Double-pulse high-speed wave code intelligent water distributor

Abstract

The present application relates to a kind of double-pulse high-speed wave code intelligent water distributor, including outer casing, the upper joint and lower joint are connected respectively in the both ends of the outer casing, adjusting water tap is arranged on the upper joint, and return code water tap is switched by switch valve quickly to produce flow code feedback to ground control instrument and realize communication.The double-pulse high-speed wave code intelligent water distributor of the present application can be specially used for return code communication by the return code water tap set, can quickly identify ground instruction, quickly respond return code program, reach the purpose of quick return code communication, while adjusting water tap and return code water tap are operated respectively, division of labor is clear, and work efficiency is high.

Description

Technical Field

[0001] This invention belongs to the field of stratified gas injection and oil recovery technology for oil and gas wells, and specifically relates to a dual-pulse high-speed wavecode intelligent water distributor. Background Technology

[0002] As oilfields enter the middle and late stages, water injection is necessary. Water injection equipment is used to inject water of the required quality from injection wells into the oil layer to maintain the oil layer pressure. Water injection is one of the important means to replenish the formation with energy and improve the oil recovery rate during the oilfield development process. With the promotion and application of intelligent injection technology, oilfields have put forward higher requirements for intelligent injection tools.

[0003] Dual-pulse communication intelligent stratified water injection technology is a new type of stratified water injection technology that integrates wireless communication technology, intelligent stratified water injection technology, and artificial intelligence technology. It is also the fourth-generation water injection technology for oilfields. The dual-pulse communication intelligent sub-injection system is a communication technology that intelligently intervenes (increases or decreases) the pressure and flow in the wellbore according to a set law. By increasing or decreasing the flow of liquid in the environment, a coded sequence wave is formed, and information is transmitted in different sequence waves. The dual-pulse communication intelligent sub-injection system uses pressure wave and flow wave carriers for bidirectional communication. However, the current dual-pulse communication intelligent stratified water injection technology has problems such as excessively long communication time and poor real-time performance. The current conventional water distributor nozzle structure is a piston structure, which takes about 3-5 minutes from opening to closing. The average communication time from the surface to the well is 50 minutes. This results in an average downhole code return time of 2 hours. Due to the limitation of battery power, the flow and pressure data from the well to the surface are updated on average every 15 days, resulting in poor data real-time performance and making it difficult to meet the oilfield's requirements for real-time data updates. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a dual-pulse high-speed wavecode intelligent water distributor. By employing a dual-nozzle structure, it simultaneously achieves water injection volume regulation and high-speed downhole code communication, thereby solving the problems of long time for ground-based acquisition of downhole data and poor data real-time performance in existing technologies.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A dual-pulse high-speed wavecode intelligent water distributor is characterized by: including an outer casing, with an upper connector and a lower connector connected to both ends of the outer casing respectively; the lower connector is provided with an adjusting water nozzle and a return code water nozzle; the return code water nozzle generates a flow code through a switching valve and feeds it back to the ground controller to achieve communication.

[0007] Furthermore, the communication protocol between the return code water nozzle and the ground control instrument is hexadecimal encoding, which consists of a start code, a data code, and an end code.

[0008] Furthermore, when the return code nozzle communicates with the ground control instrument, the downhole return code signal starts with a 2-second fixed-time low level as the start code, followed by a data code encoded in hexadecimal, with a data range of 0 to 100, represented by a 2-bit hexadecimal data. After the data code ends, a 2-second low level serves as the end code, ending the signal transmission. The flow rate code type is switched by switching the on / off valve of the return code nozzle, and its information code element sequence is fixed at 10 bits, with the minimum code element for the flow rate return code being 20 seconds.

[0009] Furthermore, the return code water nozzle includes a return code valve core and a return code outer tube. The return code valve core is nested inside the return code outer tube to form a switching valve. The return code valve core rotates within the return code outer tube to switch the valve on and off.

[0010] Furthermore, when the switch valve of the return code water nozzle is closed, the flow rate in the main flow channel is 0, the flow code is low level, and the pressure code is high level; when the switch valve of the return code water nozzle is open, there is flow in the main flow channel, the flow code is high level, and the pressure code is low level.

