs of deterioration in its quality, it is necessary to clean the source of water intake, which may consist in washing, purging, or pumping.
Types of pumping
Often, wells become the only possible source of water for owners of cottages, private houses or country cottages. If the water in it is of low purity and contaminated with particles of sand, clay or earth, then without pumping it is not recommended to use water from such a water source.
Pumping after drilling
After the drilling is completed, it is necessary to pump it, which allows you to get rid of siltation and dirt, as well as prepare the water for consumption. Immediately after drilling, especially using the backwash method, which implies that a mud is supplied during drilling to strengthen the walls of the well and cool the drilling tool, a pulp appears.
Pulp is a suspension of sand, clay and earth in water. The purpose of cleaning is to pump it out and remove any fine solid grains of sand that penetrate through the filter mesh from the area of the filtration cone. Proper pumping makes it possible to get crystal clear water. The work will have to be carried out regularly, especially in the cold season.
Pumping after winter
For a drilled well, siltation and sanding of the bottom filter is a constant threat. Long downtimes are often accompanied by a decrease in water content and a deterioration in the quality of the water produced. If the system is suspended for the entire winter period, restoration of water intake can be facilitated by preparing the structure for harsh winter conditions.
If the operation of water supply in the winter is not planned, it is preferable to equip the equipment with a heating cable. In addition, despite the fact that high-quality equipment is not subject to any violations, it is recommended to leave the pumping equipment in the bottom.
Well pumping in winter
If the use of water supply in winter is excluded, it is advisable to remove pumping equipment from it. In winter, periodically lower it into the well and turn on the pump. The soil frozen around it does not fall apart so easily, so the walls of the well will be much stronger.
|Name of pumping||Technology features||Step-by-step instruction|
|After drilling||Only after pumping can the well be connected to the water supply system||For work, an electric pump, cuff, airlift, filter pipes and gravel are needed. Progress:|
The process continues until clean water with good organoleptic characteristics
|In spring||This procedure is preventive and contributes to the improvement of the water source, and also increases its life||It is best to use a submersible centrifugal pump. Progress:|
Work is carried out until clean water emerges from the pump, without signs of siltation or sandy sediment.
|In winter||It is especially important to carry out the correct pumping in the winter period, since in the summer such a process is very often natural and accompanies the use of large volumes of water for irrigation and other household needs||In winter, with minimal use, pumping should be carried out periodically. Progress:|
About 30 minutes of pump operation in winter will significantly extend the life of the well
Shallow springs in sandy soil are washed for 12-48 hours. For deep in clay soil or limestone, it is necessary to pump for several weeks or months.
There are two main options for pumping - internal and external. The first method is to rinse the pores of the walls for deeper cleaning. External pumping involves the removal of clay peel from the surface of the walls with subsequent pumping. It is recommended to initially carry out external pumping, and only then internal.
Pumping can be carried out:
- hydromechanical method;
- chemical way;
- in a physical way.
In addition, various equipment may be involved.
How to pump a well
The compressor should have a capacity of about 12 atmospheres. Smaller than the diameter of the well, the pipes should be connected to each other with high quality, and then inserted into the well to the bottom. Compressor is driven into it under high pressure ordinary air.
A vacuum adapter should be mounted on the pipe and fixed with self-tapping screws. The compressor hose is attached to the adapter. The procedure should be repeated several times. A water compressor drives water into the well at maximum pressure. The source is cleaned until the container is completely drained, after which the washing is repeated until the dirt no longer leaves the annulus.
Airlift is a special pump, through which it is possible to quickly and efficiently pump the well. When pumping an aquifer through an airlift, the water flow rate is several times higher than the speed indicators observed during cleaning by means of a centrifugal or piston pump.
This method is very simple and based on the law of Archimedes. It is necessary to place a tube into the well with a tube fixed at the lower end and used to supply compressed air. After turning on the compressor, the structure is cleaned with foam and water. The main condition is the continuity of water supply.
A more accurate way to clean is to use a submersible pump or a standard pump. Most often, a recently drilled source is pumped in this way.
The pump, which is designed to pump water with a significant amount of contaminants and mechanical components, is subject to use. This method is considered the safest.but has the least efficiency and consists in running water through a submerged pump.
After reading the corresponding article on our website, you can learn about how to make a bailer for the well with your own hands.
The pumping procedure may be accompanied by several organizational errors that have a negative impact on the efficiency of the process.
The main and most likely errors during pumping are as follows:
- too low immersion of the pump, which is accompanied by very fast clogging of the equipment with sludge or irrevocably tightening the pump into quicksand;
- too high suspension of the pump promotes pumping of water only in the upper part of the casing, while the main deposits of sludge remain at the very bottom;
- ill-conceived and disorganized discharge of pumped water causes the sediment to penetrate back into the aquifer or to erode the surrounding soil.
When pumping, water should be drained a considerable distance from the head of the well. Proper use of the equipment used will not only allow you to perform the procedure efficiently, but also reduce the number of necessary pumping over a long time.
The causes of siltation are quite diverse, but most often this process is caused by the removal of insoluble fine granular particles, as well as fine dispersed clay suspensions and rust flakes. Signs of siltation of a well are the appearance of noticeable impurities in water, as well as a change in its organoleptic properties, including taste and smell.
Artesian wells drilled in such a hard rock as limestone are not silted in principle. Aquiferous limestones do not clog water with small particles and, having a porous structure, serve as a high-quality natural filter. Wells on limestone have been working without siltation for decades, and their performance does not depend on the frequency and quality of pumping.
Currently, there are five most common methods for cleaning a well from siltation, among which the removal of sludge from the bottom using special equipment, the use of a vibration pump or airlift, as well as the use of the chipper method.
Pumping and cleaning a well with a compressor
Pumping a well is a rather lengthy and very time-consuming process. Pumping is necessary when there is pollution of the water supply system. For unprofessional, independent work, inexpensive models of submersible pumps are excellent. After such a procedure, clean water should go, which means that the contaminants from the well have been completely removed, and the water quality has become much higher.