Intelligent measuring and controlling device of automatic seeking control multi-water nozzle switch

Abstract

The application provides an intelligent measuring and controlling device for automatically positioning and controlling a multi-water nozzle switch, comprising an upper joint, an upper layer water nozzle adjusting mechanism, a middle layer water nozzle adjusting mechanism, a lower layer water nozzle adjusting mechanism, an outer joint and an inner joint, the upper joint is connected to a wellhead with an oil pipe, the outer joint and the inner joint are connected with large and small oil pipes respectively, the upper layer water nozzle adjusting mechanism is connected with the upper joint, the lower layer water nozzle adjusting mechanism is connected with the outer joint and the inner joint, part of liquid is injected into an upper layer stratum after passing through the upper layer water nozzle adjusting mechanism, the rest of the liquid enters the middle layer water nozzle adjusting mechanism, and is injected into a middle layer stratum through an annulus of the large and small oil pipes, the remaining liquid continues to enter the lower layer water nozzle adjusting mechanism, and is injected into a lowermost layer stratum through the small pipe. The intelligent measuring and controlling device for automatically positioning and controlling a multi-water nozzle switch can control three layer water nozzle switches at the same time, realize three layer water volume testing, three layer injection parameter monitoring and collecting, and realize one control three layer intelligent separate injection.

Description

Technical Field

[0001] This invention relates to the field of intelligent measurement and control technology for oilfield downhole wells, and in particular to an intelligent measurement and control device for automatic positioning control of multi-nozzle switches. Background Technology

[0002] After years of development, water-drive reservoirs in domestic old oilfields are showing new characteristics and increasing development difficulty. Reservoir simulation experiments and field experience show that separate production and injection can achieve balanced utilization of heterogeneous reservoirs and effectively improve recovery rates, with water wells mainly using three-layer injection.

[0003] Cable-guided intelligent water injection transmits downhole production status parameters to the surface in real time via cable. After surface data processing and analysis, the surface control system issues commands to adjust the intelligent water distributor to achieve water injection at each level.

[0004] Currently, cable-based intelligent water injection achieves intelligent water injection for each floor by installing water distributors on each floor. However, these intelligent water distributors can only meet the needs of single-floor monitoring and control; achieving multi-floor monitoring and control requires the combined use of multiple water distributors. Therefore, the implementation cost of cable-based intelligent water injection is relatively high.

[0005] Chinese patent application CN201310009501.1 discloses a control device for downhole stratified flow in water injection wells. The device comprises a cylindrical controller with an actuator at its lower end, and an internal flow channel and cable. The cylindrical controller is connected to a flow meter and a control unit. The actuator is connected to an electrically adjustable nozzle. An inlet connected to the electrically adjustable nozzle is located in the flow channel. An outlet connected to the electrically adjustable nozzle is located on the cylindrical controller. The flow meter and actuator are electrically connected to the control unit. The flow meter acquires the stratified water volume in real time and transmits it to the control unit. When the stratified water volume is outside the preset range, the control unit sends a control signal to the actuator. The actuator receives the control signal and adjusts the inlet or outlet flow of the electrically adjustable nozzle. This device enables real-time monitoring of downhole parameters in the water injection well and adjustment of the injection volume via the actuator. It also features a packer verification function via a pressure gauge and remote control capability.

[0006] Chinese patent application CN202110766797.6 discloses an intelligent stratified water injection device. The upper end of the outer shell is screwed with an upper water injection connector, and the lower end is screwed with a lower water injection connector. The lower part of the central hole of the upper water injection connector is connected to an axially penetrating upper connector offset hole. The lower part of the inner cavity of the lower water injection connector has an axially penetrating lower connector offset hole. The lower port of the upper connector offset hole is connected to and penetrates the upper end of the lower connector offset hole via a screen tube. The lower water injection connector also has an axial connection hole parallel to the lower connector offset hole. A formation water injection port is located on the middle sidewall of the lower water injection connector, extending radially inward and penetrating the lower end of the axial connection hole. An intelligent water distributor is installed in the lower part of the inner cavity of the outer shell. The axis of the intelligent water distributor is parallel to the axis of the screen tube, and the lower outlet of the intelligent water distributor is penetrating the upper end of the axial connection hole of the lower connector. This device can achieve precise water injection into the local strata without affecting water injection into the underlying strata or the entry and exit of instruments from the well.