[0011] Furthermore, the return code water nozzle also includes a return code motor. The output end of the return code motor drives and connects to the return code valve core. The return code valve core has a valve hole arranged radially. The return code outer tube is provided with a channel that cooperates with the return code valve core. The return code motor drives the return code valve core to rotate forward and backward in the return code outer tube, causing the valve hole to connect with or close the channel.

[0012] Furthermore, an analog Hall sensor is installed on the output terminal of the return code motor.

[0013] Furthermore, the regulating nozzle includes a regulating valve sleeve, a regulating valve core, a regulating outer pipe, and a regulating motor. The regulating valve core is embedded in the regulating valve sleeve, and the regulating valve sleeve has an outlet on its outer periphery. The regulating motor drives the regulating valve core to move axially within the regulating valve sleeve to control the opening area of ​​the outlet.

[0014] Furthermore, a digital Hall sensor is provided at the tail end of the regulating motor.

[0015] Furthermore, a main control component is provided inside the outer casing. The main control component includes a dual-motor drive overcurrent detection circuit module, which adjusts and controls the opening and closing of the regulating water nozzle and the return code water nozzle respectively.

[0016] Because the present invention adopts the above technical solution, it has the following advantages and effects:

[0017] (1) The dual-pulse high-speed wavecode intelligent water distributor of the present invention adopts a dual-nozzle structure. One regulating nozzle controls and regulates the water injection flow rate, and the other returning nozzle has a fast-switching nozzle responsible for returning code communication. The average communication time from the ground to the well is 3 minutes. When the returning nozzle returns the flow code, the average return code time from the well is 4 minutes, thereby achieving the requirement of fast communication. This allows the flow rate and pressure data to be updated on average every day from the well to the ground, meeting the oilfield's requirement for real-time data updates.

[0018] (2) The dual-pulse high-speed wavecode intelligent water distributor of the present invention can be used for return code communication through the set return code water nozzle. It can quickly identify ground commands and quickly respond to the return code program to achieve the purpose of fast return code communication. At the same time, the regulating water nozzle and the return code water nozzle operate separately, with clear division of labor and high work efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the dual-pulse high-speed wavecode intelligent water distributor of the present invention.

[0020] Figure 2 This is an enlarged structural diagram of the adjusting water tap and the return code water tap of the present invention.

[0021] Figure 3 This is a schematic diagram of the enlarged structure for adjusting the opening of the water outlet of the water tap in this invention.

[0022] Figure 4 This is a schematic diagram of the main control component of the present invention.

[0023] Figure 5 This is a circuit diagram of the dual-motor control system of the present invention.

[0024] Figure 6(a) is a circuit diagram of the digital Hall measurement circuit module of the present invention.

[0025] Figure 6(b) is a circuit diagram of the analog Hall measurement circuit module of the present invention.

[0026] Figure 7 This is the return code pattern of the dual-pulse high-speed wavecode intelligent water distributor of the present invention.

[0027] The labels in the attached diagram are as follows: 1-1 Lower connector; 1-2 Internal pressure assembly; 1-3 Adjusting water nozzle; 1-4 Return code water nozzle; 1-5 Pressure assembly; 1-6 External pressure assembly; 1-7 Battery assembly; 1-8 Main control board assembly; 1-9 Center flow pipe; 1-10 Outer casing; 1-11 Threaded ring; 1-12 Upper connector;

[0028] 1-3-1 Adjusting valve sleeve; 1-3-2 Adjusting valve core; 1-3-3 Adjusting outer pipe; 1-3-4 Adjusting drive shaft; 1-3-5 Adjusting coupling; 1-3-6 Adjusting motor; 1-3-7 Digital Hall sensor; 131-1 Water outlet.

[0029] 1-4-1 Return code valve core; 1-4-2 Return code outer tube; 1-4-3 Return code drive shaft; 1-4-4 Analog Hall sensor; 1-4-5 Return code coupling; 1-4-6 Return code motor. Detailed Implementation

[0030] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the purpose, features, and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative of the essential spirit of the technical solution of the present invention.

[0031] The present invention provides a dual-pulse high-speed wavecode intelligent water distribution device. The overall functional design is to provide precise water distribution based on ground commands, accurately provide the water injection volume of the current layer, and store relevant downhole data, under the condition of being powered by a self-contained battery pack.

