Oilfield self-circulation profile control and flooding injection device

Abstract

The utility model discloses an oil field self-circulation profile control and flooding injection device which comprises an oil field self-circulation profile control and flooding injection device body, the oil field self-circulation profile control and flooding injection device body comprises a self-circulation liquid distribution system and a double-wing injection distribution system, and the self-circulation liquid distribution system comprises a box body with the right side and the front side open. An injection pump is fixedly installed at the bottom of the right side of the box, and the inlet end of the injection pump communicates with and is fixed to a clear water pipeline. According to the utility model, a series of structures are arranged, so that the internal circumferential sides of the two liquid preparation tanks can be conveniently and transversely washed and uniformly mixed in sequence in a self-circulation manner, an additive and clear water are rotationally and flexibly stirred and mixed without cutting internal liquid, and rapid and uniform material mixing work is realized by utilizing flexible stirring and mixing to be matched with inner side dispersion circumferential inner washing; and compared with a single clear water discharging mode, the mixing efficiency and uniformity are effectively improved, the phenomenon of poor effect caused by non-uniform mixing is avoided, and the use effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of profile control and flooding control in oil and gas field development, in particular to an oil field self-circulating profile control and flooding control injection device. Background Art

[0002] There are two common problems in the middle and late stages of oilfield water injection development: first, the water content of production wells increases, which increases the invalid load of pumping units and increases the cost of surface water treatment; second, due to the long-term seepage and scouring of injected water underground, a dominant water flow channel is formed in the reservoir, the remaining oil is difficult to be affected, and the recovery rate is greatly reduced; the technical measures currently widely adopted are profile adjustment and flooding, injecting chemicals from the injection wells to seal the dominant channels, adjust the water absorption profile of the injection layer, and force subsequent injected water to flow around to increase the affected volume. After the chemicals solidify or expand, they can also reduce the permeability of the high permeability layer and improve the oil displacement effect of the injected water in the low permeability layer.

[0003] There are two methods for water injection well profile control and plugging high permeability layers: the single-liquid method and the double-liquid method. The single-liquid method injects a liquid into the oil layer. After the liquid enters the oil layer, it reacts on its own to form a substance that can plug the high permeability layer, reduce the permeability, and achieve water blocking. The plugging agents of the single-liquid method include lime milk, silica sol, chromium jelly, sulfuric acid, and water-in-water thick oil. The double-liquid method injects two reactive liquids separated by an isolation fluid into the oil layer. When the two liquids are pushed into the oil layer to a certain distance, the isolation fluid will become too thin to have an isolation effect. The two liquids can then react to produce a substance that plugs the formation. Since the permeable layer absorbs more plugging agents, plugging mainly occurs in the high permeability layer, achieving the purpose of profile control. Regardless of the single-liquid method, centralized on-site liquid preparation and injection are required during construction. Currently, most liquid preparation uses a mixer stirring method, which inevitably causes repeated shearing of the chemical agents, resulting in viscosity loss of polymer agents.

[0004] In this regard, according to the search report of the novelty search agency, announcement number CN211900567U discloses an oilfield self-circulating profile adjustment and drive injection device, including a self-circulating liquid dispensing system and a double-wing dispensing system. The self-circulating liquid dispensing system includes two parallel liquid dispensing tanks, an injection pump, two inlet valves, two outlet valves, a circulation valve, a water supply valve, a first auxiliary pipeline and a clean water pipeline. Funnel feeders are fixed on the top of the two liquid dispensing tanks, and the first auxiliary pipeline surrounds the outside of the two liquid dispensing tanks; the self-circulating loop is closed, and the solute and solvent are fully mixed and dissolved by circulating flow, replacing the high-speed rotating liquid dispensing method of the agitator in the liquid dispensing tank during traditional liquid dispensing, greatly reducing the shearing effect of high-speed stirring on polymer chemicals, and reducing viscosity loss. The double-wing dispensing valve is used to dispense different chemical plugs, replacing the traditional single-wing single valve, avoiding the need to repeatedly switch valves when injecting other plugs.

