A split concentric water distributor for a fouled well

Abstract

The application discloses a split type concentric water distributor for a scaling well and belongs to the technical field of water injection, which comprises a shell, a first disc is fixedly connected to the circumferential inner wall of the shell, two first circular holes are formed in the upper end of the first disc, a lifting mechanism is arranged on the lower side of the first disc, a sliding groove is arranged on the lower side of the lifting mechanism, a hollow column is arranged in the sliding groove, a water injection mechanism is arranged in the hollow column, a second disc is fixedly connected to the circumferential inner wall of the shell, a pressure reduction mechanism is arranged on the upper side of the second disc, sliding grooves are formed in the left and right inner walls of the shell, water outlets are formed in the right ends of the two sliding grooves, the lifting mechanism comprises a servo motor, two second flow guide pipes, two threaded sleeves, two lead screws, a rotating shaft, two first rotating wheels, a first belt, two second rotating wheels and a second belt, and the servo motor is fixedly connected to the lower end of the first disc. It can realize the simplification of water injection operation of the scaling well, improve the water injection efficiency and reduce the cost.

Description

Technical Field

[0001] This invention relates to the field of water injection technology, and more specifically, to a split-type concentric water distributor for use in scaled wells. Background Technology

[0002] A water distributor is a specialized downhole tool used in stratified water injection to quantitatively inject water into each oil layer. It mainly consists of a water distribution body, water nozzles, nozzle bodies, pressure caps, and sealing rings. In stratified water injection wells, the technology of using water nozzles of different diameters in a stratified water distribution string to achieve quantitative water injection in different layers is called stratified water distribution. To resolve inter-layer conflicts, it rationally distributes injected water to each layer, maintaining formation pressure. Water injection is controlled in layers with good permeability and strong water absorption capacity, while water injection is strengthened in oil layers with poor permeability and weak water absorption capacity. This ensures that formations with different permeability can all play a role in water injection, achieving long-term high and stable oil production and improving ultimate recovery rate.

[0003] Existing patent CN113279736A discloses a bridge-type concentric water distributor, including an upper connector, an upper connecting sleeve, a central water outlet ring, a lower connecting sleeve, and a lower connector. The upper connector, upper connecting sleeve, central water outlet ring, lower connecting sleeve, and lower connector are sequentially threaded together from top to bottom. An anti-rotation positioning cylinder is internally threaded into the upper connecting sleeve, and the bottom end of the anti-rotation positioning cylinder contacts the top end of the central water outlet ring. However, this prior art still has the following drawbacks:

[0004] However, existing split-type water distributors require multiple well-filling injections, which is cumbersome, costly, and inaccurate.

[0005] Content of this invention

[0006] 1. Technical problems to be solved

[0007] In view of the problems existing in the prior art, the purpose of this invention is to provide a split concentric water distributor for use in scaled wells, which can simplify the water injection operation of scaled wells, improve water injection efficiency, and reduce costs.

[0008] 2. Technical Solution

[0009] To solve the above problems, the present invention adopts the following technical solution:

[0010] A split-type concentric water distributor for scaling wells includes a housing. A first disc is fixedly connected to the inner circumference of the housing. Two first circular holes are formed at the upper end of the first disc. A lifting mechanism is provided on the lower side of the first disc. A sliding groove is provided on the lower side of the lifting mechanism. A hollow column is provided in the sliding groove, and a water injection mechanism is provided in the hollow column. A second disc is fixedly connected to the inner circumference of the housing. A pressure reducing mechanism is provided on the upper side of the second disc. Sliding grooves are formed on both the left and right inner walls of the housing. Water outlets are formed at the right ends of both sliding grooves. This device simplifies the water injection operation of scaling wells, improves water injection efficiency, and reduces costs.