[0007] Chinese patent application CN201810966908.6 discloses an intelligent downhole stratified water injection flow rate regulation system. This system includes a PLC control unit and, from top to bottom, an upper connector, a conical flow channel conversion pipe, a power generation unit, an intelligent water distributor, and a lower connector. The conical flow channel conversion pipe has two offset holes on both sides, with an upper circular conical hole located between the two offset holes. The end of the upper circular conical hole communicates with both the power generation branch and the water injection branch. A solenoid valve is installed on the conical flow channel conversion pipe. The end of the power generation branch connects to the lower circular conical hole, which communicates with the power generation unit, which contains a downhole impeller generator. The lower end of the power generation unit and the water injection branch are both connected to the intelligent water distributor. The water distribution chamber and the water outlet chamber of the intelligent water distributor are connected via an adjustable water nozzle. A platinum resistance thermometer, a lever flow meter, and a silicon piezoresistive pressure gauge are installed in the water outlet chamber. The adjustable water nozzle is connected to a geared motor. This invention eliminates the need for repeated retrieval operations, and the water injection volume can be adjusted in real time.

[0008] Chinese patent application CN201410208075.9 discloses a casing-supported well layered water injection device. The casing has an upper connecting hole and a lower connecting hole. A support pipe is driven into the damaged section of the casing. A sealing cylinder is first installed inside the support pipe and then lowered into the casing along with the support pipe. A sub-injector is connected to the lower part of the injection pipe and then lowered into the sealing cylinder along with it. An external sealing device is located between the sub-injector and the sealing cylinder. A connecting groove is formed on the sub-injector, positioned above the external sealing device. A water distribution core is also included. The upper water nozzle is installed horizontally in the middle of the upper part, and the lower water nozzle is installed at the bottom of the water distribution core. The upper and lower water nozzles are connected to the inside of the water distribution core. An upper sealing device and a lower sealing device are installed on the water distribution core. The upper sealing device is above the upper water nozzle, and the lower sealing device is below the upper water nozzle. After the water distribution core is put into the injection body, the upper sealing device is above the connecting groove, and the lower sealing device is below the connecting groove. Through the throttling control of the water distribution core and the upper and lower water nozzles, the water is injected in layers to achieve the required water distribution.

[0009] The above-mentioned existing technologies are all quite different from the present invention and have failed to solve the technical problem we want to solve. Therefore, we have invented a new intelligent measurement and control device for automatic positioning control of multi-water nozzle switches. Summary of the Invention

[0010] The purpose of this invention is to provide an intelligent measurement and control device that can control the simultaneous injection of water into three underground layers from the ground via cable, and automatically locate and control multiple water nozzle switches.

[0011] The objective of this invention can be achieved through the following technical measures: an intelligent control device for automatically locating and controlling multiple water nozzle switches, comprising an upper connector, an upper water nozzle adjustment mechanism, a middle water nozzle adjustment mechanism, a lower water nozzle adjustment mechanism, an outer connector, and an inner connector. The upper connector is connected to the wellhead via tubing, and the outer and inner connectors are respectively connected to the large and small tubing. The upper water nozzle adjustment mechanism is connected to the upper connector, and the lower water nozzle adjustment mechanism is connected to the outer and inner connectors. After the incoming fluid passes through the upper water nozzle adjustment mechanism, a portion of the fluid is injected into the upper formation, and the remaining fluid enters the middle water nozzle adjustment mechanism and is injected into the intermediate formation through the annulus of the large and small tubing. The remaining fluid continues to enter the lower water nozzle adjustment mechanism and is injected into the lowest formation through the small tube.

[0012] The objective of this invention can also be achieved through the following technical measures:

[0013] The upper water tap adjustment mechanism includes an upper connector, an upper sleeve, an upper fixed water outlet valve, an upper adjusting core, and an upper clamping spring. The upper connector is connected to the upper connector, and the upper connector is connected to the upper sleeve. The upper part of the upper fixed water outlet valve is inserted into the upper connector, and the lower part is connected to the upper sleeve. The upper adjusting core is installed at the bottom of the upper fixed water outlet valve and is clamped and fixed by the upper clamping spring.

[0014] The upper water tap adjustment mechanism also includes an upper regulating valve plate and an upper throttling orifice. The upper regulating valve plate is installed on the upper fixed water outlet valve. The upper throttling orifice coincides with the water outlet of the upper fixed water outlet valve. The rotation of the upper regulating core can realize the opening and closing of the upper throttling orifice on the upper regulating valve plate. The change in the opening position causes the throttling area of ​​the upper throttling orifice to change.

