Adjustable water injection device for oil exploitation

Abstract

The utility model relates to the technical field of oil exploitation, and provides an adjustable water injection device for oil exploitation, which comprises a water injection pipe (1) and a filter box (5), the water injection pipe (1) is communicated with a first water delivery pipe (2), the first water delivery pipe (2) is connected with a second water delivery pipe (4) through a one-way valve (3), the lower end of the filter box (5) is communicated with a water outlet pipe (6), and the water outlet pipe (6) is connected with the second water delivery pipe (4). The upper end of the filter box (5) is communicated with a water inlet pipe (7); a plurality of through grooves (51) are formed in the filter box (5) at equal intervals, plugging blocks (8) are inserted into the through grooves (51), the sides, located in the filter box (5), of the plugging blocks (8) are detachably connected with mounting frames (10), and filter screen plates (11) are fixedly connected into the mounting frames (10). The number of the filter screen plates can be increased or decreased according to requirements, so that the filter pressure is relieved, and the cleaning frequency of the filter screen plates is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil exploitation, more specifically, particularly relates to an adjustable water injection device for oil exploitation. BACKGROUND

[0002] Water injection for oil exploitation refers to injecting water into the oil layer to increase the oil recovery rate by increasing the oil layer pressure. The main purpose is to supplement the oil layer energy to overcome the oil layer pressure drop caused by the oil production, and to ensure that the crude oil can flow to the production well continuously and efficiently. However, in order to reduce the use of direct water source, secondary water after oil production operation is usually used for water injection operation, and the secondary water contains a large amount of sand and impurity particles.

[0003] The patent file with patent number CN219605263U discloses a kind of petroleum downhole high-pressure water injection device, belong to the technical field of oil exploitation equipment, including first water injection pipe, first water injection pipe is connected with water flow meter by flange, the water inlet end of water flow meter is connected with tee joint by flange, the water inlet end of tee joint is connected with second water injection pipe by flange, the water inlet end of second water injection pipe is connected with filter box by flange, the inner wall of filter box is provided with clamping groove on one side, ladder hole is formed in one side of filter box, ladder block is inserted in ladder hole, and filter screen plate is arranged on one side of ladder block. When secondary water is pumped into the third water injection pipe of the water injection device by external high-pressure water pump, when continuing to discharge, since the left end of filter screen plate is slidably inserted into clamping groove, the front and back sides of filter screen plate are stably contacted with the front and back of the inner wall of filter box, so that the impurity particles and sand particles in secondary water can be effectively filtered by the arrangement of filter screen plate, and the pollution to downhole environment is reduced.

[0004] In the prior art, only a single filter screen plate is used for filtering, which has a large filtering pressure and is easily blocked by impurity particles and sand particles of different sizes, so that the filter screen plate needs to be cleaned frequently. UTILITY MODEL CONTENT

[0005] The utility model is aimed at providing an adjustable water injection device for oil exploitation, which can increase or decrease the number of filter screen plates according to demand to relieve filtering pressure and reduce the cleaning frequency of filter screen plates.

[0006] An adjustable water injection device for oil extraction includes a water injection pipe and a filter box. The water injection pipe is connected to a first water supply pipe, which is connected to a second water supply pipe via a one-way valve. The lower end of the filter box is connected to an outlet pipe, which is connected to the second water supply pipe via a flange. The upper end of the filter box is connected to an inlet pipe, which is connected to an external high-pressure water pump. The filter box has multiple through slots at equal intervals, and sealing blocks are inserted into the through slots. The sealing blocks are detachably connected to an installation frame on one side of the filter box, and a filter screen is fixedly installed in the installation frame.

[0007] Furthermore, the mesh size of the plurality of filter plates increases sequentially from bottom to top.

[0008] Furthermore, the mesh diameter of the filter plate located at the bottom is 1 mm.

[0009] Furthermore, each of the sealing blocks is fixed to a fixing plate, which is detachably connected to the outside of the filter box.

[0010] Furthermore, a locking block is fixed to the inner wall of the filter box, and a groove is formed on the side of the locking block near the through groove, into which the mounting frame is inserted.

[0011] Furthermore, a sealing strip is fixedly attached to the sealing block.

[0012] Furthermore, the sealing strip is a rubber strip.

[0013] Furthermore, a water flow meter and a T-joint are provided between the first water supply pipe and the water injection pipe. The water injection pipe is connected to the outlet end of the water flow meter, the inlet end of the water flow meter is connected to the outlet end of the T-joint, and the inlet end of the T-joint is connected to the outlet end of the first water supply pipe.

[0014] Furthermore, a PLC controller is installed on the outer wall of the filter box.