[0011] In a preferred embodiment of the present invention, the lifting mechanism includes a servo motor, two second guide tubes, two threaded sleeves, two lead screws, a rotating shaft, two first rotating wheels, a first belt, two second rotating wheels, and a second belt. The servo motor is fixedly connected to the lower end of the first disc. Both second guide tubes are fixedly connected to the lower end of the first disc and communicate with two first circular holes. Both first guide tubes are fixedly connected to the upper end of the hollow column and pass through the hollow column. The two second guide tubes are slidably connected to the two first guide tubes. The two threaded sleeves... The sleeve is fixedly connected to the lower end of the first disc, the two lead screws are fixedly connected to the upper end of the hollow column, and the two lead screws are respectively threaded into the threaded sleeve. The rotating shaft is fixedly connected to the output end of the servo motor, and the lower end of the rotating shaft is rotatably connected to the upper end of the hollow column. The two first rotating wheels are respectively fixedly connected to the circumferential surface of one of the lead screws and the circumferential surface of the rotating shaft, and a first belt is connected between the two first rotating wheels. The two second belts are respectively fixedly connected to the circumferential surface of the rotating shaft and the circumferential surface of the other lead screw, and a second belt is connected between the two second rotating wheels.

[0012] As a preferred embodiment of the present invention, a second limiting block is fixedly connected to the inner circumferential wall of each of the two first guide tubes, and a first limiting block is fixedly connected to the circumferential surface of each of the two second guide tubes.

[0013] In a preferred embodiment of the present invention, the injection mechanism includes an annular fixing block, two water pumps, two electronic controllers, two movable water nozzles, and two water inlets. The annular fixing block is fixedly connected to the circumferential surface of the hollow column. The two water pumps are respectively fixedly connected to the lower end of the annular fixing block. The two electronic controllers are respectively fixedly connected to the right end of the two water pumps. The two movable water nozzles are respectively fixedly connected to the front and rear ends of the two water pumps, and the two movable water nozzles pass through the front and rear ends of the hollow column. The two water inlets are respectively fixedly connected to the upper ends of the two water pumps, and both water pumps pass through the upper end of the annular fixing block.

[0014] As a preferred embodiment of the present invention, the pressure-reducing mechanism includes four telescopic rods and four springs. The four telescopic rods are all fixedly connected to the upper end of the second disc and are evenly distributed. The four springs are all sleeved on the circumferential surface of the telescopic rods.

[0015] As a preferred embodiment of the present invention, a sealing ring is fixedly connected to the lower end of the hollow column.

[0016] As a preferred embodiment of the present invention, both the upper and lower ends of the outer shell are fixedly connected to a frustum, and the two frustums are respectively fixedly connected to an upper interface and a lower interface.

[0017] As a preferred embodiment of the present invention, a motor housing is fixedly connected to the lower end of the first disk, and the servo motor is fixedly installed inside the motor housing.

[0018] As a preferred embodiment of the present invention, a filter screen is provided in both of the water outlet holes.

[0019] As a preferred embodiment of the present invention, sealing rubber rings are adhered to the upper inner walls of both of the sliding grooves.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the advantages of this invention are:

[0022] (1) When water injection into the well is required, this solution first detects the oil well and analyzes the amount of water needed at the well location. The controller is then set, and the upper and lower interfaces are connected to the external equipment. The device is placed into the scaled well and moved to the designated position within the well. The servo motor is then powered on, and the external equipment injects water into the outer casing. Water flows from the two holes on the first disc through the second and first guide pipes into the hollow column. Powering on the servo motor causes its output to rotate, which in turn drives the shaft to rotate. The rotation of the shaft drives the rotation of the second and first wheels. The rotation of the first and second rotating wheels drives the rotation of two lead screws, which in turn causes the hollow column to move downwards. During this movement, the descent of the first disc is synchronized and stable, preventing the hollow column from tilting. The downward movement of the hollow column also causes the movable water nozzle to move downwards. When the movable water nozzle reaches contact with the lower inner wall of the chute, the motor stops working, allowing the movable water nozzle to connect with the water outlet. The water injected into the hollow column is then pumped out quantitatively by a water pump under the control of the electronic controller, injecting the water into the well. This achieves quantitative water injection into the oil layer, ultimately simplifying the water injection operation for scaled wells, improving water injection efficiency, and reducing costs.