[0015] The upper water tap adjustment mechanism also includes a first internal pressure sensor and a first external pressure sensor. The first internal pressure sensor collects the pressure value before the valve of the upper fixed water outlet valve, and the first external pressure sensor collects the pressure value after the valve of the upper fixed water outlet valve, thereby obtaining the pressure difference ΔP.

[0016] The throttling area A0 corresponding to different opening positions of the upper throttling orifice is constant. Based on the pressure difference ΔP, the flow rate q at a certain opening position can be obtained using the differential pressure flow rate calculation formula. v :

[0017]

[0018] The outflow coefficient C can be expressed as:

[0019] C = 0.5961 + 0.0261β 2 -0.216β 8 (2)

[0020] β=d / D (3)

[0021] Where: C—outflow coefficient;

[0022] β—diameter ratio;

[0023] d—Equivalent diameter of the throttling orifice;

[0024] D—Pipe diameter;

[0025] ΔP — Pressure difference;

[0026] A0—Open throttling area;

[0027] ρ — fluid density.

[0028] The middle water tap adjustment mechanism includes a middle protective sleeve, a middle fixed water outlet valve, a middle adjusting core, a middle connecting piece, and a middle clamping spring. The upper end of the middle protective sleeve is connected to the upper fixed water outlet valve, and the lower end is connected to the middle fixed water outlet valve. The middle adjusting core is installed on the upper part of the middle fixed water outlet valve and is clamped and fixed by the middle clamping spring. One end of the middle connecting piece is connected to the middle fixed water outlet valve.

[0029] The intermediate water tap adjustment mechanism also includes an intermediate regulating valve plate and an intermediate throttling orifice. The intermediate regulating valve plate is installed on the intermediate fixed water outlet valve. The intermediate throttling orifice coincides with the water outlet of the intermediate fixed water outlet valve. The rotation of the intermediate regulating core can realize the opening and closing of the intermediate throttling orifice on the intermediate regulating valve plate. The change in the opening position causes the throttling area of ​​the intermediate throttling orifice to change.

[0030] The middle-layer water tap adjustment mechanism also includes a second internal pressure sensor and a second external pressure sensor. The second internal pressure sensor collects the pressure value before the valve of the middle fixed water outlet valve, and the second external pressure sensor collects the pressure value after the valve of the middle fixed water outlet valve, thereby obtaining the pressure difference ΔP.

[0031] The lower water tap adjustment mechanism includes a lower casing, a lower fixed outlet valve, a lower adjusting core, a lower connector, an adapter, and a lower clamping spring. The lower end of the middle casing is connected to the lower casing. The other end of the middle connector is connected to the lower fixed outlet valve. The lower adjusting core is installed on the upper part of the lower fixed outlet valve and is clamped and fixed by the lower clamping spring. The lower end of the lower fixed outlet valve is connected to the lower connector. The lower connector is connected to the adapter. The lower end of the adapter is connected to the inner connector. The lower end of the lower casing is connected to the outer connector.

[0032] The lower water tap adjustment mechanism also includes a lower regulating valve plate and a lower throttling orifice. The lower regulating valve plate is installed on the lower fixed water outlet valve. The lower throttling orifice coincides with the water outlet of the lower fixed water outlet valve. The rotation of the lower regulating core can realize the opening and closing of the lower throttling orifice on the lower regulating valve plate. The change in the opening position causes the throttling area of ​​the lower throttling orifice to change.

[0033] The lower water tap adjustment mechanism also includes a third internal pressure sensor and a third external pressure sensor. The third internal pressure sensor collects the pressure value before the valve of the lower fixed water outlet valve, and the third external pressure sensor collects the pressure value after the valve of the lower fixed water outlet valve, thereby obtaining the pressure difference ΔP.

[0034] The automatic positioning control faucet switch electronic drive module includes a drive motor power assembly, a positioning motor power assembly for displacement via rotation, a polygonal adjustment drive shaft, a moving link, a positioning drive shaft, an adjusting claw, a motor sealing section, and a control circuit. The drive motor power assembly is installed inside and sealed within the upper fixed outlet valve, and its lower end is connected to the polygonal adjustment drive shaft. The polygonal adjustment drive shaft engages with the moving link. Adjusting the rotation of the polygonal adjustment drive shaft drives the moving link to rotate synchronously. The adjusting claw is mounted on the moving link and has an internal spring mechanism for radial extension and retraction. During adjustment of the upper faucet adjustment mechanism... The adjusting claw is embedded in the slot of the upper adjusting core. The rotation of the adjusting claw drives the upper adjusting core to rotate, thereby changing the opening position of the upper adjusting valve plate. The positioning motor power assembly and the control circuit are installed and sealed in the motor sealing section. The lower fixed outlet valve is connected to the motor sealing section at its lower end. The motor sealing section is connected to the adapter. The upper end of the positioning drive shaft is connected to the positioning motor power assembly, and the lower end is connected to the moving link. The rotation of the positioning motor power assembly and the positioning drive shaft drives the moving link to move up and down. The control circuit controls the movement to different levels of the adjusting core, realizing the automatic positioning function.