[0005] The above technology discloses an oilfield self-circulating profile control and flooding injection device, which opens the corresponding valve and cooperates with the injection pump to spray water from the top into the water distribution pipe, forming a circulating flow and counter-mixing with the corresponding additives inside to achieve a self-circulating liquid distribution effect. However, this part has the following shortcomings when used: the simple use of the circulating flow of water and the counter-mixing of additives has unsatisfactory mixing efficiency and uniformity, and it is difficult to quickly and evenly mix the additives with clean water; in view of this, on this basis, improvements are made, and this application proposes an oilfield self-circulating profile control and flooding injection device to solve the above-mentioned problems. Utility Model Content

[0006] The purpose of the utility model is to provide an oil field self-circulating profile control and flooding control injection device to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an oilfield self-circulating profile control and flooding injection device, comprising an oilfield self-circulating profile control and flooding injection device body, the oilfield self-circulating profile control and flooding injection device body comprising a self-circulating liquid distribution system and a double-wing distribution injection system, the self-circulating liquid distribution system comprising a box body with openings on the right and front sides, an injection pump fixedly installed on the right bottom of the box body, the inlet end of the injection pump connected to and fixed with a clean water pipeline, a water supply valve and a filtering device located on the left side thereof are installed on the clean water pipeline, the water outlet of the injection pump connected to and fixed with an auxiliary pipeline, the right bottom of the auxiliary pipeline is integrally provided with a connecting pipe port connected and fixed to the double-wing distribution injection system; wherein the specific composition structure of the double-wing distribution injection system, and the principle of cooperating with the injection pump for injection after liquid distribution are prior art, and the use of a filtering device for filtering during water supply and opening the water supply valve for water supply are prior art, in addition, this composition and technology have also been disclosed in the above-mentioned prior art CN211900567U, which is the same as it and will not be elaborated on again;

[0008] A circulation valve located above the connecting pipe mouth is installed on the auxiliary pipeline, and two swivel circumferential internal flushing mixing components, both of which are connected and fixed with the auxiliary pipeline, are fixedly installed on the top inner wall of the box body. A liquid distribution tank is provided in a sealed rotating sleeve inside the swivel circumferential internal flushing mixing component, and a plurality of arc-shaped smooth protrusions are fixedly connected to the side wall and the bottom inner wall of the liquid distribution tank. An outlet valve connected and fixed with the clean water pipeline is sealed and rotatably embedded in the bottom of the liquid distribution tank; the swivel circumferential internal flushing mixing component is used to rotatably support the liquid distribution tank, and is used to disperse the circumferential internal flushing inside the liquid distribution tank when the injection pump is turned on to extract clean water, so as to mix it with the added squeezer;

[0009] A joint drive assembly for driving the two liquid dispensing tanks to rotate synchronously is installed on the top inner wall of the box body; the joint drive assembly is used to drive the two liquid dispensing tanks to rotate, and the rotation of the liquid dispensing tanks drives the corresponding arc-shaped smooth protrusions to further perform flexible mixing without cutting, and the flexible stirring mixing is combined with the inner side dispersion circumferential inward punching to achieve fast and uniform mixing.

[0010] Preferably, the rotary support circumferential inward flushing mixing assembly includes a circular cover fixedly mounted on the inner wall of the top of the box body, the liquid distribution tank is sealingly and rotatably sleeved in the corresponding circular cover, a funnel feeder connected to the interior of the corresponding liquid distribution tank is embedded and fixed on the left side of the top of the circular cover, an inlet valve is fixedly connected to the top of the circular cover, the top of the inlet valve is connected and fixed to the auxiliary pipeline, the bottom end of the inlet valve extends into the corresponding liquid distribution tank and is connected and fixed to a vertical pipe with a sealing structure at the bottom end, and a plurality of water spray holes are evenly spaced on the four sides of the vertical pipe.

[0011] Preferably, the coupled drive assembly includes a drive motor embedded and fixed on the inner wall of the top of the box body, the bottom end of the output shaft of the drive motor is fixedly connected to the first gear, both sides of the first gear are engaged with outer gear rings, and the two outer gear rings are respectively fixedly mounted on the corresponding liquid distribution tanks.

[0012] Preferably, a circular embedding hole is provided at the bottom of the liquid dispensing tank, and two first sealing bearings are fixedly sleeved in the circular embedding hole. The inner ring of the first sealing bearing is fixedly sleeved on the outer side of the top end of the corresponding outlet valve, and the top of the valve body of the outlet valve does not contact the bottom of the corresponding liquid dispensing tank.

