In country houses, a well is almost the only way to provide housing for water. But if you compare them with the central water supply, in the case of wells, the owners themselves have to take care of the quality of the water. Sometimes the liquid becomes cloudy there, and sand settles at the bottom. This suggests that it is necessary to flush the well.
Using a submersible pump
A more accurate way to clean is the technology when using a submersible pump. You don’t have to work in the mud, because the water can be drained to a convenient place. For the procedure, you will need a pump for pumping dirty water. It must be able to absorb solid particles up to 5 mm. Then it will be possible to remove not only sand from the bottom, but also small-fraction pebbles.
Methodology
Flushing the well begins by tying the pump to the cable. During operation, equipment may suck in sludge. A cord is supplied with the unit, which does not always help to pull out the device. The unit sinks to the bottom and rises twice to raise sediment. Then the pump is installed near the bottom and turns on.
If the unit provides for the availability of automation, it will turn itself off as soon as all the water is pumped out. In the absence of such an option, it will be necessary to control the entire process in order to understand when the pumpdown will end, because a dry engine can burn out. Flushing the well in the absence of a dirty water pump can be carried out with a vibration pump of the “Kid” type. Manipulations will be the same as described above.
Flush calculation
The flow rate of the flushing fluid should be determined taking into account the removal of sludge in the gap between the well and the pipes. The pump is selected according to the largest pressure loss in the system. The volume of fluid flow, which is indicated by the letter Q, will be determined by the formula: Q = P / 4 * (D 2 - - d 2 ) * W kn {m 3 / s}. In it, the letter D denotes the diameter of the wellbore. The letter d in the formula indicates the diameter of the drill pipe. W KP - the fluid flow rate in the annular gap.
This flow rate must satisfy certain requirements. For example, the hydrodynamic pressure should be less in comparison with the hydraulic fracturing pressure. But when drilling rocks, which are prone to talus and collapses, it is necessary to ensure a laminar regime in this interval.
After calculating the flushing of the well, the amount of fluid flow should be clarified when choosing a type of hydraulic downhole motor and a turbogenerator system. In this case, the conditions for cleaning and preventing the absorption of fluid by the rock formation should be fulfilled.
Cleaning
Flushing the well after drilling is necessary for the reason that debris, in addition to water, also gets inside. Installed filters are not able to trap small particles that make the water cloudy. To flush the well with your own hands at the first stage, you need to insert pipes into the well. The top is attached with a rope, because under high pressure the structure can push out.
A vacuum adapter is put on the pipe and fastened with self-tapping screws. The compressor is pumped to the desired pressure. Put the compressor hose on the adapter and turn on the unit. All air is discharged into the well. This pumping should be repeated several times.
Chemical cleaning
If flushing and purging methods only slightly increased the debit of the well, the filters are clogged with layers of lime and iron salts. Knock them out pressure will not succeed. In this case, you can resort to the use of acids. Battery acid is used at the bottom, which is used for vehicles. Previously, the pump should pump out water.
Acid is left inside for two days, while the top of the well should be plugged. Such flushing of wells for water involves pumping water several times. Even after this, within a month, the liquid should not be used for drinking and cooking. It can only be used for household or construction needs. The more often you take water, the faster the acid is washed out. Before using water, it is necessary to submit it to the laboratory for analysis. This will give you an official safety confirmation.
Flushing with two pumps
This technology involves the immersion of one pump in the well using a cable. It is suspended 60 cm from deposits. A discharge hose is lowered into the tank, a second hose is lowered from the tank. A centrifugal pump No. 2 should be installed in the bucket and loaded into the tank.
With such a flushing of the well, the next stage involves two pumps at once. The hose in the well should be shaken in different directions to erode deposits. Such washing should be carried out until the water is clear. In this case, you should focus on a more powerful pump. It is stopped from time to time to maintain the optimum level of water in the tank.
Why you should use two pumps
This technique is good in that the flushing is better and faster. The submersible pump is less loaded. Around the well, the area is not contaminated, and the manipulations themselves do not require a large amount of water. But this method has its drawbacks. They are expressed in the constant presence of a person during washing. The operator must monitor the operation of the pumps and turn off the more powerful from time to time.
Finally
Owners of suburban real estate sooner or later face the need to drill wells on the site. It is impossible to organize a different water supply system. This event is responsible, but it is accompanied by the need to clean the well.