[0035] The intelligent control device for the automatic positioning control multi-faucet switch also includes an automatic positioning control faucet switch electrical control drive module. This module controls the operation of the positioning motor power assembly to rotate the high-positioning drive shaft, thereby causing the adjusting claw to move axially and coincide with the corresponding adjusting core of each layer. It can also control the operation of the positioning motor power assembly to rotate the adjusting drive shaft, which in turn drives the adjusting claw to rotate, thereby causing the corresponding adjusting core to rotate and control the water output, thus achieving the function of water volume regulation for each layer.

[0036] The drive motor powertrain is the power output end, which includes the motor and the reduction gear mechanism.

[0037] The intelligent monitoring and control device for the automatic position-finding control of the multi-nozzle switch also includes a cable and ground equipment. The cable is bundled to the outer wall of the oil pipe. The ground equipment sends a specific flow adjustment command for a certain layer to the control circuit through the cable. The control circuit compares the flow value of the adjusted layer with the preset flow value to determine whether the valve opening position should be large or small, thereby controlling the drive motor power assembly to adjust to different opening positions. Each adjustment collects the values ​​of the internal and external pressure sensors, calculates the flow value at the current opening position using the differential pressure flow calculation formula, and compares it with the preset flow value. If the condition is met, the adjustment is completed; otherwise, the adjustment continues until the condition is met. After the adjustment is completed, the control circuit sends the adjustment completion information back to the ground equipment through the cable.

[0038] The intelligent control device for automatically locating and controlling multiple water nozzle switches in this invention can simultaneously control water injection into three layers of the well via cable from the ground. It can simultaneously control the water nozzle switches of all three layers, enabling the testing of water volume at each layer and the monitoring and acquisition of injection parameters, thus achieving intelligent, one-to-three-layer water injection. Compared with existing technologies, this intelligent control device for automatically locating and controlling multiple water nozzle switches has the following advantages:

[0039] 1. The device has built-in pressure and temperature sensors that can monitor and collect formation data in real time.

[0040] 2. This device meets the water injection requirements of injection wells and can support up to three layers of injection.

[0041] 3. This device can achieve automatic measurement and adjustment of each layer without the need for additional instruments.

[0042] 4. This device can achieve stratified flow metering to meet the needs of stratified water distribution.

[0043] 5. This device can replace three conventional smart water dispensers with the same function at the same time, and has a very high cost performance.

[0044] 6. This device can be lowered to any position in the well shaft, effectively avoiding the impact of high temperature on electronic components.

[0045] 7. The application of this device reduces the complexity of tools in oil-bearing sections and allows for a wider range of tool selection. Attached Figure Description

[0046] Figure 1 This is a structural diagram of a specific embodiment of the intelligent measurement and control device for automatic positioning control of multi-faucet switches of the present invention;

[0047] Figure 2 This is a design diagram of a concentric double-pipe flow channel structure in a specific embodiment of the present invention;

[0048] Figure 3 This is a design drawing of a multi-position valve plate type rotary water outlet mechanism in a specific embodiment of the present invention.

[0049] Explanation of reference numerals in the attached diagram: 1-Upper connector; 2-Upper connecting piece; 3-Upper protective sleeve; 4-Fixed outlet valve (upper); 5-Adjusting core (upper); 6-Adjusting claw; 7-Pressure spring; 8-Middle protective sleeve; 9-Adjusting core (middle); 10-Fixed outlet valve (middle); 11-Lower protective sleeve; 12-Middle connecting piece; 13-Adjusting core (lower); 14-Fixed outlet valve (lower); 15-Lower connecting piece; 16-Motor sealing section; 17-Adapter; 1 8-External connector; 19-Internal connector; 20-Drive motor power assembly; 21-Adjusting drive shaft; 22-Moving linkage; 23-Positioning drive shaft; 24-Positioning motor power assembly; 25-Communication control circuit assembly; 26-Internal pressure (before valve) sensor; 27-External pressure (after valve) sensor; 28-Liquid inlet; 29-Upper layer liquid outlet; 30-Middle layer liquid outlet; 31-Lower layer liquid outlet; 32-Adjusting valve plate; 33-Throttle orifice. Detailed Implementation

[0050] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0051] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, and / or combinations thereof.