[0032] like Figure 1 As shown. The present invention provides a dual-pulse high-speed wavecode intelligent water injection and distribution device, comprising a lower connector 1-1, an internal pressure assembly 1-2, an adjusting nozzle 1-3, a return code nozzle 1-4, a pressure assembly 1-5, an external pressure assembly 1-6, a battery assembly 1-7, a main control board assembly 1-8, a central flow pipe 1-9, an outer casing 1-10, a screw ring 1-11, and an upper connector 1-12. The internal pressure assembly 1-2 measures the injection pressure, and communication between the downhole instrument and the surface is achieved through the internal pressure. The external pressure assembly 1-6 measures the formation pressure, and the pressure from the return code forms the external pressure. The pressure assembly 1-5 represents the pressure behind the orifice plate (post-orifice pressure), and the flow rate of the return code is calculated based on the pressure difference between the post-orifice pressure and the internal pressure. The battery assembly 1-7 consists of a circuit board battery and a motor battery. The circuit board battery provides power to the main control board assembly, and the motor battery provides power to the adjusting nozzle 1-3 and the return code nozzle 1-4.

[0033] The lower connector 1-1 is threaded to one end of the outer casing 1-10, and the threaded ring 1-11 is fastened to one end of the upper connector 1-12. The other end of the outer casing 1-10 is threaded to the threaded ring 1-11. One end of the central flow tube 1-9 is inserted into the flow hole of the lower connector 1-1, and the flow hole of the upper connector 1-12 is inserted into the other end of the central flow tube 1-9. The flow holes of the lower connector 1-1, the upper connector 1-12, and the central flow tube are connected.

[0034] One end of the inner pressure assembly 1-2, the regulating water nozzle 1-3, the return water nozzle 1-4, the pressure assembly 1-5, and the outer pressure assembly 1-6 are threaded onto each interface on the lower connector end face inside the outer casing 1-10.

[0035] In addition to controlling the flow rate of the main flow channel, the return code water nozzle 1-4 is installed on the main flow channel. The return code water nozzle 1-4 also communicates with the ground controller through high-speed return code.

[0036] like Figure 2 As shown. The return code water nozzle 1-4 includes a return code valve core 1-4-1, a return code outer tube 1-4-2, a return code transmission shaft 1-4-3, a return code coupling 1-4-5, and a return code motor 1-4-6. The structure of the return code water nozzle 1-4 is a 90° on / off valve structure. The on / off valve is formed by the return code valve core 1-4-1 and the return code outer tube 1-4-2. The return code valve core 1-4-1 is a 90° valve core with a valve hole arranged radially. The return code outer tube 1-4-2 is provided with a flow channel that communicates with the valve hole and the main flow channel. When the return code valve core 1-4-1 rotates to the point where the valve hole communicates with the flow channel, the on / off valve is open. When the return code valve core rotates to the point where the valve hole is perpendicular to the flow channel, the on / off valve is closed. The return code valve core can realize the opening and closing function of the on / off valve by rotating forward and backward in the return code outer tube 1-4-2. The return code outer tube 1-4-2 is inserted into the lower connector and communicates with the main flow channel, thereby controlling the flow of the main flow channel by opening and closing the on / off valve.

[0037] The return code motor 1-4-6 is driven and connected to one end of the return code coupling 1-4-5. The other end of the return code coupling 1-4-5 is connected to the return code drive shaft 1-4-3. The other end of the return code drive shaft 1-4-3 is connected to the return code valve core 1-4-1. The return code drive shaft 1-4-3 and the return code valve core 1-4-1 are installed inside the return code outer tube 1-4-2, which is located in the interface of the lower connector end face. An analog Hall sensor 1-4-4 is installed on the return code coupling 1-4-5 to detect the rotation of the return code motor 1-4-6. The unidirectional rotation of the return code motor outputs a signal through the analog Hall sensor 1-4-4. A channel is provided on the radial outer circumference of the return code outer tube 1-4-2, which communicates with the flow channel of the lower connector 1-1. The return code valve core 1-4-1 rotates radially inside the return code outer tube to realize the on / off valve structure. When the return-code water nozzle 1-4 is working, the return-code motor provides power output, which, through the return-code drive shaft connected to the return-code coupling 1-4-5, outputs torque to the return-code valve core 1-4-1. This causes the return-code valve core 1-4-1 to rotate 90° forward and backward in the return-code outer tube 1-4-2, thus opening and closing the channel and completing the rapid switching function of the valve. Simultaneously, a flow code is generated and fed back to the ground controller for communication. When the return-code water nozzle's valve is closed, the flow rate in the main flow channel is 0, the flow code is low, and the pressure code is high. When the return-code water nozzle's valve is open, flow passes through the main flow channel, the flow code is high, and the pressure code is low. The pressure code is detected by a ground pressure sensor.