[0015] Furthermore, the other outlet of the three-way connector is connected to a water distribution pipe, and an electromagnetic control valve is installed on the water distribution pipe. The signal output terminal of the water flow meter is connected to an external computer, and the signal output terminal of the external computer is connected to the PLC controller. The electromagnetic control valve is electrically connected to the PLC controller, and the power input terminal of the electromagnetic control valve is connected to the control output terminal of the PLC controller.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this invention, by setting multiple filter screens, the filtration pressure of the device is relieved, and impurity particles of different sizes are blocked and filtered on filter screens with different mesh sizes, which can also reduce the cleaning frequency of the filter screens. Since the mounting frame is detachably connected to the sealing block, the number of filter screens can be increased or decreased according to the content of impurity particles in the secondary water. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of an adjustable water injection device used in oil extraction, as shown in Embodiment 1.

[0020] Figure 2 This is a schematic diagram of the interior of the filter box in Example 1;

[0021] Figure 3 This is a partial structural breakdown diagram of Example 1;

[0022] Figure 4 This is a split view of the connecting plate and the sealing block in Embodiment 1;

[0023] Figure 5 This is a schematic diagram of the overall structure in Embodiment 2.

[0024] In the diagram: 1. Water inlet pipe; 2. First water supply pipe; 3. Check valve; 4. Second water supply pipe; 5. Filter box; 51. Through groove; 6. Water outlet pipe; 7. Water inlet pipe; 8. Sealing block; 9. First bolt; 10. Mounting frame; 11. Filter screen; 12. Fixing plate; 13. Second bolt; 14. Clamping block; 15. PLC controller; 16. Water flow meter; 17. T-joint; 18. Divider pipe; 19. Solenoid control valve; 20. Handle; 21. Sealing strip. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1:

[0027] like Figures 1-4As shown, an adjustable water injection device for oil well drilling includes a water injection pipe 1 and a filter box 5. The water injection pipe 1 is inserted into the well and a high-sealing sealing mechanism is used to seal the wellhead and the water injection pipe 1. A first water delivery pipe 2 is fixedly connected to the water injection pipe 1 via a flange. A second water delivery pipe 4 is connected to the first water delivery pipe 2 via a one-way valve 3. The lower end of the filter box 5 is connected to an outlet pipe 6, which is connected to the second water delivery pipe 4 via a flange. The upper end of the filter box 5 is connected to an inlet pipe 7. The inlet pipe 7 is connected to... An external high-pressure water pump is connected to the drain end. Multiple through slots 51 are evenly spaced on the filter box 5. A sealing block 8, adapted to the through slot 51, is inserted into each through slot 51. The sealing block 8 is detachably connected to a mounting frame 10 on one side of the filter box 5 via a first bolt 9. A filter screen 11 is fixedly connected within the mounting frame 10. The mesh size of the multiple filter screens 11 increases sequentially from bottom to top. In this embodiment, the mesh diameter of the bottommost filter screen 11 is 1mm, and four through slots 51 are provided. By setting multiple filter screens 11, the filtration pressure of the device is relieved, and impurities of different sizes are blocked and filtered onto filter screens 11 with different mesh sizes, thus reducing the cleaning frequency of the filter screens 11. Since the mounting frame 10 is detachably connected to the sealing block 8, the number of filter screens 11 can be increased or decreased according to the content of impurities in the secondary water.

[0028] like Figures 1-4 As shown, each sealing block 8 is fixedly connected to the fixing plate 12, and the fixing plate 12 is detachably connected to the outside of the filter box 5 by the second bolt 13. By setting the fixing plate 12, the sealing blocks 8 are prevented from detaching from the filter box 5 due to external forces, making the filter screen 11 more stable.

[0029] like Figures 1-4 As shown, the inner wall of the filter box 5 is fixedly connected with a locking block 14 corresponding to the horizontal position and number of the through groove 51. The locking block 14 has a groove on the side near the through groove 51. The size of the groove is adapted to the mounting frame 10 so that the mounting frame 10 can be inserted into the groove. This provides limiting support for the end of the mounting frame 10 and further stabilizes the filter screen 11.

[0030] like Figures 1-4 As shown, a sealing strip 21 is fixedly connected to the sealing block 8. In this embodiment, the sealing strip 21 is a rubber strip. The sealing strip 21 is set to make the sealing block 8 and the through groove 51 tightly connected, reducing the chance of water leakage.

[0031] like Figures 1-4 As shown, a handle 20 is fixedly connected to the fixing plate 12. The handle 20 facilitates pulling the fixing plate 12 to remove the sealing block 8, the mounting frame 10 and the filter screen 11 from the filter box 5, and also provides some convenience during installation.

[0032] The working principle of the adjustable water injection device for oil extraction in this embodiment is as follows: During use, the inlet pipe 7 is connected to an external high-pressure water pump, and the inlet end of the external high-pressure water pump is connected to a water storage tank. Since the mounting frame 10 is detachably connected to the sealing block 8, the number of filter screens 11 can be increased or decreased according to the content of impurity particles in the secondary water. Water flows through the inlet pipe 7 into the filter box 5. The mesh size of the multiple filter screens 11 in the filter box 5 is different and increases from bottom to top, which relieves the filtration pressure of the device and blocks and filters impurity particles of different sizes on the filter screens 11 with different mesh sizes, which can also reduce the cleaning frequency of the filter screens 11. Then the water flows through the outlet pipe 6 to the one-way valve 3, the first water supply pipe 2 and the water injection pipe 1 in sequence, and finally is injected into the well. The one-way valve 3 is set to prevent the well water from flowing back into the filter box 5.