[0052] The present invention provides an intelligent measurement and control device for automatically positioning and controlling multiple water tap switches. It includes an electronically controlled drive system for automatically positioning and controlling water tap switches, comprising a drive motor for controlling the water tap switches, a positioning motor for rotating to achieve displacement, a moving linkage, an adjusting claw for switching the water taps, and a control circuit.

[0053] The intelligent measurement and control device for automatic positioning control of multi-nozzle switches invented a bridge-type water injection channel and an inner and outer double-pipe lower connector, forming a concentric double-pipe flow channel structure, realizing the purpose of the device to inject water in three layers.

[0054] This intelligent measurement and control device for automatic position control of multi-faucet switches invented a multi-position valve plate type rotary faucet mechanism. The faucet opening is divided into open, closed and multiple open positions. Each open position has a fixed throttling area. In conjunction with the pressure values ​​monitored by the pressure sensors before and after the valve, the flow rate can be measured.

[0055] The following are several specific embodiments of the application of the present invention.

[0056] Example 1

[0057] In a specific embodiment 1 of the present invention, an intelligent measurement and control device for automatically positioning and controlling multi-faucet switches is provided, such as... Figure 1 As shown, the device incorporates a drive system for controlling the three-stage water nozzle switch, pressure and temperature sensors, etc. The device connects to the wellhead via the upper connector 1 and the tubing. A cable is bundled to the outer wall of the tubing, and surface equipment communicates with the device via the cable for surface control. The lower part of the device connects to the large and small tubing via the outer connector 18 and the inner connector 19, respectively. It is also equipped with packers, well-washing valves, and other tools to achieve stratified injection. The uppermost layer is injected directly into the formation through the device, the middle layer is injected through the annulus of the large and small tubing, and the lowermost layer is injected through the small tubing.

[0058] The connection relationship of the device is as follows: the upper connector 1 is connected to the upper connecting piece 2, the upper connecting piece 2 is connected to the upper protective sleeve 3, the upper part of the fixed outlet valve (upper) 4 is inserted into the upper connecting piece 2, and the lower part is connected to the upper protective sleeve 3, the adjusting core (upper) 5 is installed at the bottom of the fixed outlet valve (upper) 4 and is pressed and fixed by the compression spring 7, the upper end of the middle protective sleeve 8 is connected to the fixed outlet valve (upper) 4, the lower end is connected to the fixed outlet valve (middle) 10 inside, and the lower end is connected to the lower protective sleeve 11 outside, and the adjusting core (middle) 9 is installed on the upper part of the fixed outlet valve (middle) 10, and... The middle connector 12 is fixed by compression spring 7. One end of the middle connector 12 is connected to the fixed outlet valve (middle) 10, and the other end is connected to the fixed outlet valve (lower) 14. The adjusting core (lower) 13 is installed on the upper part of the fixed outlet valve (lower) 14 and is fixed by compression spring 7. The lower end of the fixed outlet valve (lower) 14 is connected to the motor sealing section 16 inside and the lower end is connected to the lower connector 15 outside. The lower connector 15, the motor sealing section 16 are connected to the adapter 17, and the lower end is connected to the inner connector 19. The lower end of the lower sleeve 11 is connected to the outer connector 18.

[0059] Example 2

[0060] In a specific embodiment 2 of the present invention, an automatic positioning control water tap switch electronically controlled drive system, such as Figure 1As shown, the system includes components such as a drive motor for controlling the faucet switch, a positioning motor for displacement via rotation, a drive shaft, a moving linkage, an adjusting claw for switching the faucet, and a control circuit. The drive motor power assembly 20 is installed inside and sealed within the fixed outlet valve (upper) 4. The drive motor power assembly 20 is the power output end, containing components such as a motor and a reduction mechanism. Its lower end is connected to the polygonal adjusting drive shaft 21, which engages with the moving linkage 22. The rotation of the adjusting drive shaft 21 drives the moving linkage 22 to rotate synchronously. The adjusting claw 6 is installed on the moving linkage 22 and has an internal spring mechanism that allows for radial extension and retraction. During adjustment, the adjusting claw 6 is inserted into the slot of the adjusting core (upper) 5. The rotation of the adjusting claw 6 drives the adjusting core (upper) 5 to rotate, thereby changing the opening position of the regulating valve plate 32. The positioning motor power assembly 24 and the communication control circuit assembly 25 are installed and sealed inside the motor sealing section 16. The rotation of the positioning motor power assembly 24 and the positioning drive shaft 23 drives the moving connecting rod 22 to move up and down. It can be moved to different water nozzle adjustment cores under the control of the communication control circuit assembly 25 to realize the automatic positioning function.