[0023] (2) The first disc is conducive to fixing the lifting mechanism, the lifting mechanism is conducive to controlling the movement of the moving water nozzle, the hollow column is conducive to fixing the water injection mechanism, the water injection mechanism is conducive to controlling the amount of water injected, the pressure reducing mechanism is conducive to reducing the pressure of the lifting mechanism, making the lifting mechanism more stable during operation, the second limit block and the first limit block are conducive to limiting the space for movement of the second guide pipe and the first guide pipe, so that the first guide pipe and the second guide pipe will not move excessively, thereby separating the first guide pipe and the second guide pipe, and the sealing ring is conducive to sealing the water outlet hole, so that when the device is lowered into the well, the liquid in the well will not flow into the outer shell. Attached Figure Description

[0024] Figure 1 This is a perspective view of a split-type concentric water distributor for use in a scaling well according to the present invention;

[0025] Figure 2 This is a schematic diagram of a split-type concentric water distributor for use in a scaling well according to the present invention;

[0026] Figure 3 This is a partial structural diagram of a split-type concentric water distributor for use in scaling wells according to the present invention;

[0027] Figure 4 This is a three-dimensional sectional view of a split-type concentric water distributor for use in a scaling well according to the present invention;

[0028] Figure 5 This invention relates to a split-type concentric water distributor for use in scaled wells. Figure 4 Enlarged view of point A in the middle;

[0029] Explanation of the labels in the diagram:

[0030] 1. Outer shell; 2. Water outlet; 3. Lower interface; 4. Upper interface; 5. Frustum; 6. First disc; 7. Motor housing; 8. Servo motor; 9. Annular fixing block; 10. Slide groove; 11. Sealing ring; 12. Telescopic rod; 13. Second disc; 14. First limit block; 15. Water pump; 16. Electronic controller; 17. Spring; 18. First guide pipe; 19. Second guide pipe; 20. Threaded sleeve; 21. Lead screw; 22. Rotating shaft; 23. Hollow column; 24. First wheel; 25. Second limit block; 26. First belt; 27. Second wheel; 28. Second belt; 29. ​​Movable water nozzle; 30. Water inlet. Detailed Implementation

[0031] Example:

[0032] Please see Figure 1-5A split-type concentric water distributor for use in scaling wells includes a housing 1. A first disc 6 is fixedly connected to the inner circumference of the housing 1. Two first circular holes are opened at the upper end of the first disc 6. A lifting mechanism is provided on the lower side of the first disc 6. A sliding groove 10 is provided on the lower side of the lifting mechanism. A hollow column 23 is provided in the sliding groove 10. A water injection mechanism is provided in the hollow column 23. A second disc 13 is fixedly connected to the inner circumference of the housing 1. A pressure reducing mechanism is provided on the upper side of the second disc 13. Sliding grooves 10 are opened on both the left and right inner walls of the housing 1. A water outlet 2 is opened at the right end of both sliding grooves 10.

[0033] In this embodiment, the outer shell 1 helps protect the internal structure of the device and increases its service life. The water outlet 2 facilitates the injection of water into the well. The first disc 6 helps fix the lifting mechanism, which in turn helps control the movement of the movable water nozzle. The hollow column 23 helps fix the water injection mechanism, which in turn helps control the amount of water injected. The second disc 13 helps fix the pressure reducing mechanism, which in turn reduces the pressure on the lifting mechanism, making the lifting mechanism more stable during operation. The slide groove 10 facilitates the movement of the movable water nozzle 29 and the opening of the water outlet 2.

