SU850819A1 - Device for treating the filter and near-filter zone of water well - Google Patents

Description

(54) DEVICE FOR FILTER TREATMENT AND WATER BODY ZONE TO WATER

I

The invention relates to the operation of groundwater intake, vertical drainage to protect areas from underflooding, in particular, to devices for combined pulse-reagent filter processing and filtering zones of water wells when they are clogged with sediments of chemical origin.

A device for treating well filters to water is known, which includes a cylindrical housing with a conical notch, inside which are located positive electrodes connected by a coaxial cable to a pulse current generator and having a central channel for supplying gas bubbles to the discharge zone. The negative electrode is the filter tube 1.

A disadvantage of such a device is the possibility of damage to the water intake surface due to electrical erosion when using the filter tube as a negative electrode.

A device for processing filters and the filter zone of wells in water is known, with the filter part being filled with a reagent solution adopted as a prototype.

including coaxially oriented electrodes installed in a common case and connected via a coaxial cable to a pulse current generator 2.

A disadvantage of the known device is the low processing efficiency,

This is due to the fact that during electrical discharge in the reagent solution, breakdown of the effective interelectrode gap is not possible due to the high electrical conductivity of the reagent. The pressure on the front, Q those of shock waves arising during discharge of not completed problems, is insignificant and does not ensure the destruction of the clogging.

The purpose of the invention is to increase the processing efficiency.

15

This goal is achieved by the fact that the device is equipped with a sealed chamber in which electrodes are placed, filled with liquid of low conductivity and made of insulating material.

The drawing shows the scheme of the proposed device for filter processing and the filter zone of the well for water.

The device consists of an upper 1 and lower 2 flanges rigidly interconnected by studs 3. In the upper flange 1, the end of the coaxial cable 4 is closed, the central core 5 of which is the positive electrode 6. The negative electrode 7 is represented by a protrusion on the lower flange 2.

Coaxially oriented electrodes are placed in an airtight chamber 8, the walls of which are made, for example, of polyethylene or rubber. Sealing chamber 8 is achieved by sealing rings 9 and gland sealing 10.

A liquid with a low electrical conductivity is poured into the hermetic chamber 8 through an opening 11 in the lower flange 2, which is closed by a bolt 12.

The device works as follows.

Initially, a reagent-solvent of clogging sediments, such as hydrochloric acid, is poured into the wellbore. The device on cable 4 is lowered into the filter zone and high voltage pulses from a mobile generator of pulse currents located on the surface are applied to the positive electrode 6.

During the breakdown of the interelectrode gap in a liquid with low electrical conductivity, filling the hermetic chamber 8, an intense shock wave is formed that travels through the wall of chamber 8 and with a amplitude reduced by 10-20 / o, destroying it.

Destruction and crushing of the comatant significantly intensify the process of its

dissolution, which increases the efficiency of processing filters and filter zones wells in the water.

The proposed device provides an increase in processing efficiency by a factor of 1.5 due to an increase in pressure at the shock wave front due to electrical breakdown of a fluid with low conductivity, isolated from the reagent solution by a sealed chamber.

Claims (2)

Invention Formula A device for processing the filter and near-filter well zone to water from filling the filter part with a reagent solution, including flanges and electrodes coaxially mounted between them, characterized in that, in order to increase processing efficiency, the device is equipped with a sealed chamber filled with a low conductivity liquid and made of an insulating material in which electrodes are placed. Sources of information taken into account in the examination 1 Romanenko V. А. Electric gaps with an artificial conduction channel for electro-hydraulic cleaning of filters of single-hole wells. Electron processing of metals, Chisinau, 1979, No. 2, p. 84-86. 2. Recommendations on impulse methods for restoring the productivity of water wells. M., VNIIVODGEO, 1979, p. 46 (prototype).