Low-cost intelligent integrated water distributor

Abstract

The invention relates to the technical field of oil field oil production engineering, in particular to a low-cost intelligent integrated water distributor which comprises a main body, the two sides of the main body are connected with an upper connector and a well washing valve respectively, and a flowmeter, a first-layer control valve, a second-layer control valve, a flow measurement switching piston and a piston control mechanism are installed in the main body in an embedded mode. The middle of the tail end of the upper connector is connected with a flowmeter and an overflowing channel, the top end of the flowmeter is provided with a first-layer control valve, the bottom end of the overflowing channel is provided with a second-layer control valve, the flowmeter and the overflowing channel are jointly connected with a flow measurement switching piston, the flow measurement switching piston is connected with a piston control mechanism, and the second-layer control valve is connected with a second-layer water injection channel. The second-layer water injection channel is connected with a well washing valve, the bottom end of the well washing valve is sequentially connected with a setting rubber sleeve and a setting mechanism, and the tail end of the well washing valve is sequentially connected with a cable channel and a lower connector. According to the water distributor, the application range of the layered water injection technology is widened, and the average single-layer application cost of the intelligent water distributor is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of oilfield production engineering, and in particular to a low-cost intelligent integrated water distributor. Background Technology

[0002] As oilfield development progresses, it becomes necessary to replenish the formation with energy. A widely used method is water injection, also known as water displacement. Oil accumulates underground in the form of oil-bearing layers. To achieve precise development, these layers are typically divided into several target layers for further water injection.

[0003] A water distributor is a tool for injecting water into a formation. When used with a packer, it can inject water into different formations separately. Traditional water distributors need to be used with wireline or electronically controlled high-efficiency measurement and adjustment to measure and adjust the water injection volume layer by layer in the well. It takes an average of 3.10 days to complete the measurement and adjustment of a 7-layer water injection well.

[0004] The intelligent water distributor integrates a flow meter, pressure sensor, and control valve assembly to monitor downhole production parameters and transmit these parameters to the surface via wired or wireless means. This significantly improves measurement and adjustment efficiency; completing the measurement and adjustment of a subdivided injection well using an intelligent water distributor typically takes no more than 2 hours. However, the integration of numerous sensors results in a high cost per intelligent water distributor, hindering its large-scale application. Therefore, to address these shortcomings, this invention provides a low-cost intelligent integrated water distributor. Summary of the Invention

[0005] The purpose of this invention is to provide a low-cost intelligent integrated water distributor, in order to solve the shortcomings of existing intelligent injectors with excessively large water injection intervals and high costs, which prevent the large-scale promotion and application of intelligent water distributors.

[0006] To achieve the above objectives, the present invention provides a low-cost intelligent integrated water distributor, comprising: The main body has an upper connector and a well-washing valve connected to its two sides respectively. The main body has a flow passage and a second-layer water injection passage inside. The main body also has a flow meter, a first-layer control valve, a second-layer control valve, a flow measurement switching piston, and a piston control mechanism embedded inside. The upper connector is connected to a flow meter and a flow channel at its middle end. The bottom end of the flow meter is the flow channel, the top end of the flow meter is the first-level control valve, and the bottom end of the flow channel is the second-level control valve. The tail end of the first-level control valve is provided with a first-level injection hole. The tail end of the flow meter and the tail end of the flow channel are connected to a flow measurement switching piston. The tail end of the flow measurement switching piston is connected to a piston control mechanism. The tail end of the second-level control valve is connected to a second-level water injection channel. The tail end of the second-level water injection channel is connected to a well-washing valve. The bottom end of the well-washing valve is connected to a setting rubber sleeve. The tail end of the setting rubber sleeve is connected to a setting mechanism. The tail end of the well-washing valve is connected to a cable channel. The tail end of the cable channel is connected to the lower connector.

[0007] Preferably, a first-layer control valve is embedded at the top of one side of the main body, a flow meter is embedded in the middle of one side of the main body, a second-layer control valve is embedded at the tail end of one side of the main body, a flow passage is provided between the flow meter and the second-layer control valve, and a second-layer water injection passage is provided at the tail end of the other side of the main body.

[0008] Preferably, a flow measurement switching piston and a piston control mechanism are embedded in the middle of the main body, and the upper end of the second layer water injection channel is the flow measurement switching piston and the piston control mechanism.