[0034] For details, please refer to Figure 2 The lifting mechanism includes a servo motor 8, two second guide pipes 19, two threaded sleeves 20, two lead screws 21, a rotating shaft 22, two first rotating wheels 24, a first belt 26, two second rotating wheels 27, and a second belt 28. The servo motor 8 is fixedly connected to the lower end of the first disc 6. The two second guide pipes 19 are both fixedly connected to the lower end of the first disc 6 and are respectively connected to the two first circular holes. The two first guide pipes 18 are both fixedly connected to the upper end of the hollow column 23 and pass through the hollow column 23. The two second guide pipes 19 are respectively slidably connected to the two first guide pipes 18. The two threaded sleeves 20 are both fixedly connected to the lower end of the first disc 6. The two lead screws 21... All are fixedly connected to the upper end of the hollow column 23, and the two lead screws 21 are respectively threaded into the threaded sleeve 20. The rotating shaft 22 is fixedly connected to the output end of the servo motor 8, and the lower end of the rotating shaft 22 is rotatably connected to the upper end of the hollow column 23. The two first rotating wheels 24 are respectively fixedly connected to the circumferential surface of one of the lead screws 21 and the circumferential surface of the rotating shaft 22, and the two first rotating wheels 24 are connected by a first belt 26. The two second belts 28 are respectively fixedly connected to the circumferential surface of the rotating shaft 22 and the circumferential surface of the other lead screw 21, and the two second rotating wheels 27 are connected by a second belt 28.

[0035] In this embodiment, the lifting mechanism includes a servo motor 8, two second guide pipes 19, two threaded sleeves 20, two lead screws 21, a rotating shaft 22, two first rotating wheels 24, a first belt 26, two second rotating wheels 27, and a second belt 28. The servo motor 8 is fixedly connected to the lower end of the first disc 6. The servo motor 8 provides power to this device. Different models of the servo motor 8 can be selected according to actual needs. The servo motor 8 is electrically connected to an external power supply. For those skilled in the art, The servo motor 8 is existing technology and will not be described in detail. Two second guide tubes 19 are fixedly connected to the lower end of the first disk 6, and each second guide tube 19 communicates with one of the two first circular holes. Two first guide tubes 18 are fixedly connected to the upper end of the hollow column 23 and pass through the hollow column 23. The two second guide tubes 19 are slidably connected to the two first guide tubes 18. Two threaded sleeves 20 are fixedly connected to the lower end of the first disk 6. Two lead screws 21 are fixedly connected to the upper end of the hollow column 23, and the two lead screws 21 are... The shaft 22 is fixedly connected to the output end of the servo motor 8 via a threaded connection to the threaded sleeve 20, and the lower end of the shaft 22 is rotatably connected to the upper end of the hollow column 23. The two first rotating wheels 24 are respectively fixedly connected to the circumferential surface of one of the lead screws 21 and the circumferential surface of the shaft 22, and the two first rotating wheels 24 are connected by a first belt 26. The two second belts 28 are respectively fixedly connected to the circumferential surface of the shaft 22 and the circumferential surface of the other lead screw 21, and the two second rotating wheels 27 are connected by a second belt 28.

[0036] For details, please refer to Figure 5 The inner circumferential walls of the two first guide tubes 18 are fixedly connected with second limiting blocks 25, and the circumferential surfaces of the two second guide tubes 19 are fixedly connected with first limiting blocks 14.

[0037] In this embodiment, the second limiting block 25 and the first limiting block 14 help to restrict the space for movement of the second guide tube 19 and the first guide tube 18, so that the first guide tube 18 and the second guide tube 19 will not move excessively, thereby separating the first guide tube 18 and the second guide tube 19.

[0038] For details, please refer to Figure 3 and Figure 4The injection mechanism includes an annular fixing block 9, two water pumps 15, two electronic controllers 16, two movable water nozzles 29, and two water inlets 30. The annular fixing block 9 is fixedly connected to the circumferential surface of the hollow column 23. The two water pumps 15 are respectively fixedly connected to the lower end of the annular fixing block 9. The two electronic controllers 16 are respectively fixedly connected to the right end of the two water pumps 15. The two movable water nozzles 29 are respectively fixedly connected to the front and rear ends of the two water pumps 15, and the two movable water nozzles 29 pass through the front and rear ends of the hollow column 23. The two water inlets 30 are respectively fixedly connected to the upper end of the two water pumps 15, and the two water pumps 15 pass through the upper end of the annular fixing block 9.

