Intelligent control device for high-pressure water injection well

Abstract

The utility model relates to an intelligent control device for a high-pressure water injection well. The intelligent control device for the high-pressure water injection well comprises a control pipeline, a flow meter, an electric actuating mechanism and two pressure transmitters, the flow meter, the electric actuating mechanism and the pressure transmitters are arranged on the control pipeline, and the flow meter and the electric actuating mechanism are located between the two pressure transmitters. According to the intelligent control device for the high-pressure water injection well, the two measuring points are arranged in front of the electric executing mechanism to obtain more accurate detection data, and meanwhile the measuring point is arranged behind the electric executing mechanism to determine a flow adjusting result and improve the stability of flow adjusting.

Description

Technical Field

[0001] The present application relates to the technical field of industrial production equipment, and in particular to an intelligent control device for high-pressure water injection wells. Background Art

[0002] The basic principle of constant flow control is to maintain a constant flow rate around a set value by adjusting the resistance or power source in the system (such as pump speed or valve opening). This control can be achieved based on various physical principles and technical means, such as PID control, vector control, and predictive control.

[0003] In oil field high-pressure water injection, water seepage, and polymer injection, the pressure in the pipeline is relatively high. Therefore, the problem with the existing technology is that it is easy to cause fluctuations when performing fine-tuning, and when the fluctuations are large, it will cause the actuator to move repeatedly. Utility Model Content

[0004] The present application provides an intelligent control device for a high-pressure water injection well, in which two measuring points are deployed in front of the electric actuator to obtain more accurate detection data, and a measuring point is deployed behind the electric actuator to determine the flow adjustment result, so as to improve the stability of the flow regulation.

[0005] The above-mentioned purpose of this application is achieved through the following technical solutions:

[0006] In a first aspect of the present application, there is provided an intelligent control device for a high-pressure water injection well, comprising:

[0007] Control pipelines;

[0008] The flow meter, electric actuator and pressure transmitter are all installed on the control pipeline;

[0009] There are two pressure transmitters, and the flow meter and the electric actuator are located between the two pressure transmitters.

[0010] In a possible implementation of the present application, the flow meter includes:

[0011] a base, connected to the control pipe;

[0012] The frequency detection mechanism has a detection end extending into the base.

[0013] In a possible implementation of the present application, the base includes:

[0014] The base body is connected to the control pipe;

[0015] A cavity is provided inside the base body;

[0016] The detection chamber is located inside the cavity, and there is a gap between the outer wall of the detection chamber and the inner wall of the cavity;

[0017] The base body divides the cavity in the control pipe into a first cavity and a second cavity;

[0018] The first cavity, the detection chamber, the gap between the outer wall of the detection chamber and the inner wall of the cavity, and the second cavity are sequentially connected;

[0019] The detection end of the frequency detection mechanism extends into the detection chamber.

[0020] In a possible implementation of the present application, an interceptor is provided in the detection chamber;

[0021] On a plane perpendicular to the axis of the detection chamber, the projected area of ​​the interceptor is smaller than the flow area of ​​the detection chamber;

[0022] In the flow direction of the medium in the detection chamber, the detection end of the frequency detection mechanism is located behind the interception body.

[0023] In a possible implementation of the present application, a magnet group is provided on the inner wall of the detection chamber;

[0024] The detection end of the frequency detection mechanism is located within the coverage range of the magnet group.

[0025] In a possible implementation of the present application, a line connecting the magnets in the magnet group is perpendicular to the axis of the intercepting body.

[0026] In a possible implementation of the present application, the frequency detection mechanism includes:

[0027] Detection shell, connected to the base;

[0028] A transmission rod is provided in the detection housing, and a first end of the transmission rod extends into the base;

[0029] The main control circuit is located on the detection housing;

[0030] The sensor is provided on the detection housing and is electrically connected to the main control circuit, and the probe rod of the sensor extends into the blind hole on the second end of the transmission rod;

[0031] The outer wall of the sensor probe rod abuts against the inner wall of the blind hole on the second end of the transmission rod.

[0032] In a possible implementation of the present application, in a direction away from the transmission rod, the diameter of the probe rod of the sensor first tends to increase and then tends to decrease.

[0033] The beneficial effects of this application are:

[0034] The high-pressure water injection well intelligent control device provided in this application deploys two measuring points in front of the electric actuator for data acquisition and data verification, and at the same time deploys a measuring point behind the electric actuator to determine the flow adjustment result to ensure that the error between the flow adjustment result and the set flow is within the allowable range. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings, in which:

[0036] Figure 1 This is a schematic diagram of the appearance and structure of a high-pressure water injection well intelligent control device provided in this application.