[0013] Preferably, a through hole for the clean water pipeline to pass through is opened on the left inner wall of the box body, and the water supply valve is fixedly installed on the left inner wall of the box body.

[0014] Preferably, the top of the box body is provided with two circular through-holes which are respectively fixedly connected to the outer sides of corresponding hopper feeders, and the hopper feeder on the right is located at the rear side of the auxiliary pipeline.

[0015] Preferably, two supporting seats are fixedly connected between the top of the round cover and the top inner wall of the box body.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The liquid distribution tank, the spiral circumferential internal flushing mixing component, the outlet valve, the clean water pipeline, the water supply valve, the injection pump, the auxiliary pipeline and the circulation valve are coordinated to sequentially self-circulate and uniformly flush the inner circumference of the two liquid distribution tanks, which improves the mixing efficiency and uniformity compared with the method of only discharging clean water;

[0018] 2. By cooperating with the set joint drive assembly, water distribution tank and arc-shaped smooth protrusion, the two liquid distribution tanks are driven to rotate at the same time, so as to drive the arc-shaped smooth protrusion on the inside to flexibly stir the additives and clean water. By utilizing the flexible stirring at the side and bottom, the additives and clean water are rotated and flexibly stirred and mixed without cutting the internal liquid. The flexible stirring mixing is combined with the inner dispersed circumferential inward flushing to achieve fast and uniform mixing, further improve the mixing efficiency and uniformity, avoid the phenomenon of poor effect due to uneven mixing, and improve the use effect.

[0019] The utility model is provided with a series of structures, which are convenient for self-circulating in sequence to disperse and mix the inner circumferences of the two liquid dispensing tanks in a horizontal manner, and to perform rotational flexible stirring and mixing of the additives and clean water without cutting the internal liquid. The flexible stirring mixing is combined with the inner side dispersion and circumferential inward flushing to achieve fast and uniform mixing. Compared with the method of simply discharging clean water, the utility model effectively improves the mixing efficiency and uniformity, avoids the phenomenon of poor effect due to uneven mixing, and improves the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of an existing oilfield self-circulating profile control and flooding injection device;

[0021] Figure 2 This is a structural diagram of an oilfield self-circulating profile control and flooding injection device proposed by the utility model;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of a self-circulating liquid distribution system of an oil field self-circulating profile control and flooding injection device proposed by the utility model;

[0023] Figure 4 This is a schematic diagram of the main and sectional structure of a self-circulating liquid distribution system of an oil field self-circulating profile control and flooding injection device proposed by the utility model.

[0024] In the figure: 100, double-wing injection system; 1, box body; 2, liquid dispensing tank; 201, arc-shaped smooth protrusion; 3, clean water pipeline; 301, water supply valve; 302, filter device; 303, outlet valve; 4, auxiliary pipeline; 401, circulation valve; 402, inlet valve; 403, vertical pipe; 404, water spray hole; 405, connecting pipe mouth; 5, round cover; 501, funnel feeder; 6, drive motor; 601, first gear; 602, outer ring gear; 7, injection pump. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figures 2 to 4 As shown, the present embodiment proposes an oilfield self-circulating profile control and flooding injection device, including an oilfield self-circulating profile control and flooding injection device body, the oilfield self-circulating profile control and flooding injection device body includes a self-circulating liquid distribution system and a double-wing distribution system 100, the self-circulating liquid distribution system includes a box body 1 with openings on the right and front sides, an injection pump 7 is fixedly installed on the right bottom of the box body 1, the inlet end of the injection pump 7 is connected and fixed with a clean water pipeline 3, a water supply valve 301 and a filter device 302 located on its left side are installed on the clean water pipeline 3, a through hole for the clean water pipeline 3 to pass through is opened on the left inner wall of the box body 1, and the water supply valve 301 is fixedly mounted on the left inner wall of the housing 1. The water outlet of the injection pump 7 is connected to and fixedly connected to the auxiliary pipeline 4. The right bottom of the auxiliary pipeline 4 is integrally provided with a connecting pipe port 405 that is connected to and fixedly connected to the double-wing injection system 100. The specific composition and structure of the double-wing injection system 100 and the principle of injecting liquid after mixing with the injection pump 7 are prior art. The use of the filter device 302 for filtering during water supply and opening the water supply valve 301 for water supply are also prior art. In addition, this composition and technology are also disclosed in the above-mentioned prior art CN211900567U and are the same as those thereof, so they will not be further elaborated on.

