Filtering device of water injection well

Abstract

The utility model relates to a filtering device of a water injection well, and belongs to the technical field of water injection well corollary equipment. The filtering device of the water injection well comprises a filtering tank body, a measuring manifold, a disperser and a water inlet pipe, a sleeve is arranged in the filtering tank body through a bracket; a grating plate is arranged at the lower end of the sleeve; a rotating shaft is arranged in the sleeve through a driving mechanism; the lower end of the rotating shaft penetrates through the grating plate and then is provided with stirring blades; one side of the sleeve is connected with a water outlet pipe; the upper end of the water outlet pipe extends out of the filtering tank body; and a disperser is arranged at the bottom of the filtering tank body. The filtering device of the water injection well is compact in structure and ingenious in design, solves the problem that a filter element of an existing filtering device needs to be replaced frequently, and is particularly suitable for filtering of the water injection well.

Description

Technical Field

[0001] The utility model relates to a filtering device for a water injection well, belonging to the technical field of supporting equipment for water injection wells. Background Art

[0002] In the field of oilfield water injection, the downhole water needs to be filtered by a filtering device before it can be put into use. The existing filtering devices, such as a water injection well head filter disclosed in the invention patent with application publication number CN108654153A, meet the use needs to a certain extent, but lack the backwashing function, which leads to the need to frequently replace the filter element and cause inconvenient maintenance. Therefore, it is necessary to develop a new filtering device to solve the above problems of the existing filters. Summary of the invention

[0003] The utility model aims to provide a filtering device for a water injection well with a compact structure and ingenious design to solve the problem that the filter element of the existing filtering device needs to be frequently replaced.

[0004] The technical solution of the utility model is:

[0005] A filtering device for a water injection well, comprising a filter tank body, a measuring manifold, a disperser and a water inlet pipe; characterized in that: a sleeve is installed inside the filter tank body through a bracket; a grille plate is installed at the lower end of the sleeve; a rotating shaft is installed inside the sleeve through a driving mechanism; a stirring blade is installed at the lower end of the rotating shaft after passing through the grille plate; a water outlet pipe is connected to one side of the sleeve; the upper end of the water outlet pipe extends to the outside of the filter tank body; a disperser is installed at the bottom of the filter tank body; one end of the disperser extends to the outside of the filter tank body and is connected to the water inlet pipe through the measuring manifold; the bottom end of the measuring manifold is connected to a backwash drain pipe and a backwash valve; and a backwash inlet pipe is installed at the top of the filter tank body.

[0006] The bottom of the filter tank body is provided with a pebble cushion layer; and filter fiber balls are placed above the pebble cushion layer.

[0007] The disperser includes a main dispersion pipe and a dispersion screen tube; the main dispersion pipe is installed at the bottom of the filter tank body; one end of the main dispersion pipe extends to the outer end of the filter tank body and is connected to the measuring manifold; multiple dispersion screen tubes are connected to both sides of the main dispersion pipe; the dispersion screen tube is connected to the inner wall of the filter tank body through a connecting rib plate.

[0008] The measuring manifold comprises an upper union assembly, a lower union assembly, a flexible joint and a measuring instrument; the water inlet pipe is connected with the upper union assembly; the upper union assembly is connected with the measuring instrument through the flexible joint; one end of the measuring instrument is connected with the lower union assembly.

[0009] The advantages of the utility model are:

[0010] The filtering device for the water injection well has a compact structure and ingenious design. After filtering the underground water of the water injection well through the filtering fiber balls, the cleaning work can be completed by backwashing, thereby solving the problem of frequent replacement of filter elements in existing filtering devices. The filtering device is particularly suitable for filtering water injection wells. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the measuring manifold of the utility model;

[0014] Figure 4 It is a structural schematic diagram of the disperser of the utility model.

[0015] In the figure: 1. Filter tank body; 2. Bracket; 3. Casing; 4. Grid plate; 5. Measuring instrument; 6. Rotating shaft; 7. Stirring blade; 8. Water outlet pipe; 9. Disperser; 10. Measuring manifold; 11. Water inlet pipe; 12. Backwash drain pipe; 13. Backwash valve; 14. Backwash water inlet pipe; 15. Pebble cushion; 16. Filter fiber ball; 17. Main dispersion pipe; 18. Dispersion screen tube; 19. Connecting rib plate; 20. Upper union assembly; 21. Lower union assembly; 22. Flexible joint. DETAILED DESCRIPTION

[0016] The filtration device of the water injection well includes a filtration tank body 1, a measuring manifold 10, a disperser 9 and a water inlet pipe 11 (see the attached manual). Figure 1 and 2 ).

[0017] The inside of the filter tank body 1 is equipped with a sleeve 3 through a bracket 2; the lower end of the sleeve 3 is equipped with a grid plate 4; the inside of the sleeve 3 is equipped with a rotating shaft 6 through a driving mechanism; the lower end of the rotating shaft 6 passes through the grid plate 4 and is equipped with a stirring blade 7 (see the attached manual Figure 2 ). During operation, the driving mechanism can drive the stirring blade 7 to rotate through the rotating shaft 6.

[0018] One side of the casing 3 is connected to a water outlet pipe 8; the upper end of the water outlet pipe 8 extends to the outside of the filter tank body 1. During operation, the filtered underground water in the filter tank body 1 will pass through the grid plate 4 and then be discharged through the water outlet pipe 8. The grid plate 4 has the function of blocking the filter fiber balls 16 inside the filter tank body 1 to prevent them from being discharged.