[0037] Figure 2 This is a schematic diagram of the internal structure of a high-pressure water injection well intelligent control device provided in this application.

[0038] Figure 3 This is a structural schematic diagram of a flow meter provided in this application.

[0039] Figure 4 This is a structural schematic diagram of a base provided in this application.

[0040] Figure 5 It is a structural schematic diagram of a frequency detection mechanism provided by this application.

[0041] In each of the accompanying drawings, the same or corresponding reference numerals represent the same or corresponding parts; wherein the reference numerals are: 1. control pipe, 2. flow meter, 3. electric actuator, 4. pressure transmitter, 101. first cavity, 102. second cavity, 21. base, 22. frequency detection mechanism, 211. base body, 212. cavity, 213. detection chamber, 214. intercepting body, 215. magnet group, 221. detection shell, 222. transmission rod, 223. main control circuit, 224. sensor. DETAILED DESCRIPTION

[0042] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0043] In the description of the embodiments of the present disclosure, the term "including" and similar terms should be understood as open inclusion, that is, "including but not limited to." The term "based on" should be understood as "based at least in part on." The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment." The terms "first," "second," etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0044] This application discloses an intelligent control device for high-pressure water injection wells. Figure 1 and Figure 2 In some examples, the intelligent control device for a high-pressure water injection well disclosed in this application includes a control pipe 1, a flow meter 2, an electric actuator 3, and a pressure transmitter 4. The flow meter 2, electric actuator 3, and pressure transmitter 4 are all deployed on the control pipe 1. There are two pressure transmitters 4, and the flow meter 2 and electric actuator 3 are located between the two pressure transmitters 4.

[0045] The working principle of flow meter 2 is:

[0046] Flow measurement utilizes the principle that when a conductor moves in a magnetic field and cuts through magnetic lines of force, it generates an induced electromotive force. In a flowmeter, a conductive medium (such as a liquid) flows within a pipe. When a magnetic field perpendicular to the flow direction acts on the conductive medium, an electromotive force is induced in the medium. This induced electromotive force is proportional to the flow velocity of the fluid. Therefore, by measuring the magnitude of the induced electromotive force, the flow velocity and flow rate can be inferred.

[0047] The pressure transmitter 4 uses the vortex flow measurement principle for measurement. The working principle is:

[0048] The vortex flowmeter uses the rotating eddy currents generated by the fluid flowing through the pipe to infer the flow rate by detecting the eddy current frequency. The introduction of magnets can make the fluid form more synchronous and stable eddy currents when flowing through the vortex flowmeter, thereby stabilizing the output signal of the flowmeter and reducing measurement errors.

[0049] The pressure transmitter 4 is used to detect the pressure in the control pipe 1 and directly guide the electric actuator 3 to work. The two flow meters 2 are used to detect the flow at the front and rear ends of the electric actuator 3 respectively. The flow at the rear end of the electric actuator 3 should be in a stable state, while the flow at the rear end of the electric actuator 3 is in a stable-fluctuating-stable state.

[0050] That is, there are two measuring points at the front end of the electric actuator 3. The two detection points can compensate for errors, reduce single interference, improve stability and provide early warning, as follows:

[0051] Using two flow measurement points allows for dual detection of fluid flow in the same pipeline. When one measurement point produces an error due to some reason (such as sensor failure, change in fluid characteristics, etc.), the other measurement point can be used as a reference or calibration, thereby reducing the overall measurement error.

[0052] The flow of fluid in a pipeline may be affected by many factors, such as temperature, pressure, flow velocity distribution, etc. Using two measurement points can monitor the flow conditions at different locations or under different conditions respectively, thereby avoiding interference from local factors at a single measurement point and improving the representativeness of the overall measurement.

[0053] When one measuring point fails or fails to work properly, the other measuring point can still continue to work, ensuring the continuity of flow monitoring.

[0054] By comparing the data from the two measurement points, flow anomalies or measurement errors can be discovered in a timely manner, thus providing early warning.

[0055] For some examples, see Figure 3 The flowmeter 2 includes a base 21 and a frequency detection mechanism 22 . The base 21 is connected to the control pipe 1 . The frequency detection mechanism 22 is installed on the base 21 , and the detection end of the frequency detection mechanism 22 extends into the base 21 .