[0027] A circulation valve 401 located above the connecting pipe mouth 405 is installed on the auxiliary pipeline 4, and two swivel support circumferential inward flushing mixing components are fixedly installed on the top inner wall of the box body 1, which are both connected to the auxiliary pipeline 4. The sealing rotating sleeve inside the swivel support circumferential inward flushing mixing component is provided with a liquid distribution tank 2, and a plurality of arc-shaped smooth protrusions 201 are fixedly connected to the side wall and the bottom inner wall of the liquid distribution tank 2. The bottom of the liquid distribution tank 2 is sealed and rotatably embedded with an outlet valve 303 connected to the clean water pipeline 3, wherein a circular embedding hole is provided at the bottom of the liquid distribution tank 2, and a fixed hole is provided in the circular embedding hole. The fixed sleeve is provided with two first sealing bearings, the inner ring of the first sealing bearing is fixedly sleeved with the outer side of the top end of the corresponding outlet valve 303, and the top of the valve body of the outlet valve 303 does not contact the bottom of the corresponding liquid mixing tank 2, which prevents the rotational torque from being transmitted to the corresponding outlet valve 303 when the liquid mixing tank 2 rotates, and provides the conditions for the liquid mixing tank 2 to rotate independently; the circumferential inward flush mixing assembly of the rotary support is used to support the liquid mixing tank 2 for rotation, and is used to disperse the circumferential inward flush inside the liquid mixing tank 2 when the injection pump 7 is turned on to extract clean water, so as to mix it with the added squeezer;

[0028] A joint drive assembly for driving the two liquid dispensing tanks 2 to rotate synchronously is installed on the top inner wall of the box body 1; the joint drive assembly is used to drive the two liquid dispensing tanks 2 to rotate, and the rotation of the liquid dispensing tanks 2 drives the corresponding arc-shaped smooth protrusions 201 to further perform flexible mixing without cutting, and utilizes flexible stirring mixing and inner dispersion circumferential inward punching to achieve fast and uniform mixing.

[0029] Specifically, the rotary circumferential inward flushing mixing assembly includes a circular cover 5 fixedly mounted on the top inner wall of the box body 1, wherein two support seats are fixedly connected between the top of the circular cover 5 and the top inner wall of the box body 1, which play a role in fixing and supporting the circular cover 5, and the liquid mixing tank 2 is sealed and rotated in the corresponding circular cover 5, wherein the circular cover 5 is fixedly sleeved with a second sealing bearing, and the inner ring of the second sealing bearing is fixedly sleeved with the outer side of the corresponding liquid mixing tank 2, which plays a role in sealing and rotating installation of the liquid mixing tank 2, and a funnel feeder 501 connected to the interior of the corresponding liquid mixing tank 2 is embedded and fixed on the left side of the top of the circular cover 5, and an inlet valve 402 is fixedly connected to the top of the circular cover 5, and the top of the inlet valve 402 is fixedly connected to the auxiliary pipeline 4, and the bottom end of the inlet valve 402 extends into the corresponding liquid mixing tank 2. It is connected to a vertical pipe 403 with a blocking structure at the bottom end, and a plurality of water spray holes 404 are evenly spaced on the four sides of the vertical pipe 403. Two circular through-holes are provided on the top of the box body 1, which are respectively fixedly connected to the outer sides of the corresponding funnel feeders 501. The funnel feeder 501 on the right is located on the rear side of the auxiliary pipeline 4. The round cover 5, the funnel feeder 501, the inlet valve 402, the vertical pipe 403 and the water spray holes 404 are coordinated. When the corresponding inlet valve 402 is opened to allow the clean water supplied by the injection pump 7 to enter, the clean water enters the corresponding vertical pipe 403, and then passes through the plurality of water spray holes 404 for lateral dispersion and mixing. The lateral dispersion and mixing are used to achieve preliminary dispersion and uniform mixing with the corresponding additives. Compared with the method of single discharge of clean water, the mixing efficiency and uniformity are improved.

