SU569700A1 - Device for cleaning screens from sand clogs - Google Patents

Description

. one

% The invention relates to drilling machinery E MOISSAT to find application in mining, for example, when mining mineswere used with the in-situ leaching method.

8 times the timeframe at monthframe months, the chests {underground) underwent casing and filters on large materials.

Weighing devices for washing the filters by lowering the water level in the column, are fed into the well with compressed air supplied through the inlet port to the column and followed by a quick outlet through the outlet port.

When displacing the solution from the column

Squeeze x1 B03Aj.-xoM to the reservoir and the filter will act increased pressure, and with the rapid release of air from the column will be a rapid flow of water through 4 schltr into the well. In these cases the column will receive the maximum load, which causes destruction (especially made of polymeric materials). In addition, the composition and position of the groom 2 is disturbed

that after the filter, which leads to a change in its filtration properties.

A device for the development of wells by the creation of instantaneous depressions on the reservoir. The device includes a working string of pipes, a coupling with valves, a packer and intake shank f2j

The known device has the same nedgbkkami. In addition, the use of the | | anic expandable packer in the layout of Epic columns can lead to the destruction of these columns. v,

The purpose of retesters is to protect the filter and the filter zone when they are cleaned from the destructive effect of scouring liquid.

This is achieved by the fact that a spring loaded valve is mounted on the upper flange of the hydraulic packer.

On 4ng. 1 shows j-CTpoucTBo during the period of compressed air flow into the column; on (| ig. 2m is the same, in the source of compressed supply from the column; on. 3 - node I | in Fig. 1.

Claims (2)

The filter cleaning device contains a working column 1 to the upper part of which are connected an inlet pipe with vectile 2 and an outlet pipe with a valve 3 In the lower part of column 1 a transferring pipe 4 with an inflatable hydraulic packer 5 is concentrically placed. Hti 1 and contains a spring-loaded valve 6.. The lower end of the nozzle 4 is equipped with a nozzle with a valve 7. The device operates as follows. To clean the sand plug 8, the device is lowered into the well until the nozzles of the nozzle 4 are placed on the sand plug 8 of the filter 9. Then compressed air is supplied through the valve 2 to the column ay. Under the action of air, the fluid in column 1 will be filled: through the holes 10 of the packer 5 and inflate it, thereby isolating the filter part of the well. When packer 5 completely decompresses the liquid, overcoming the resistance of the spring 11 of valve 6 of packer 5, goes into the above-packer zone of the well, increasing the level of fluid above packer 5. After the liquid is completely displaced from column 1 into the packer zone, the valve 2 is opened and columns 3 air. Due to the differential pressures in column 1 and in the supra-packer zone, the liquid from the packer 5 orifices 1O will flow out into column 1 and the oaker 5 will return to its initial state. At the same time, the liquid from the supra-hyperprotective zone | at 8 and through the nozzle with the valve 7, the nozzle 4 fills the crown, eroding the sand plug 8. At the same time, the fluid circulates in the well in a closed circle — the head nipple zone — the sand plug — the column without affecting The pumped out sediment is deposited between column 1 and nozzle 4. If the sand plug is 8 of considerable size, the cycle is repeated until the filter 9 is completely removed from the sand plug 8. The effectiveness of the proposed filter cleaning device from sand plugs is In that the device in wells equipped with non-metallic pipes and 4 "liters, pretends to protect the pipes from deformation during a sharp decrease in the level of liquid in the well, stabilize operation (} iltra without short-term pouring and pumping out in the well at the time of its cleaning , which will reduce the calmatics of the filter zone and preserve the mode of movement of the productive solution in the reservoir during underground leaching. Formula of the Invention A device for cleaning filters from sand plugs containing a working column with suction m nozzle, check valve imeyuishm and shdravlichesky packer mounted on vsasyvanmtsom pipe and communicated with NIN- of l and h and w o f e to the fact that, in order to protect -with filters. iii. cleaning of the destructive actions of the well fluid; a spring-loaded valve is installed on the upper flange of the hydraulic packer. Sources of information taken into account in the examination; 1. Authors certificate of the USSR. № 94О76, cl. E 21 B 41 / GS, 1951. 2. USSR Author's Certificate No. 4О8008, cl. E 21 B 43/18, 1970. -EES one Knot eleven