[0061] The specific control process is as follows: the ground equipment sends an adjustment command to the communication control circuit assembly 25 via cable. The communication control circuit assembly 25 controls the positioning motor power assembly 24 to work according to the sent command, so that the adjustment claw moves to the corresponding adjustment core of the adjustment layer. The drive motor power assembly 20 is then controlled to work to complete the adjustment. After the adjustment is completed, the communication control circuit assembly 25 sends the adjustment completion information back to the ground equipment via cable.

[0062] Example 3

[0063] In a specific embodiment 3 of the present invention, a concentric dual-channel flow structure, such as Figure 1 , 2 As shown, the incoming fluid enters the upper water nozzle regulating mechanism through inlet 28, and after being regulated by regulating core (upper) 5, flows out from upper outlet 29 and is injected into the upper formation. The remaining fluid enters the middle water nozzle regulating mechanism, and after being regulated by regulating core (middle) 9, flows out from middle outlet 30 and is injected into the intermediate formation through the flow channel. The remaining fluid continues to enter the lower water nozzle regulating mechanism, and after being regulated by regulating core (lower) 13, flows out from lower outlet 31 and is injected into the next formation through the flow channel. The lower connector of this device adopts a concentric double connector design, which achieves simultaneous injection of the upper, middle and lower layers of well fluid through ingenious structural design.

[0064] Example 4

[0065] In a specific embodiment 4 of the present invention, a multi-position valve plate type rotary water nozzle mechanism, such as Figure 1 , 3As shown, the system comprises a fixed outlet valve, an adjusting core, an adjusting valve plate 32, a throttling orifice 33, an internal pressure (before the valve) sensor 26, and an external pressure (after the valve) sensor 27. Taking the upper-level water tap adjusting mechanism as an example, the adjusting valve plate 32 is installed on the fixed outlet valve (upper) 4, and the throttling orifice 33 coincides with the outlet orifice on the fixed outlet valve. Rotating the adjusting core (upper) 5 can open and close the throttling orifice 33 on the adjusting valve plate 32. The change in the opening position causes the throttling area of ​​the throttling orifice 33 to change. The throttling area A0 corresponding to different opening positions is constant. The pressure values ​​before and after the valve are measured by the pressure sensor, i.e., the pressure difference ΔP, and the differential pressure flow rate is calculated using the differential pressure flow rate formula. The flow rate value under a certain open position can be obtained.

[0066]

[0067] The outflow coefficient C can be expressed as:

[0068] C = 0.5961 + 0.0261β 2 -0.216β 8 (2)

[0069] β=d / D (3)

[0070] Where: C—outflow coefficient;

[0071] β—diameter ratio;

[0072] d—Equivalent diameter of the throttling orifice;

[0073] D—Pipe diameter;

[0074] ΔP — Pressure difference;

[0075] A0—Open throttling area;

[0076] ρ — fluid density.

[0077] The specific flow regulation process is as follows: the ground equipment sends a specific flow regulation command for a certain layer to the communication control circuit assembly 25 via cable. The communication control circuit assembly 25 compares the flow value of the regulated layer with the preset flow value to determine whether the valve opening position should be large or small, thereby controlling the motor to adjust to different opening positions. Each adjustment collects the values ​​of the internal and external pressure sensors and automatically calculates the flow value at the current opening position using the differential pressure flow calculation formula. It compares the result with the preset flow value. If the condition is met, the adjustment is complete. If the condition is not met, the adjustment continues until it is met. After the adjustment is completed, the communication control circuit assembly 25 sends the adjustment completion information back to the ground equipment via cable.

[0078] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the 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.

[0079] Except for the technical features described in the specification, all other technologies are known to those skilled in the art.