[0030] Furthermore, the coupled drive assembly includes a drive motor 6 embedded and fixed on the top inner wall of the box body 1, and the bottom end of the output shaft of the drive motor 6 is fixedly connected to the first gear 601, and both sides of the first gear 601 are meshed with outer ring gears 602, and the two outer ring gears 602 are fixedly sleeved on the corresponding liquid mixing tanks 2 respectively; the set drive motor 6, the first gear 601 and the outer ring gear 602 cooperate, and the drive motor 6 drives the first gear 601 to rotate, and the first gear 601 drives the two outer ring gears 602 to rotate at the same time, and the two outer ring gears 602 drive the two liquid mixing tanks 2 to rotate at the same time, and the rotation of the liquid mixing tank 2 drives the corresponding arc-shaped smooth protrusions 201 to further perform flexible mixing without cutting, and utilizes flexible stirring mixing to cooperate with the inner side dispersion circumferential inward punching to achieve rapid and uniform mixing, further improving mixing efficiency and uniformity.

[0031] The method of use of this embodiment is as follows: when circulating the liquid, the corresponding additives are added to the two liquid preparation tanks 2 respectively through the two funnel feeders 501, such as adding the high-concentration mother liquor of agent A to the liquid preparation tank 2 on the left and adding calcium salt to the liquid preparation tank 2 on the right as needed. First, open the water supply valve 301 and the two outlet valves 303 respectively, use the clean water pipeline 3 and the two water supply valves 301 to supply clean water to the two liquid preparation tanks 2 in proportion, close the water supply valve 301 and the outlet valve 303 on the right, open the inlet valve 402 on the left, the injection pump 7, the circulation valve 401 and the drive motor 6, and the injection pump 7 draws the liquid from the liquid preparation tank 2 on the left through the outlet valve 303 on the left. The liquid in the liquid dispensing tank 2 is supplied to the auxiliary pipeline 4, and the liquid enters the vertical pipe 403 on the left through the inlet valve 402 on the left, and then undergoes lateral scattering and mixing through the corresponding multiple water spray holes 404. The lateral scattering and mixing is performed by the lateral scattering and mixing to achieve preliminary scattering and mixing with the corresponding additives, which improves the mixing efficiency and uniformity compared with the method of simply discharging clean water. After mixing in the liquid dispensing tank 2 on the left, the inlet valve 402 and the outlet valve 303 on the left are closed, and the inlet valve 402 and the outlet valve 303 on the right are opened. At this time, the liquid in the liquid dispensing tank 2 on the right is extracted, and circulated into the liquid dispensing tank 2 on the right for lateral scattering and mixing, thereby achieving the effect of self-circulation and uniform mixing.

[0032] After the ingredients are evenly mixed, the circulation valve 401 is closed and the outlet valve 303 on the left is opened. At this time, the injection pump 7 cooperates with the double-wing injection system 100 to perform the injection work. When the liquid in the liquid preparation tank 2 on the right needs to be injected, the outlet valve 303 on the left is closed and the outlet valve 303 on the right is opened. The specific composition and structure of the double-wing injection system 100 and the principle of injecting after the liquid is prepared with the injection pump 7 are prior art. The use of the filter device 302 for filtering during water supply and opening the water supply valve 301 for water supply are also prior art. In addition, this composition and technology have also been disclosed in the above-mentioned prior art CN211900567U, which is the same as it and will not be further elaborated on.