[0056] See also Figure 4 The base 21 includes a base body 211, a cavity 212 and a detection chamber 213. The base body 211 is connected to the control pipe 1, and there is a cavity 212 inside. The detection chamber 213 is located inside the cavity 212. There is a gap between the outer wall of the detection chamber 213 and the inner wall of the cavity 212, and the gap is used for liquid flow.

[0057] When the base body 211 is connected to the control pipe 1, the control pipe 1 needs to be divided into two sections. The two sections of the control pipe 1 are respectively connected to the front end and the rear end of the base body 211. Here, it can also be described as the base body 211 dividing the cavity in the control pipe 1 into a first cavity 101 and a second cavity 102. Figure 2 shown.

[0058] At this time, the first cavity 101, the detection chamber 213, the gap between the outer wall of the detection chamber 213 and the inner wall of the cavity 212, and the second cavity 102 are connected in sequence, and the liquid to be detected flows through the first cavity 101, the detection chamber 213, the gap between the outer wall of the detection chamber 213 and the inner wall of the cavity 212, and the second cavity 102 in sequence.

[0059] At this time, the detection end of the frequency detection mechanism 22 extends into the detection chamber 213 .

[0060] In some possible implementations, an interception body 214 is provided in the detection chamber 213 . The function of the interception body 214 is to establish a stable zone at the detection end of the frequency detection mechanism 22 to prevent the flowing liquid from directly acting on the detection end of the frequency detection mechanism 22 .

[0061] At this time, it is also necessary that the projection area of ​​the intercepting body 214 is smaller than the flow area of ​​the detection chamber 213 on the plane perpendicular to the axis of the detection chamber 213. At the same time, in the flow direction of the medium in the detection chamber 213, the detection end of the frequency detection mechanism 22 is located behind the intercepting body 214.

[0062] Furthermore, a magnet group 215 is added to the inner wall of the detection chamber 213 , and the detection end of the frequency detection mechanism 22 is located within the coverage range of the magnet group 215 .

[0063] The functions of the magnet group 215 are as follows:

[0064] Stable signal output. Vortex flow measurement utilizes the rotating vortex currents generated by fluid flowing through a pipeline, and the flow rate is inferred by detecting the frequency of the vortex currents. The introduction of magnet assembly 215 allows the fluid to form more synchronized and stable vortex currents as it flows through the detection end of frequency detection mechanism 22, thereby stabilizing the flowmeter's output signal and reducing measurement errors. This stabilization helps improve measurement accuracy and reliability.

[0065] Increased sensitivity: The magnet group 215 can also increase the sensitivity of the detection end of the frequency detection mechanism 22 to the fluid flow. Through the action of the magnetic field, subtle changes in the eddy current can be more accurately sensed and converted into more obvious electrical signal outputs.

[0066] In some possible implementations, the line connecting the magnets in the magnet group 215 is perpendicular to the axis of the intercepting body 214 .

[0067] In some examples, the frequency detection mechanism 22 includes a detection housing 221, a transmission rod 222, a main control circuit 223 and a sensor 224. The detection housing 221 is connected to the base 21, and the transmission rod 222 is installed in the detection housing 221. The first end of the transmission rod 222 extends into the base 21, and there is a blind hole on the second end.

[0068] The main control circuit 223 is installed on the detection housing 221 .

[0069] The sensor 224 is also installed on the detection housing 221 and electrically connected to the main control circuit 223. The probe rod of the sensor 224 extends into the blind hole on the second end of the transmission rod 222, and the outer wall of the probe rod of the sensor 224 abuts against the inner wall of the blind hole on the second end of the transmission rod 222.

[0070] According to the detection principle described above, when the transmission rod 222 starts to vibrate, the vibration is transmitted to the sensor 224. At this time, the sensor 224 converts the vibration signal into an electrical signal. The specific methods are as follows:

[0071] Electromagnetic induction sensing: Using the principle of electromagnetic induction, when vibration causes the conductor in the sensor to move in the magnetic field, it cuts the magnetic lines of force and generates an electromotive force. This electromotive force is the electrical signal converted from the vibration.

[0072] Piezoelectric sensing: Utilizing the piezoelectric effect of piezoelectric materials, when a piezoelectric material is subjected to an external force, it generates an electric charge whose magnitude is proportional to the force. Therefore, the vibration signal can be converted into an electrical signal.

[0073] Capacitive sensing: Vibration causes a change in the distance or area between the two plates of a capacitor, which in turn causes a change in capacitance. This change in capacitance can be converted into a voltage signal.