Claims

1. An intelligent measurement and control device for automatic positioning control of multi-faucet switches, characterized in that, The intelligent measurement and control device for automatic positioning control of multi-nozzle switches includes an upper connector, an upper nozzle adjustment mechanism, a middle nozzle adjustment mechanism, a lower nozzle adjustment mechanism, an outer connector, and an inner connector. The upper connector is connected to the wellhead via the tubing. The outer connector and the inner connector are respectively connected to the large and small tubing. The upper nozzle adjustment mechanism is connected to the upper connector. The lower nozzle adjustment mechanism is connected to the outer connector and the inner connector. After the incoming fluid passes through the upper nozzle adjustment mechanism, part of the fluid is injected into the upper formation. The remaining fluid enters the middle nozzle adjustment mechanism and is injected into the middle formation through the annulus of the large and small tubing. The remaining fluid continues to enter the lower nozzle adjustment mechanism and is injected into the lowest formation through the small tube. The intelligent measurement and control device for the automatic positioning control multi-faucet switch also includes an automatic positioning control faucet switch electric control drive module. This automatic positioning control faucet switch electric control drive module controls the operation of the positioning motor power assembly to make the high positioning drive shaft rotate, thereby driving the adjusting claw to move axially and coincide with the adjusting core of the faucet adjusting mechanism of each layer. It can control the operation of the positioning motor power assembly to make the adjustment drive shaft rotate, drive the adjustment claw to rotate, thereby making the corresponding adjustment core rotate to control the amount of water output, thus playing the role of adjusting the water volume of each layer.

2. The intelligent measurement and control device for automatic positioning control of multi-faucet switches according to claim 1, characterized in that, The upper water tap adjustment mechanism includes an upper connector, an upper sleeve, an upper fixed water outlet valve, an upper adjusting core, and an upper clamping spring. The upper connector is connected to the upper connector, and the upper connector is connected to the upper sleeve. The upper part of the upper fixed water outlet valve is inserted into the upper connector, and the lower part is connected to the upper sleeve. The upper adjusting core is installed at the bottom of the upper fixed water outlet valve and is clamped and fixed by the upper clamping spring.

3. The intelligent measurement and control device for automatic positioning control of multi-faucet switches according to claim 2, characterized in that, The upper water tap adjustment mechanism also includes an upper regulating valve plate and an upper throttling orifice. The upper regulating valve plate is installed on the upper fixed water outlet valve. The upper throttling orifice coincides with the water outlet of the upper fixed water outlet valve. The rotation of the upper regulating core can realize the opening and closing of the upper throttling orifice on the upper regulating valve plate. The change in the opening position causes the throttling area of ​​the upper throttling orifice to change.

4. The intelligent measurement and control device for automatic positioning control of multi-faucet switches according to claim 3, characterized in that, The upper water tap adjustment mechanism also includes a first internal pressure sensor and a first external pressure sensor. The first internal pressure sensor collects the pressure value before the upper fixed water outlet valve, and the first external pressure sensor collects the pressure value after the upper fixed water outlet valve, thereby obtaining the pressure difference. .

5. The intelligent measurement and control device for automatic positioning control of multi-faucet switches according to claim 4, characterized in that, The throttling area A0 corresponding to different opening positions of the upper throttling orifice is constant, depending on the pressure difference. The flow rate q at a certain open position can be obtained using the differential pressure flow rate calculation formula. v : （1） The outflow coefficient C can be expressed as: （2） （3） Where: C—outflow coefficient; β—diameter ratio; d—Equivalent diameter of the throttling orifice; D—Pipe diameter; —Pressure difference; A0—Open throttling area; —Fluid density.

6. The intelligent measurement and control device for automatic positioning control of multi-faucet switches according to claim 4, characterized in that, The middle water tap adjustment mechanism includes a middle protective sleeve, a middle fixed water outlet valve, a middle adjusting core, a middle connecting piece, and a middle clamping spring. The upper end of the middle protective sleeve is connected to the upper fixed water outlet valve, and the lower end is connected to the middle fixed water outlet valve. The middle adjusting core is installed on the upper part of the middle fixed water outlet valve and is clamped and fixed by the middle clamping spring. One end of the middle connecting piece is connected to the middle fixed water outlet valve.

7. The intelligent measurement and control device for automatic positioning control of multi-faucet switches according to claim 6, characterized in that, The intermediate water tap adjustment mechanism also includes an intermediate regulating valve plate and an intermediate throttling orifice. The intermediate regulating valve plate is installed on the intermediate fixed water outlet valve. The intermediate throttling orifice coincides with the water outlet of the intermediate fixed water outlet valve. The rotation of the intermediate regulating core can realize the opening and closing of the intermediate throttling orifice on the intermediate regulating valve plate. The change in the opening position causes the throttling area of ​​the intermediate throttling orifice to change.