[0038] See you again Figure 2 The regulating water nozzle 1-3 includes a regulating valve sleeve 1-3-1, a regulating valve core 1-3-2, a regulating outer pipe 1-3-3, a regulating drive shaft 1-3-4, a regulating coupling 1-3-5, a regulating motor 1-3-6, and a digital Hall sensor 1-3-7. The regulating motor 1-3-6 is driven and connected to one end of the regulating coupling 1-3-5. The other end of the coupling 1-3-5 is driven and connected to the regulating transmission shaft 1-3-4. The other end of the regulating transmission shaft 1-3-4 is nested inside the regulating valve core 1-3-2 and threadedly connected thereto. The regulating valve core 1-3-2 is fitted with a regulating valve sleeve 1-3-1. The regulating transmission shaft 1-3-4, the regulating valve core 1-3-2, and the regulating valve sleeve 1-3-1 are all fitted inside the regulating outer tube 1-3-3. The regulating motor 1-3-6 is fixed to the end of the regulating outer tube 1-3-3. The digital Hall sensor 1-3-7 is fixed to the tail of the regulating motor 1-3-6. The forward and reverse rotation of the regulating transmission shaft 1-3-4 drives the regulating valve core 1-3-2 to move axially back and forth inside the regulating valve sleeve 1-3-1. The end of the adjusting outer tube 1-3-3 is inserted into the interface threaded hole on the end face of the lower connector and is fixed to the secondary flow channel. The radial outer periphery of the adjusting outer tube 1-3-3 is provided with a channel that communicates with the flow channel of the lower connector 1-1.

[0039] like Figure 3As shown. The regulating valve sleeve 1-3-1 and regulating valve core 1-3-2 of the regulating nozzle cooperate to form a piston cylinder structure. The outer circumference of the regulating valve sleeve 1-3-1 has an outlet 131-1, which is an inverted conical opening. The outlet 131-1 is connected to the channel of the regulating outer pipe 1-3-3. The opening degree of the outlet is determined by the movement distance of the regulating valve core in the regulating valve sleeve.

[0040] The regulating nozzle 1-3 is installed on the secondary flow channel to precisely regulate the flow rate of the main flow channel. The regulating valve core 1-3-2 moves axially back and forth in the regulating valve sleeve 1-3-1 to control the opening area of ​​the regulating valve sleeve 1-3-1, that is, the opening degree of the water outlet, to further regulate the water injection volume. A flow meter is installed at the front end of the regulating nozzle 1-3. The real-time detection feedback from the flow meter is sent to the central control board assembly to gradually achieve fine water injection.

[0041] A differential pressure flow meter is also installed at the front end of the return code water nozzles 1-4. The differential pressure flow meter is used to detect the water flow rate of the main channel. The forward and reverse rotation of the return code motor realizes the opening and closing function of the switch valve, thereby realizing the flow on and off, and then feeding back the flow change to the ground controller, forming a high-speed return code communication with the ground controller.

[0042] When the faucet 1-4 communicates with the ground controller via high-speed return code communication, the intelligent water distributor, upon receiving the ground flow reading command, converts the real-time flow of the faucet 1-4 into an action command. This command controls the return code motor to drive the return code transmission shaft 1-4-3, which in turn provides torque to rotate the return code valve core 1-4-1. The valve core 1-4-1 then performs an on / off action, closing or opening the channel of the return code outer pipe 1-4-2. The rotation of the return code valve core within the return code outer pipe 1-4-2 controls the change in the main channel flow rate and the on / off duration. The flow signal, representing the injection flow rate, is transmitted to the ground controller via a differential pressure flow meter, where software analyzes and calculates the real-time flow data.