[0033] During the uniform mixing operation, when the driving motor 6 is started, it will drive the first gear 601 to rotate, and the first gear 601 will drive the two outer gear rings 602 to rotate at the same time, and the two outer gear rings 602 will drive the two liquid distribution tanks 2 to rotate at the same time, and the corresponding arc-shaped smooth protrusions 201 will be driven by the rotation of the liquid distribution tank 2 to further perform flexible mixing without cutting, and the flexible stirring mixing is combined with the inner side dispersion circumferential inward flushing to achieve fast and uniform mixing, further improving the mixing efficiency and uniformity. Compared with the existing simple method of using water to flush and mix on the upper part, it is convenient to mix the additives and clean water quickly and evenly, avoiding the phenomenon of poor effect due to uneven mixing.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An oilfield self-circulating profile control and flooding injection device, comprising an oilfield self-circulating profile control and flooding injection device body, the oilfield self-circulating profile control and flooding injection device body comprising a self-circulating liquid distribution system and a double-wing distribution injection system (100), characterized in that: The self-circulating liquid distribution system comprises a box body (1) with openings on both the right side and the front side. An injection pump (7) is fixedly installed at the bottom right side of the box body (1). The inlet end of the injection pump (7) is connected and fixedly connected to a clean water pipeline (3). A water supply valve (301) and a filter device (302) located on the left side of the clean water pipeline (3) are installed on the water outlet of the injection pump (7). An auxiliary pipeline (4) is connected and fixedly connected to the auxiliary pipeline (4). A connecting pipe port (405) connected and fixedly connected to the double-wing injection system (100) is integrally provided at the bottom right side of the auxiliary pipeline (4). The auxiliary pipeline (4) is provided with a circulation valve (401) located above the connecting pipe port (405). Two rotating circumferential inward flushing mixing components, both of which are in fixed communication with the auxiliary pipeline (4), are fixedly provided on the top inner wall of the box body (1). A liquid dispensing tank (2) is provided in a sealed rotating sleeve within the rotating circumferential inward flushing mixing component. Multiple arc-shaped smooth protrusions (201) are fixedly provided on the side walls and bottom inner wall of the liquid dispensing tank (2). An outlet valve (303) in fixed communication with the clean water pipeline (3) is sealed and rotatably embedded in the bottom of the liquid dispensing tank (2); A joint drive assembly for driving the two liquid distribution tanks (2) to rotate synchronously is installed on the top inner wall of the box body (1).

2. The oilfield self-circulating profile control and flooding control injection device according to claim 1, characterized in that: The rotary support circumferential inward flushing mixing assembly comprises a circular cover (5) fixedly mounted on the inner wall of the top of the box body (1); the liquid dispensing tank (2) is sealed and rotatably sleeved in the corresponding circular cover (5); a funnel feeder (501) connected to the interior of the corresponding liquid dispensing tank (2) is fixedly embedded on the left side of the top of the circular cover (5); an inlet valve (402) is fixedly connected to the top of the circular cover (5); the top of the inlet valve (402) is fixedly connected to the auxiliary pipeline (4); the bottom end of the inlet valve (402) extends into the corresponding liquid dispensing tank (2) and is fixedly connected to a vertical pipe (403) with a blocking structure at the bottom end; and a plurality of water spray holes (404) are evenly spaced on four sides of the vertical pipe (403).

3. The oilfield self-circulating profile control and flooding control injection device according to claim 1, characterized in that: The coupled drive assembly comprises a drive motor (6) embedded and fixed on the inner wall of the top of the box (1); the bottom end of the output shaft of the drive motor (6) is fixedly connected to a first gear (601); both sides of the first gear (601) are meshed with outer gear rings (602); the two outer gear rings (602) are respectively fixedly sleeved on corresponding liquid distribution tanks (2).

4. The oilfield self-circulating profile control and flooding control injection device according to claim 1, characterized in that: A circular embedding hole is provided at the bottom of the liquid dispensing tank (2), and two first sealing bearings are fixedly sleeved in the circular embedding hole. The inner rings of the first sealing bearings are fixedly sleeved on the outer top ends of the corresponding outlet valves (303), and the top of the valve body of the outlet valve (303) does not contact the bottom of the corresponding liquid dispensing tank (2).

5. The oilfield self-circulating profile control and flooding control injection device according to claim 1, characterized in that: A through hole for the clean water pipeline (3) to pass through is provided on the left inner wall of the box body (1), and the water supply valve (301) is fixedly mounted on the left inner wall of the box body (1).

6. The oilfield self-circulating profile control and flooding control injection device according to claim 2, characterized in that: The top of the box body (1) is provided with two circular through-holes which are respectively fixedly connected to the outsides of corresponding hopper feeders (501), and the hopper feeder (501) on the right is located at the rear side of the auxiliary pipeline (4).

7. The oilfield self-circulating profile control and flooding control injection device according to claim 2, characterized in that: Two supporting seats are fixedly connected between the top of the circular cover (5) and the top inner wall of the box body (1).

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