8. The intelligent measurement and control device for automatic positioning control of multi-faucet switches according to claim 7, characterized in that, The intermediate water tap adjustment mechanism also includes a second internal pressure sensor and a second external pressure sensor. The second internal pressure sensor collects the pressure value before the fixed outlet valve, and the second external pressure sensor collects the pressure value after the fixed outlet valve, thereby obtaining the pressure difference. .

9. The intelligent measurement and control device for automatic positioning control of multi-faucet switches according to claim 8, characterized in that, The lower water tap adjustment mechanism includes a lower casing, a lower fixed outlet valve, a lower adjusting core, a lower connector, an adapter, and a lower clamping spring. The lower end of the middle casing is connected to the lower casing. The other end of the middle connector is connected to the lower fixed outlet valve. The lower adjusting core is installed on the upper part of the lower fixed outlet valve and is clamped and fixed by the lower clamping spring. The lower end of the lower fixed outlet valve is connected to the lower connector. The lower connector is connected to the adapter. The lower end of the adapter is connected to the inner connector. The lower end of the lower casing is connected to the outer connector.

10. The intelligent measurement and control device for automatic positioning control of multi-faucet switches according to claim 9, characterized in that, The lower water tap adjustment mechanism also includes a lower regulating valve plate and a lower throttling orifice. The lower regulating valve plate is installed on the lower fixed water outlet valve. The lower throttling orifice coincides with the water outlet of the lower fixed water outlet valve. The rotation of the lower regulating core can realize the opening and closing of the lower throttling orifice on the lower regulating valve plate. The change in the opening position causes the throttling area of ​​the lower throttling orifice to change.

11. The intelligent measurement and control device for automatic positioning control of multi-faucet switches according to claim 10, characterized in that, The lower water tap regulating mechanism also includes a third internal pressure sensor and a third external pressure sensor. The third internal pressure sensor collects the pressure value before the lower fixed water outlet valve, and the third external pressure sensor collects the pressure value after the lower fixed water outlet valve, thereby obtaining the pressure difference. .

12. The intelligent measurement and control device for automatic positioning control of multi-faucet switches according to claim 11, characterized in that, The automatic positioning control faucet switch electronic drive module includes a drive motor power assembly, a positioning motor power assembly for displacement via rotation, a polygonal adjustment drive shaft, a moving link, a positioning drive shaft, an adjusting claw, a motor sealing section, and a control circuit. The drive motor power assembly is installed inside and sealed within the upper fixed outlet valve, and its lower end is connected to the polygonal adjustment drive shaft. The polygonal adjustment drive shaft engages with the moving link. Adjusting the rotation of the polygonal adjustment drive shaft drives the moving link to rotate synchronously. The adjusting claw is mounted on the moving link and has an internal spring mechanism that allows for radial extension and retraction. During adjustment of the upper faucet adjustment mechanism... The adjusting claw is embedded in the slot of the upper adjusting core. The rotation of the adjusting claw drives the upper adjusting core to rotate, thereby changing the opening position of the upper adjusting valve plate. The positioning motor power assembly and the control circuit are installed and sealed in the motor sealing section. The lower fixed outlet valve is connected to the motor sealing section at its lower end. The motor sealing section is connected to the adapter. The upper end of the positioning drive shaft is connected to the positioning motor power assembly, and the lower end is connected to the moving link. The rotation of the positioning motor power assembly and the positioning drive shaft drives the moving link to move up and down. The control circuit controls the movement to different levels of the adjusting core, realizing the automatic positioning function.

13. The intelligent measurement and control device for automatic positioning control of multi-faucet switches according to claim 12, characterized in that, The drive motor powertrain is the power output end, which includes the motor and the reduction gear mechanism.

14. The intelligent measurement and control device for automatic positioning control of multi-faucet switches according to claim 12, characterized in that, The intelligent monitoring and control device for the automatic position-finding control of the multi-nozzle switch also includes a cable and ground equipment. The cable is bundled to the outer wall of the oil pipe. The ground equipment sends a specific flow adjustment command for a certain layer to the control circuit through the cable. The control circuit compares the flow value of the adjusted layer with the preset flow value to determine whether the valve opening position should be large or small, thereby controlling the drive motor power assembly to adjust to different opening positions. Each adjustment collects the values ​​of the internal and external pressure sensors, calculates the flow value at the current opening position using the differential pressure flow calculation formula, and compares it with the preset flow value. If the condition is met, the adjustment is completed; otherwise, the adjustment continues until the condition is met. After the adjustment is completed, the control circuit sends the adjustment completion information back to the ground equipment through the cable.

Images