[0043] When the regulating nozzle 1-3 communicates with the ground controller, the ground controller sends pressure and flow pulse commands. After receiving the commands, the main control board assembly 1-8 controls the regulating motor to output power to the regulating drive shaft 1-3-4. The regulating drive shaft 1-3-4 and the regulating valve core 1-3-2 control the opening of the regulating valve core 1-3-2 and the opening of the regulating valve sleeve 1-3-3, thereby precisely controlling the opening and flow of the regulating nozzle 1-3.

[0044] like Figure 4As shown. The main control board assembly 1-8 includes an MCU and peripheral circuit modules. Upon power-up, the MCU and peripheral circuit modules are connected to a battery power supply and battery voltage detection circuit module, a dual-motor drive overcurrent detection circuit module, an analog Hall effect measurement circuit module, a digital Hall effect measurement circuit module, and a data storage module. The MCU and peripheral modules primarily maintain the normal operation of the MCU. The battery power supply and battery voltage detection circuit module primarily provides power to the MCU, regulating motors 1-3-6, and the return code motor. The voltage detection circuit module detects battery power. The dual-motor drive overcurrent detection circuit module primarily drives the return code water nozzle 1-4 and regulating water nozzle 1-3, and detects the current during the rotation of the regulating water nozzle to prevent damage to the regulating motor 1-3-6 due to excessive current. The digital Hall effect measurement circuit module is only activated when the regulating water nozzle is activated, and can measure the travel distance of the limit switch of regulating water nozzle 1-3, controlling the opening and closing of the regulating water nozzle via the limit switch. The analog Hall effect measurement circuit module is only activated when the return code water nozzle 1-4 is activated, and can control the opening and closing of the return code water nozzle. The data storage modules are used to store data such as external pressure, internal pressure, flow rate, temperature, and the opening degree of the water tap.

[0045] The intelligent water distributor of this invention collects data from the internal pressure sensor and temperature sensor after each wake-up. Compared with the previous water distributor that collected data from the internal pressure sensor, external pressure sensor, post-hole pressure sensor, and temperature sensor, the data collection time after each wake-up is reduced to half. At the same time, after the intelligent water distributor is woken up, it does not collect data from the analog Hall sensor 1-4-4 and the digital Hall sensor 1-3-7. The analog Hall sensor 1-4-4 and the digital Hall sensor 1-3-7 are only activated when the regulating motor 1-3-6 and the return code motor are rotating, reducing the wake-up current to 6mA. The digital Hall sensor is only activated when the regulating faucet 1-3 is activated, and the analog Hall sensor 1-4-4 is only activated when the return code faucet is activated. The data storage module stores data every half hour, storing data such as external pressure, internal pressure, flow rate, temperature, and regulating faucet opening.

[0046] The dual-pulse high-speed wavecode intelligent water dispenser of this invention employs a dual-nozzle structure. The return-code water nozzle 1-4 and the regulating water nozzle 1-3 are independent of each other. Both the return-code water nozzle 1-4 and the regulating water nozzle 1-3 are powered by eight motor batteries, while the main control board assembly is powered by one circuit board battery. In the main control board assembly 1-8, a dual-motor drive overcurrent detection circuit module controls the switching of the regulating water nozzle 1-3 via one regulating motor 1-3-6, which closes the regulating water nozzle 1-3 via a limit switch. The other return-code motor controls the opening of the return-code water nozzle 1-4, which closes via an analog Hall sensor 1-4-4.

[0047] like Figure 5As shown. The dual-motor drive overcurrent detection circuit module includes a dual-motor control circuit, which consists of an adjustment motor drive circuit and a return code motor drive circuit. The adjustment motor drive circuit controls the operation of adjustment motors 1-3-6, and the return code motor drive circuit controls the operation of the return code motor. The adjustment motor drive circuit includes NMOS transistors Q1, Q2, Q3, and Q4, and transistors Q5-Q7. NMOS transistors Q1, Q4, Q2, and Q3 are connected to the adjustment motors, and the adjustment motor drive circuit controls the adjustment motors to control the adjustment nozzles 1-3. The return code motor drive circuit includes PMOS transistor Q9, transistors Q8 and Q10. PMOS transistors Q9 and Q8 are connected to the return code motors, and the return code motor drive circuit controls the return code motors 1-4-6 to control the return code nozzles 1-4.