[0039] In this embodiment, the injection mechanism includes an annular fixing block 9, two water pumps 15, two electronic controllers 16, two movable water nozzles 29, and two water inlets 30. The annular fixing block 9 is fixedly connected to the circumferential surface of the hollow column 23. The two water pumps 15 are respectively fixedly connected to the lower end of the annular fixing block 9. The two electronic controllers 16 are respectively fixedly connected to the right end of the two water pumps 15. The two movable water nozzles 29 are respectively fixedly connected to the front and rear ends of the two water pumps 15, and the two movable water nozzles 29 pass through the front and rear ends of the hollow column 23. The two water inlets 30 are respectively fixedly connected to the upper end of the two water pumps 15, and the two water pumps 15 pass through the upper end of the annular fixing block 9. The water pumps 15 and the electronic controllers 16 are existing technologies and will not be described in detail.

[0040] For details, please refer to Figure 4 The pressure relief mechanism includes four telescopic rods 12 and four springs 17. The four telescopic rods 12 are all fixedly connected to the upper end of the second disc 13 and are evenly distributed. The four springs 17 are all sleeved on the circumferential surface of the telescopic rods 12.

[0041] In this embodiment, the pressure-reducing mechanism includes four telescopic rods 12 and four springs 17. The four telescopic rods 12 are all fixedly connected to the upper end of the second disc 13 and are evenly distributed. The four springs 17 are all sleeved on the circumferential surface of the telescopic rods 12.

[0042] For details, please refer to Figure 4 A sealing ring 11 is fixedly connected to the lower end of the hollow column 23.

[0043] In this embodiment, the sealing ring 11 helps to seal the water outlet 2, so that when the device is lowered into the well, the liquid in the well will not flow into the outer casing 1.

[0044] For details, please refer to Figure 1 Both the upper and lower ends of the outer shell 1 are fixedly connected to a frustum 5, and the two frustums 5 are respectively fixedly connected to an upper interface 4 and a lower interface 3.

[0045] In this embodiment, the frustum 5 facilitates the fixing of the upper interface 4 and the lower interface 3, and the upper interface 4 and the lower interface 3 facilitate docking with external devices.

[0046] Specifically, please refer to the figure. The lower end of the first disc 6 is fixedly connected to the motor housing 7, and the servo motor 8 is fixedly installed inside the motor housing 7.

[0047] In this embodiment, the motor housing 7 helps to protect the servo motor 8 and also helps to fix the servo motor 8, making the servo motor 8 more stable during operation.

[0048] Specifically, please refer to the figure. Both water outlets 2 are equipped with filter screens.

[0049] In this embodiment, the filter screen helps prevent mud and sand from entering the device, thus protecting the internal structure of the device.

[0050] Specifically, please refer to the figure. Both inner walls of the two slides 10 are bonded with sealing rubber rings.

[0051] In this embodiment, the sealing rubber ring helps prevent water from flowing into the upper end of the hollow column 23 and prevents the lifting mechanism from being corroded.

[0052] Working principle: First, the oil well is inspected to determine the required water injection volume at the desired location. The electronic controller 16 is then set. Next, the upper interface 4 and lower interface 3 are connected to external equipment. The device is placed into the scaled well and moved to the designated position. The servo motor 8 is then energized, and the external equipment injects water into the outer casing 1. Water flows from the two circular holes on the first disc 6 through the second guide pipe 19 and the first guide pipe 18 into the hollow column 23. Inside, the servo motor 8 is energized, causing its output to rotate. This rotation drives the shaft 22 to rotate, which in turn drives the second wheel 27 and the first wheel 24. The rotation of the first wheel 24 and the second wheel 27 drives the two lead screws 21 to rotate, which in turn causes the hollow column 23 to move downwards. The two lead screws and the shaft ensure the synchronous and stable descent of the first disc during the movement, preventing the hollow column from tilting. The downward movement of the hollow column 23 also causes the movable water nozzle 29 to move downwards. When the movable water nozzle 29 moves down to contact the lower inner wall of the chute 10, the motor stops working, allowing the movable water nozzle 29 to connect with the water outlet 2. The water injected into the hollow column 23 is then pumped out quantitatively by the water pump 15 under the control of the electronic controller 16, injecting the water into the well and achieving quantitative water injection into the oil layer.