[0033] Example 2:

[0034] like Figure 5 As shown, the difference from Embodiment 1 is that a PLC controller 15 is installed on the outer wall of the filter box 5; a flow meter 16 and a three-way connector 17 are installed between the first water supply pipe 2 and the water injection pipe 1; the water injection pipe 1 is connected to the outlet end of the flow meter 16 via a flange; the inlet end of the flow meter 16 is connected to the outlet end of the three-way connector 17 via a flange; the inlet end of the three-way connector 17 is connected to the outlet end of the first water supply pipe 2 via a flange; the other outlet end of the three-way connector 17 is connected to a distribution pipe 18 via a flange; an electromagnetic control valve 19 is installed on the distribution pipe 18 to distribute water... Pipe 18 is connected to the water storage tank (the water pumped by the external high-pressure water pump comes from the water storage tank). The signal output terminal of the water flow meter 16 is first connected to the external computer through the information of the transmitter with 485 communication protocol. The signal output terminal of the external computer is connected to the signal control terminal of the PLC controller 15 via the transmission line. The input terminal of the electromagnetic control valve 19 is connected to the control terminal of the PLC controller 15. The power input terminal of the electromagnetic control valve 19 is connected to the control output terminal of the PLC controller 15 via the wire. All the equipment in the device that requires electricity is electrically connected to the external power supply (except for the electromagnetic control valve 19).

[0035] The working principle of the adjustable water injection device for oil wells in this embodiment is as follows: the maximum flow rate can be set on the external computer. When the flow rate data sent by the water flow meter 16 to the computer is greater than the set maximum flow rate, the computer inputs a signal to the PLC controller 15 to disconnect the power supply of the solenoid control valve 19. The PLC controller 15 then connects the power supply to the solenoid control valve 19, and the solenoid control valve 19 opens, allowing the water to flow back to the storage tank through the water distribution pipe 18, thus avoiding the injection of excessive secondary water into the well.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adjustable water injection device for oil production, characterized by: The utility model provides a water filter, including water injection pipe (1) and filter box (5), first water pipe (2) is communicated on water injection pipe (1), first water pipe (2) is connected with second water pipe (4) through check valve (3), the lower end of filter box (5) is communicated with water outlet pipe (6), water outlet pipe (6) is connected with second water pipe (4) through flange, the upper end of filter box (5) is communicated with water inlet pipe (7), water inlet pipe (7) is connected with external high pressure water pump, equal interval is set up with a plurality of through slot (51) on filter box (5), the through slot (51) is inserted with the obturator (8), the obturator (8) is located in the filter box (5) one side detachably connected with the installation frame (10), the filter screen board (11) is fixedly connected in the installation frame (10).

2. An adjustable water injection device for oil extraction according to claim 1, characterized in that: The mesh size of the plurality of filter screen boards (11) gradually increases from bottom to top.

3. An adjustable water injection device for oil extraction according to claim 2, characterized in that: The mesh diameter of the lowermost filter screen board (11) is 1mm.

4. The adjustable water injection device for oil extraction according to claim 1, characterized in that: Each obturator (8) is fixedly connected to a fixed plate (12), and the fixed plate (12) is detachably connected to the outer side of the filter box (5).

5. The adjustable water injection device for oil extraction according to claim 1, characterized in that: A clamping block (14) is fixedly connected to the inner wall of the filter box (5), and a groove is formed in the side of the clamping block (14) close to the through slot (51), and the installation frame (10) is inserted into the groove.

6. An adjustable water injection device for oil production as claimed in claim 1 wherein: A sealing strip (21) is fixedly connected to the obturator (8).

7. An adjustable water injection device for oil production according to claim 6, characterized in that: The sealing strip (21) is a rubber strip.

8. An adjustable water injection device for oil production according to claim 1, characterized in that: A water flow meter (16) and a tee joint (17) are arranged between the first water pipe (2) and the water injection pipe (1), the water injection pipe (1) is communicated with the water outlet end of the water flow meter (16), the water inlet end of the water flow meter (16) is communicated with the water outlet end of the tee joint (17), and the water inlet end of the tee joint (17) is communicated with the water outlet end of the first water pipe (2).

9. An adjustable water injection device for oil production according to claim 8, characterized in that: A PLC controller is installed on the outer side wall of the filter box (5).

10. An adjustable water injection device for oil production according to claim 9, characterized in that: Another water outlet end of the tee joint (17) is communicated with a water distribution pipe (18), the water distribution pipe (18) is provided with an electromagnetic control valve (19), the signal output end of the water flow meter (16) is connected with an external computer, the signal output end of the external computer is connected with the PLC controller (15), the electromagnetic control valve (19) is electrically connected with the PLC controller (15), and the power input end of the electromagnetic control valve (19) is connected with the control input end of the PLC controller (15).

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