[0009] Preferably, the first layer control valve has a water inlet end, and the water inlet end of the first layer control valve is connected to a flow measurement switching piston.

[0010] Preferably, the second-layer control valve has a water inlet end, and the water inlet end of the second-layer control valve is connected to a flow switching piston.

[0011] Preferably, the piston control mechanism is equipped with an electronic controller, which controls the flow measurement switching piston to change its measurement direction.

[0012] Preferably, a second-layer water injection and well-washing channel outlet reuse hole is provided between the setting seal rubber cylinder and the well-washing valve, and the second-layer water injection and well-washing channel outlet reuse hole is connected to the second-layer water injection channel.

[0013] Preferably, the bottom end of the well-washing valve is the well-washing channel inlet, the side of the well-washing channel inlet is a sealing rubber sleeve, and one side of the well-washing channel inlet is connected to a reuse hole for the second layer of water injection and the well-washing channel outlet.

[0014] Preferably, the well-washing valve is a movable mechanism, which opens and closes the well-washing channel entrance by moving.

[0015] Preferably, the setting mechanism compresses the setting rubber cylinder by movement, and the setting rubber cylinder expands through the sealing sleeve.

[0016] The low-cost intelligent integrated water distributor provided by this invention has the following beneficial effects: The low-cost intelligent integrated water distributor provided by this invention has a simple structure, is easy to install and operate. It features an innovative flow meter reuse mechanism and reduces the minimum interlayer spacing required for tool application by setting up a double-layer control valve, further broadening the application scope of stratified water injection technology. This not only reduces the average single-layer application cost of the intelligent water distributor, but also provides technical support for its widespread application, thus helping oilfield development achieve digital transformation and upgrading. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a low-cost intelligent integrated water distributor according to an embodiment of the present invention.

[0018] Legend: 1-Upper connector; 2-Flow meter; 3-Flow passage; 4-First-level control valve; 5-Second-level control valve; 6-First-level water injection hole; 7-Flow measurement switching piston; 8-Main body; 9-Piston control mechanism; 10-Second-level water injection passage; 11-Well washing valve; 12-Well washing passage inlet; 13-Setting rubber sleeve; 14-Second-level water injection and well washing passage outlet reuse hole; 15-Setting mechanism; 16-Cable passage; 17-Lower connector. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Figure 1 This is a schematic diagram of the low-cost intelligent integrated water distributor according to an embodiment of the present invention, with reference to... Figure 1 The present invention provides a low-cost intelligent integrated water distributor, comprising: The main body 8 has a connector 1 and a well-washing valve 11 connected to its two sides respectively. The main body 8 has a flow passage 3 and a second-layer water injection passage 10 inside. The main body 8 also has a flow meter 2, a first-layer control valve 4, a second-layer control valve 5, a flow measurement switching piston 7, and a piston control mechanism 9 embedded inside. The upper connector 1 is connected to the flow meter 2 and the flow channel 3 at the middle of its tail end. The bottom end of the flow meter 2 is the flow channel 3, the top end of the flow meter 2 is the first layer control valve 4, and the bottom end of the flow channel 3 is the second layer control valve 5. The tail end of the first layer control valve 4 is provided with a first layer injection hole 6. The tail end of the flow meter 2 and the tail end of the flow channel 3 are connected to a flow measurement switching piston 7. The tail end of the flow measurement switching piston 7 is connected to a piston control mechanism 9. The tail end of the second layer control valve 5 is connected to a second layer water injection channel 10. The tail end of the second layer water injection channel 10 is connected to a well washing valve 11. The bottom end of the well washing valve 11 is connected to a setting rubber sleeve 13. The tail end of the setting rubber sleeve 13 is connected to a setting mechanism 15. The tail end of the well washing valve 11 is connected to a cable channel 16. The tail end of the cable channel 16 is connected to a lower connector 17.

[0021] In practical applications, a first-layer control valve 4 is embedded at the top of one side of the main body 8, a flow meter 2 is embedded in the middle of one side of the main body 8, a flow measurement switching piston 7 and a piston control mechanism 9 are embedded in the middle of the main body 8, a second-layer control valve 5 is embedded at the tail end of one side of the main body 8, a flow passage 3 is provided between the flow meter 2 and the second-layer control valve 5, and a second-layer water injection channel 10 is provided at the tail end of the other side of the main body 8, with the flow measurement switching piston 7 and the piston control mechanism 9 at the upper end of the second-layer water injection channel 10.