Claims

1. A split-type concentric water distributor for use in scaled wells, comprising a housing, characterized in that: The outer shell is fixedly connected to the inner circumference of the first disk, and the upper end of the first disk has two first circular holes. A lifting mechanism is provided on the lower side of the first disk. The lower side of the lifting mechanism is provided with a sliding groove, and a hollow column is provided in the sliding groove; A water injection mechanism is provided inside the hollow column, and a second disc is fixedly connected to the inner circumference of the outer shell. A pressure-reducing mechanism is provided on the upper side of the second disc, and grooves are provided on the left and right inner walls of the outer shell, with water outlets provided at the right ends of the two grooves. The lifting mechanism includes a servo motor, two second guide tubes, two threaded sleeves, two lead screws, a rotating shaft, two first rotating wheels, a first belt, two second rotating wheels, and a second belt. The servo motor is fixedly connected to the lower end of the first disc. The two second guide tubes are both fixedly connected to the lower end of the first disc and are respectively connected to the two first circular holes. The two first guide tubes are both fixedly connected to the upper end of the hollow column and pass through the hollow column. The two second guide tubes are respectively slidably connected to the two first guide tubes. The two threaded sleeves are both fixedly connected to the lower end of the first disc. The two lead screws are both fixedly connected to the upper end of the hollow column and are respectively threadedly connected to the threaded sleeves. The rotating shaft is a telescopic sleeve. The two parts of the rotating shaft cannot rotate relative to each other. The rotating shaft is fixedly connected to the output end of the servo motor, and the lower end of the rotating shaft is rotatably connected to the upper end of the hollow column. The two first rotating wheels are respectively fixedly connected to the circumferential surface of one of the lead screws and the circumferential surface of the rotating shaft. A first belt is connected between the two first rotating wheels. The two second belts are respectively fixedly connected to the circumferential surface of the rotating shaft and the circumferential surface of the other lead screw. A second belt is connected between the two second rotating wheels. A second limiting block is fixedly connected to the inner circumferential wall of each of the two first guide tubes, and a first limiting block is fixedly connected to the circumferential surface of each of the two second guide tubes. The water injection mechanism includes an annular fixed block, two water pumps, two electronic controllers, two movable water nozzles, and two water inlets. The annular fixed block is fixedly connected to the circumferential surface of the hollow column. The two water pumps are respectively fixedly connected to the lower end of the annular fixed block. The two electronic controllers are respectively fixedly connected to the right end of the two water pumps. The two movable water nozzles are respectively fixedly connected to the front and rear ends of the two water pumps, and the two movable water nozzles pass through the front and rear ends of the hollow column. The two water inlets are respectively fixedly connected to the upper ends of the two water pumps, and the two water pumps pass through the upper end of the annular fixed block. The pressure-reducing mechanism includes four telescopic rods and four springs. The four telescopic rods are all fixedly connected to the upper end of the second disc and are evenly distributed. The four springs are all sleeved on the circumferential surface of the telescopic rods.

2. A split-type concentric water distributor for use in scaling wells according to claim 1, characterized in that: A sealing ring is fixedly connected to the lower end of the hollow column.

3. A split-type concentric water distributor for use in scaling wells according to claim 2, characterized in that: Both the upper and lower ends of the outer shell are fixedly connected to a frustum, and the two frustums are respectively fixedly connected to an upper interface and a lower interface.

4. A split-type concentric water distributor for use in scaling wells according to claim 3, characterized in that: The lower end of the first disk is fixedly connected to a motor housing, and the servo motor is fixedly installed inside the motor housing.

5. A split-type concentric water distributor for use in scaling wells according to claim 4, characterized in that: Both of the water outlet holes are equipped with filter screens.

6. A split-type concentric water distributor for use in scaling wells according to claim 5, characterized in that: Both of the upper inner walls of the slides are bonded with sealing rubber rings.

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