SU901422A1 - Filter for water intake boreholes - Google Patents

Description

The invention relates to the production of groundwater from wells and can be used in whole or flushed mud; of military water supply as well as of the front-line or melio-ratianized water downfall

A filter is known that contains a perforated frame, a filter casing and a jetting nozzle installed at the bottom of the filter l.

The core of this design is that its area of application is limited to small wells with filters planted in fluff in loose rocks, where it is used for landing using the method of mine.

The closest in purpose and technical nature to the proposed. is a filter to restore the well water supply and containing a perforated frame, a filter casing, a nozzle with a valve, a pressurized pipe with a seal and a sleeve 2.

The disadvantage of this design is the slight depth of erosion and the removal of sand from the old filter, as well as the ineffective destruction of chemical collegulation zones. -.

The purpose of the invention is improved processing efficiency of the filter and the filter zone of the well, both during its development and during operation.

The goal is achieved by

that the fi.ltr is equipped with ring-centralizers installed along the height of the frame and fitted with

10 along its perimeter with jetting nozzles with non-return valves.

The nozzles themselves are displaced horizontally and directed along the radius.

nozzles are tangential to the surface of the filter.

15

FIG. schematically shows the design of the filter; Figures 2 and 3 of the embodiment of the ring-centralizers with jetting nozzles.

Jet nozzles can be

20 are arranged with some horizontal displacement, a part tangential to the surface of the filter.

The filter consists of a perforated frame 1, equipped with multi-colored ring-centralizers 2, around the perimeter of which are jetting nozzles 3 with non-return valves 4. Between deaf rings 2 there is a filter sheath 5. In

Claims (2)

30 of the lower part of the filter is equipped with a coius nozzle 6 with a jetting nozzle 7, a check valve 8 and a coupling 9 with a left-hand thread. The discharge pipe 10 from pack 11 and 12 is missing inside the filter. The distance between the packers is somewhat less than the height of the blind ring. The total of the area of the deaf rings should not exceed 0.2 of the total area of the filter frame. The filter for water wells works as follows. The injection pipeline 50 supplies water that passes through valve 8, blurs the collar zone or sand in the well with the help of a jetting nozzle 7 and, over the loft, brings them to the surface. Prn this packers 11 and. 12 -acs in the deaf bottom of the filter. At the end of the filter landing, the injection pipe 10 is rotated to the right, it is disconnected from the conical tip b at the Ghineia soybean with coupling 9, the packers 11 and 12 are raised in the interval of the lower ring with jetting nozzles and the ball is thrown inside the pressure pipe 10 him When water is supplied to the pipeline 10, it passes between the packers 11 and 12 and is injected into the reservoir either through the openings of the casing 1 and the filter cover 5 or through the jetting nozzles. In either case, the surface is treated fi 1τr and the filter is simple pajiCTBa. But the most effective destruction of the zones of clogging in the filter zone occurs when the hydraulic nozzles 3 are working. The location of the packers 11 and 12 in the zone of the deaf rings 2 is controlled by a sharp increase in pressure at the flushing pump. By sequentially moving the packers up, the entire filter is processed, after which the discharge pipe is removed to the surface. During operation, such a filter design allows periodic processing of the filter surface and filter zone using a pressure pipe with packers. Thus, the filter of the proposed design can be used for planting using a hydraulic module in a newly built well, restoring chemically or mechanically clogged operating wells, restoring broken and sandy wells. The application of the proposed filter in water wells allows to dramatically reduce the time of completion of wells, to restore chemically or mechanically kolmat and zapsedkovany wells. The introduction of jetting nozzles beyond the filtering surface makes it possible to increase the depth of destruction of the borehole walls in the aquifer interval by about an order of magnitude, and also creates conditions for the formation of a layer of coarse-grained sand fractions in the aquifer around the filter, since fine-grained fractions are carried to the surface , and coarse-grained settle in the annular space. Claim 1. Filter for water intake: wells, consisting of a perforated frame, filter sheath, valve head, discharge pipe with seal, and coupling, are distinguished by the fact that, in order to increase the filter processing efficiency and the filtering zone of the well as during its development, and during operation, the filter is equipped with ring-centralizers installed along the height of the frame and equipped with jetting nozzles located around its perimeter with check valves. 2. The filter according to claim 1, characterized in that the nozzles are displaced horizontally and directed along the radius, 3. Filter pop, 2, characterized in that the nozzles are placed tangentially to the surface of the filter. Sources of information taken into consideration in the examination 1.M.G. Onoprienko. Drilling and equipment of hydrogeological wells, Nedra, Moscow, 1978. 2. Authors. USSR certificate, tf 380802, cl. Е 03 В 3/18, published. 05/15/73 (prototype). ten one 3 eleven 12 g five % 6 7 (rig 2