[0022] In this integrated water distributor, the first-level control valve 4 is provided with a water inlet end, and the water inlet end of the first-level control valve 4 is connected to the flow measurement switching piston 7; the second-level control valve 5 is provided with a water inlet end, and the water inlet end of the second-level control valve 5 is connected to the flow measurement switching piston 7. In practical applications, the piston control mechanism 9 is equipped with an electric controller inside, and the piston control mechanism 9 controls the measurement direction of the flow measurement switching piston 7 through the electric controller.

[0023] In practical applications, a second-layer water injection and well-washing channel outlet reuse hole 14 is provided between the setting rubber sleeve 13 and the well-washing valve 11. In this integrated water distributor, the bottom end of the well-washing valve 11 is the well-washing channel inlet 12, the side of the well-washing channel inlet 12 is the setting rubber sleeve 13, one side of the well-washing channel inlet 12 is connected to the second-layer water injection and well-washing channel outlet reuse hole 14, and the second-layer water injection and well-washing channel outlet reuse hole 14 is connected to the second-layer water injection channel 10. In addition, the well-washing valve 11 is a movable mechanism, and the well-washing valve 11 opens and closes the well-washing channel inlet 12 by moving.

[0024] It should be noted that the setting mechanism 15 compresses the setting rubber cylinder 13 through movement, and the setting rubber cylinder 13 expands the sealing sleeve.

[0025] In this integrated water distributor, the upper connector 1 connects the flow meter 2 and the flow channel 3. The other end of the flow meter 2 and the flow channel 3 are connected to the flow measurement switching piston 7. Different positions of the flow measurement switching piston 7 are connected to the inlet of the first layer control valve 4 and the second layer control valve 5, respectively. The action of the flow measurement switching piston 7 is controlled by the electrically controlled piston control mechanism 9.

[0026] In practical applications, this integrated water distributor can also achieve a dual-layer water injection function. After passing through the first layer control valve 4, it enters the first layer of formation through the first layer water injection hole 6; after passing through the second layer control valve 5, it flows through the second layer water injection channel 10, and finally enters the second layer of formation through the second layer water injection and well washing channel outlet reuse hole 14.

[0027] In this integrated water distributor, the sealing function is achieved by the action of the setting mechanism 15 to compress the setting rubber cylinder 13, causing the setting rubber cylinder 13 to expand; the well washing function is achieved by the action of the well washing valve 11, which enters through the well washing channel inlet 12, passes over the setting rubber cylinder 13, and flows out from the second layer water injection and well washing channel outlet reuse hole 14.

[0028] In practical applications, cost analysis of the internal components of water distributors reveals that the flow meter accounts for a significant portion of the overall cost, typically 30% to 40% of the total cost. This invention provides a low-cost intelligent integrated water distributor that addresses the issue of excessively high costs. Simultaneously, it enables precise intelligent water injection with a minimum 2-meter interlayer spacing. The working principle of this low-cost intelligent integrated water distributor is described in detail below: In this embodiment, a first-layer control valve 4 is embedded at the top of one side of the main body 8, a flow meter 2 is embedded in the middle of one side of the main body 8, a flow measurement switching piston 7 and a piston control mechanism 9 are embedded in the middle of the main body 8, a second-layer control valve 5 is embedded at the tail end of one side of the main body 8, a flow passage 3 is provided between the flow meter 2 and the second-layer control valve 5, and a second-layer water injection channel 10 is provided at the tail end of the other side of the main body 8, with the flow measurement switching piston 7 and the piston control mechanism 9 at the upper end of the second-layer water injection channel 10.