[0074] In some possible implementations, in the direction away from the transmission rod 222, the diameter of the probe rod of the sensor 224 tends to increase first and then decrease, in order to reduce the contact area and improve the detection sensitivity.

[0075] It should be understood that in some embodiments, the intelligent control device for water injection wells combines a flow meter, a flow regulator, an intelligent controller, and a pressure transmitter into an integrated intelligent flow control device. The corresponding flow meter operates based on the integrated vortex flow measurement principle and electromagnetic flow measurement principle. The flow set value is compared with the flow value detected by the flow meter. When the system flow value and the set value exceed the allowable range, the flow regulator is activated to bring the flow value to or near the set value (within the allowable error range). This is suitable for automated control devices in industries such as oil fields and chemicals that have strict flow requirements, and is particularly suitable for applications such as high-pressure water injection, water seepage, and polymer injection in oil fields.

[0076] It should also be understood that since this application does not involve improvements to the sensor electronics itself, those skilled in the art can refer to the prior art to understand the structure and operation of the relevant sensors. It is understood that the sensor can convert the physical parameters detected by the sensor into optical or electrical signals for output. The specific type of sensor described in this application may be an electrical sensor in some embodiments and an optical sensor in other embodiments. In each embodiment, the sensor is merely illustrated for schematic purposes.

[0077] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between the various embodiments can be referred to in detail. The terminology used herein is selected to best explain the principles, practical applications, or technological improvements of each embodiment in the market, or to enable other persons of ordinary skill in the art to understand the various embodiments disclosed herein.

[0078] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure. The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An intelligent control device for high-pressure water injection wells, characterized in that: include: Control pipeline (1); A flow meter (2), an electric actuator (3) and a pressure transmitter (4) are all arranged on the control pipe (1); There are two pressure transmitters (4), and the flow meter (2) and the electric actuator (3) are located between the two pressure transmitters (4).

2. The intelligent control device for high-pressure water injection wells according to claim 1, characterized in that: The flow meter (2) comprises: A base (21) connected to the control pipe (1); A frequency detection mechanism (22) has a detection end extending into the base (21).

3. The intelligent control device for high-pressure water injection wells according to claim 2, characterized in that: The base (21) comprises: The base body (211) is connected to the control pipe (1); A cavity (212) is provided inside the base body (211); A detection chamber (213) is located inside the cavity (212), and a gap exists between the outer wall of the detection chamber (213) and the inner wall of the cavity (212); The base body (211) divides the cavity in the control pipe (1) into a first cavity (101) and a second cavity (102); The first cavity (101), the detection chamber (213), the gap between the outer wall of the detection chamber (213) and the inner wall of the cavity (212), and the second cavity (102) are sequentially connected; The detection end of the frequency detection mechanism (22) extends into the detection chamber (213).

4. The intelligent control device for high-pressure water injection wells according to claim 3, characterized in that: An interception body (214) is provided in the detection chamber (213); On a plane perpendicular to the axis of the detection chamber (213), the projected area of ​​the intercepting body (214) is smaller than the flow area of ​​the detection chamber (213); In the flow direction of the medium in the detection chamber (213), the detection end of the frequency detection mechanism (22) is located behind the interception body (214).

5. The intelligent control device for high-pressure water injection wells according to claim 4, characterized in that: A magnet group (215) is provided on the inner wall of the detection chamber (213); The detection end of the frequency detection mechanism (22) is located within the coverage range of the magnet group (215).

6. The intelligent control device for high-pressure water injection wells according to claim 5, characterized in that: The connecting line of the magnets in the magnet group (215) is perpendicular to the axis of the intercepting body (214).

7. The intelligent control device for high-pressure water injection wells according to claim 2, characterized in that: The frequency detection mechanism (22) comprises: A detection housing (221) is connected to the base (21); A transmission rod (222) is disposed in the detection housing (221), and a first end of the transmission rod (222) extends into the base (21); A main control circuit (223) is provided on the detection housing (221); A sensor (224) is provided on the detection housing (221) and is electrically connected to the main control circuit (223). The probe of the sensor (224) extends into the blind hole on the second end of the transmission rod (222); The outer wall of the sensor (224) probe is in contact with the inner wall of the blind hole on the second end of the transmission rod (222).

8. The intelligent control device for high-pressure water injection wells according to claim 7, characterized in that: In the direction away from the transmission rod (222), the diameter of the probe rod of the sensor (224) tends to increase first and then tends to decrease.

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