[0019] The bottom of the filter tank body 1 is provided with a pebble cushion layer 15; a filter fiber ball 16 is placed above the pebble cushion layer 15 (see the attached manual). Figure 2 ).

[0020] The bottom of the filter tank body 1 is equipped with a disperser 9 (see the attached manual Figure 2 The disperser 9 includes a main dispersion pipe 17 and a dispersion screen tube 18; the main dispersion pipe 17 is installed at the bottom of the filter tank body 1; one end of the main dispersion pipe 17 extends to the outer end of the filter tank body 1 and is connected to the measuring manifold 10; a plurality of dispersion screen tubes 18 are connected to both sides of the main dispersion pipe 17; the dispersion screen tube 18 is connected to the inner wall of the filter tank body 1 through a connecting rib plate 19 (see the attached manual). Figure 4 ).

[0021] The purpose of disposing the disperser 9 is to allow the underground water entering the main dispersion pipe 17 to be evenly dispersed into the interior of the filter tank body 1 through each dispersion screen tube 18 during operation, thereby avoiding the problem of uneven filtration when the underground water enters in a concentrated manner.

[0022] One end of the disperser 9 extends to the outside of the filter tank body 1 and is connected to the water inlet pipe 11 through the measuring manifold 10 (see the attached manual). Figure 1 The measuring manifold 10 includes an upper union assembly 20, a lower union assembly 21, a flexible joint 22 and a measuring instrument 5 (see the attached manual). Figure 3 ).

[0023] The water inlet pipe 11 is connected to an upper union assembly 20; the upper union assembly 20 is connected to a measuring instrument 5 through a flexible joint 22; one end of the measuring instrument 5 is connected to a lower union assembly 21. Since there are many impurities in the underground water, the measuring instrument 5 needs to be replaced regularly to ensure the accuracy of the measurement. Therefore, after the flexible joint 22 is provided in the measuring manifold 10, the measuring instrument 5 can be easily installed.

[0024] The bottom end of the measuring manifold 10 is connected with a backwash drain pipe 12 and a backwash valve 13 ; the top end of the filter tank body 1 is provided with a backwash water inlet pipe 14 .

[0025] When the filtering device of the water injection well is working, the underground water enters the disperser 9 through the water inlet pipe 11, and the disperser 9 evenly discharges the underground water into the filter tank body 1, and then passes through the pebble cushion layer 15 and the filter fiber ball 16 for filtration, and finally is discharged through the water outlet pipe 8. In this process, the measuring instrument 5 in the measuring manifold 10 can measure the underground water entering the filter tank body 1.

[0026] When the filter device of the water injection well needs to be cleaned, the external underground water will stop entering. At this time, the backwash valve 13 is opened, and cleaning water is added through the backwash water inlet pipe 14. At the same time, the rotating shaft 6 drives the filter fiber balls 16 to collide and rotate with each other through the stirring blades 7, so that the debris attached to the filter fiber balls 16 can be discharged through the backwash drain pipe 12 along with the cleaning water.

[0027] The filtering device for the water injection well has a compact structure and an ingenious design. After filtering the underground water of the water injection well through the filtering fiber balls 16, the cleaning work can be completed by backwashing, thereby solving the problem of frequent replacement of filter elements in existing filtering devices. The filtering device is particularly suitable for filtering water injection wells.

Claims

1. A filtering device for a water injection well, comprising a filtering tank body (1), a measuring manifold (10), a disperser (9) and a water inlet pipe (11); characterized in that: The filter tank body (1) is provided with a sleeve (3) through a bracket (2); a grille plate (4) is provided at the lower end of the sleeve (3); a rotating shaft (6) is provided inside the sleeve (3) through a driving mechanism; a stirring blade (7) is provided at the lower end of the rotating shaft (6) after passing through the grille plate (4); a water outlet pipe (8) is connected to one side of the sleeve (3); the upper end of the water outlet pipe (8) extends to the outside of the filter tank body (1); a disperser (9) is provided at the bottom of the filter tank body (1); one end of the disperser (9) extends to the outside of the filter tank body (1) and is connected to a water inlet pipe (11) through a measuring manifold (10); a backwash drain pipe (12) and a backwash valve (13) are connected to the bottom end of the measuring manifold (10); and a backwash inlet pipe (14) is provided at the top of the filter tank body (1).

2. A filtering device for a water injection well according to claim 1, characterized in that: A pebble cushion layer (15) is provided at the bottom of the filter tank body (1); filter fiber balls (16) are placed above the pebble cushion layer (15).

3. A filtering device for a water injection well according to claim 1, characterized in that: The disperser (9) comprises a main dispersion pipe (17) and a dispersion screen tube (18); the main dispersion pipe (17) is installed at the bottom of the filter tank body (1); one end of the main dispersion pipe (17) extends to the outer end of the filter tank body (1) and is connected to the measuring manifold (10); a plurality of dispersion screen tubes (18) are connected to both sides of the main dispersion pipe (17); and the dispersion screen tube (18) is connected to the inner wall of the filter tank body (1) via a connecting rib plate (19).

4. A filtering device for a water injection well according to claim 1, characterized in that: The measuring manifold (10) comprises an upper union assembly (20), a lower union assembly (21), a flexible joint (22) and a measuring instrument (5); the water inlet pipe (11) is connected to the upper union assembly (20); the upper union assembly (20) is connected to the measuring instrument (5) via the flexible joint (22); and one end of the measuring instrument (5) is connected to the lower union assembly (21).

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