[0029] In practical applications, the middle of the upper connector 1 connects the flow meter 2 and the flow channel 3. The bottom of the flow meter 2 is the flow channel 3, the top of the flow meter 2 is the first-level control valve 4, and the bottom of the flow channel 3 is the second-level control valve 5. The tail end of the first-level control valve 4 is provided with a first-level injection hole 6. The tail ends of the flow meter 2 and the flow channel 3 are connected to a flow measurement switching piston 7. The tail end of the flow measurement switching piston 7 is connected to a piston control mechanism 9. The tail end of the second-level control valve 5 is connected to the second-level water injection channel 10. The tail end of the second-level water injection channel 10... The well washing valve 11 is connected to the end of the well washing valve 11. The bottom end of the well washing valve 11 is the well washing channel inlet 12. The side of the well washing channel inlet 12 is the setting seal rubber cylinder 13. A second layer water injection and well washing channel outlet reuse hole 14 is provided between the setting seal rubber cylinder 13 and the well washing valve 11. The second layer water injection and well washing channel outlet reuse hole 14 is connected to the second layer water injection channel 10. The bottom end of the well washing valve 11 is connected to the setting seal rubber cylinder 13. The tail end of the setting seal rubber cylinder 13 is connected to the setting mechanism 15. The tail end of the well washing valve 11 is connected to the cable channel 16. The tail end of the cable channel 16 is connected to the lower connector 17.

[0030] In practical applications, this integrated water distributor can simultaneously control the injection of water into two subdivided sections, which are separated by a sealing rubber sleeve 13.

[0031] In practical applications, after the integrated water distributor is lowered into the tubing, the first layer control valve 4 and the second layer control valve 5 are closed, and pressure is applied to the tubing at the wellhead. The setting mechanism 15 compresses the setting rubber cylinder 13, causing it to expand, thereby achieving the isolation of the subdivided sections, that is, achieving setting.

[0032] In actual production, the well washing process refers to the process in which clean water enters the wellbore through the casing, reaches the bottom of the tubing string, passes through the one-way valve at the end of the tubing string, and returns to the wellhead through the casing, carrying out impurities in the well. In order to achieve well washing, after setting, the casing space corresponding to different water injection layers is sealed by the setting rubber sleeve 13. Therefore, a well washing mechanism must be provided on this integrated water distributor to complete the well washing process.

[0033] In this embodiment, the well washing mechanism consists of a well washing valve 11, a well washing channel inlet 12, and a second-layer water injection and well washing channel outlet reuse hole 14. When the well washing process begins, the first-layer control valve 4 and the second-layer control valve 5 are closed, and pressure is applied to the casing to push the well washing valve 11 to the left. The well washing channel inlet 12 is opened, and the well washing water enters from the well washing channel 12 and flows out through the second-layer water injection and well washing channel outlet reuse hole 14 into the lower layer, thus achieving well washing.

[0034] In practical applications, this integrated water distributor can also achieve a double-layer water injection function. In this embodiment, during normal water injection, the water injection pressure is greater than the casing pressure, which pushes the well washing valve 11 to the right, closes the well washing channel inlet 12, and prevents the casing water from passing through the setting seal sleeve 13, thus re-establishing the double-layer formation isolation.

[0035] Next, when injecting water into the first formation, the water enters the first formation through the first-layer control valve 4, the flow measurement switching piston 7, and the first-layer water injection hole 6; when injecting water into the second formation, the water enters the second formation through the second-layer control valve 5, the flow measurement switching piston 7, and the second-layer water injection and well washing channel outlet reuse hole 14, passing over the setting seal sleeve 13, thereby realizing separate water injection into the two formations.

[0036] In addition, this integrated water distributor can also perform time-sharing measurement of the flow rate in the two-layer formation, as follows: In this embodiment, when measuring the flow rate of the first formation, the piston control mechanism 9 controls the flow measurement switching piston 7 to move to the left. At this time, the water passing through the first layer control valve 4 comes from the flow meter 2, and the water passing through the second layer control valve 5 comes from the flow passage 3, so as to measure the flow rate of the first formation without affecting the water injection status of the second formation.

[0037] In practical applications, when measuring the flow rate of the second formation, the piston control mechanism 9 controls the flow measurement switching piston 7 to move to the right. At this time, the water passing through the first layer control valve 4 comes from the flow passage 3, and the water passing through the second layer control valve 5 comes from the flow meter 2, so as to measure the flow rate of the second formation without affecting the water injection status of the first formation.

[0038] In this embodiment, the two sets of intelligent water distributors and one set of cable packers required for completing the double-layer formation water injection are integrated together. Through the innovative design of the flow meter reuse mechanism, the water injection volume of the two injection layers can be measured with one flow meter. In addition, the four pressure sensors required for the two sets of intelligent water distributors are reduced to three.

[0039] In practical applications, the above method can reduce the average single-layer application cost of the intelligent water distributor by more than 16%. At the same time, since the structures of the two water distributors are integrated together, the minimum subdivision spacing of the tool can be reduced to less than 2 meters.

[0040] The low-cost intelligent integrated water distributor provided by this invention has a simple structure, is easy to install and operate. It features an innovative flow meter reuse mechanism and reduces the minimum interlayer spacing required for tool application by setting up a double-layer control valve, further broadening the application scope of stratified water injection technology. This not only reduces the average single-layer application cost of the intelligent water distributor, but also provides technical support for its widespread application, thus helping oilfield development achieve digital transformation and upgrading.

[0041] Finally, it should be noted that the above description is only 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 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A low-cost intelligent integrated water distributor, characterized in that, include: The main body (8) is connected to the upper connector (1) and the well washing valve (11) on both sides respectively. The main body (8) is provided with a flow passage (3) and a second layer water injection passage (10). The main body (8) is embedded with a flow meter (2), a first layer control valve (4), a second layer control valve (5), a flow measurement switching piston (7) and a piston control mechanism (9). The upper connector (1) is connected to the flow meter (2) and the flow channel (3) at the middle of its tail end. The bottom end of the flow meter (2) is the flow channel (3), the top end of the flow meter (2) is the first layer control valve (4), and the bottom end of the flow channel (3) is the second layer control valve (5). The tail end of the first layer control valve (4) is provided with a first layer injection hole (6). The tail end of the flow meter (2) and the tail end of the flow channel (3) are connected to a flow measurement switching piston (7). The tail end of the piston (7) is connected to the piston control mechanism (9), the tail end of the second layer control valve (5) is connected to the second layer water injection channel (10), the tail end of the second layer water injection channel (10) is connected to the well washing valve (11), the bottom end of the well washing valve (11) is connected to the setting rubber cylinder (13), the tail end of the setting rubber cylinder (13) is connected to the setting mechanism (15), the tail end of the well washing valve (11) is connected to the cable channel (16), and the tail end of the cable channel (16) is connected to the lower connector (17).

2. The low-cost intelligent integrated water distributor according to claim 1, characterized in that, The first layer control valve (4) is embedded at the top of one side of the main body (8), the flow meter (2) is embedded in the middle of one side of the main body (8), the second layer control valve (5) is embedded at the tail end of one side of the main body (8), a flow passage (3) is provided between the flow meter (2) and the second layer control valve (5), and a second layer water injection passage (10) is provided at the tail end of the other side of the main body (8).

3. The low-cost intelligent integrated water distributor according to claim 2, characterized in that, The flow measurement switching piston (7) and piston control mechanism (9) are embedded in the middle of the main body (8), and the flow measurement switching piston (7) and piston control mechanism (9) are located at the upper end of the second layer water injection channel (10).

4. The low-cost intelligent integrated water distributor according to claim 1, characterized in that, The first layer control valve (4) is provided with a water inlet end, and the water inlet end of the first layer control valve (4) is connected to the flow measurement switching piston (7).

5. The low-cost intelligent integrated water distributor according to claim 1, characterized in that, The second layer control valve (5) is provided with an inlet end, and the inlet end of the second layer control valve (5) is connected to the flow switching piston (7).

6. The low-cost intelligent integrated water distributor according to claim 1, characterized in that, The piston control mechanism (9) is equipped with an electronic controller, which controls the flow measurement switching piston (7) to change its measurement direction via the electronic controller.

7. The low-cost intelligent integrated water distributor according to claim 1, characterized in that, A second-layer water injection and well washing channel outlet reuse hole (14) is provided between the setting seal rubber cylinder (13) and the well washing valve (11), and the second-layer water injection and well washing channel outlet reuse hole (14) is connected to the second-layer water injection channel (10).

8. The low-cost intelligent integrated water distributor according to claim 7, characterized in that, The bottom end of the well washing valve (11) is the well washing channel inlet (12), the side of the well washing channel inlet (12) is the setting seal rubber cylinder (13), and one side of the well washing channel inlet (12) is connected to the second layer water injection and well washing channel outlet reuse hole (14).

9. The low-cost intelligent integrated water distributor according to claim 8, characterized in that, The well-washing valve (11) is a movable mechanism, which opens and closes the well-washing channel entrance (12) by moving.

10. The low-cost intelligent integrated water distributor according to claim 1, characterized in that, The setting mechanism (15) compresses the setting rubber cylinder (13) by movement, and the setting rubber cylinder (13) expands the sealing sleeve.

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