[0048] The regulating motor drive circuit includes both a regulating nozzle forward rotation drive control unit and a regulating nozzle reverse rotation drive control unit. The regulating nozzle forward rotation drive control unit includes an NPN transistor Q6, a PNP transistor Q5, a PMOS transistor Q1, and an NMOS transistor Q4. When the nozzle needs to be opened, the MCU sends a high-level signal to the MP. When MP is high, the NPN transistor Q7 conducts. After Q7 conducts, the voltage is divided by resistors R6 and R9, turning on the PNP transistor Q5. Then, the voltage is divided by resistors R1, R4, R11, and R15, turning on the PMOS transistors Q1 and Q4, thus enabling the regulating motor 1-3-6 to rotate forward. The forward rotation of the regulating motor drives the regulating valve core 1-3-2 to move axially backward along the regulating valve sleeve 1-3-1, causing axial displacement between the regulating valve core 1-3-2 and the regulating valve sleeve 1-3-1.

[0049] The water tap reversal drive control unit includes NPN transistor Q6, PNP transistor Q5, PMOS transistor Q1, and NMOS transistor Q4. When it is necessary to close the water taps 1-3, the MCU of the main control board assembly 1-8 sends a high-level signal to MN. With MN high, NPN transistor Q8 conducts. After Q8 conducts, the voltage is divided by resistors R7 and R13, turning on PNP transistor Q6. Then, through resistors R2, R5, R12, and R16, the voltage is divided again, turning on PMOS transistors Q2 and NMOS transistor Q3, thus reversing the water tap motors 1-3-6. Resistors R18 and R19 are two voltage divider resistors, and resistor R20 is a sampling resistor. Whenever the water tap motors 1-3-6 rotate, the voltage during rotation can be collected and fed back to the MCU in a timely manner, providing protection for both motors.

[0050] When the well needs to send a return code to the surface, the regulating water nozzle 1-3 must first be closed. The MCU on the main control board assembly 1-8 sends a high level to MN (MCU excitation signal). When MN is high, NPN transistor Q8 will conduct. After transistor Q8 conducts, the PNP transistor Q6 conducts after voltage division through resistors R7 and R13. Then, through voltage division through resistors R2, R5, R12, and R16, PMOS transistor Q2 and NMOS transistor Q3 are turned on, thereby controlling the regulating motor to reverse.

[0051] The regulating motor 1-3-6 reverses its output power to the regulating drive shaft 1-3-4. The regulating drive shaft 1-3-4 drives the regulating valve core 1-3-2 to extend axially forward, causing axial displacement between the regulating valve core 1-3-2 and the regulating valve sleeve 1-3-1 to close the channel, thus closing the regulating nozzle 1-3. During the entire process of closing the regulating nozzle 1-3, the digital Hall sensor 1-3-7 is activated.

[0052] As shown in Figure 6(a), the digital Hall effect measurement circuit module includes a transistor Q2, an RC filter circuit composed of resistor R4 and capacitor C4, a current-limiting resistor R2, a resistor R7, and a capacitor C2.

[0053] On the main control board components 1-8, the MCU sends a low-level signal to DHKZ (MCU excitation signal). This signal is then filtered by an RC filter circuit and sent to the MCU's interrupt pin, enabling measurement by the digital Hall sensor 1-3-7. The digital Hall sensor 1-3-7 adjusts the opening of the water tap 1-3. Once the water tap is closed, the MCU sends a high-level signal to DHKZ (MCU excitation signal), and subsequently, the return code water tap 1-4 activates. (See also...) Figure 4 The MCU sends a high-level signal to FM (MCU excitation signal). When FM is high, transistor Q10 turns on. Then, through resistors R3 and R8, the voltage is divided, and PMOS transistor Q9 turns on. The return code motor 1-4-6 of the return code water nozzle 1-4 rotates. The return code motor 1-4-6 drives the return code valve core 1-4-1 to rotate and generate an angular displacement with the return code outer tube 1-4-2, thus opening the return code water nozzle to the external channel for water to flow out.

[0054] When the circuit is energized for the preset time, the return code motor 1-4-6 continues to rotate, outputting power to drive the return code valve core 1-4-1 to continue rotating and generate an angular displacement with the return code outer pipe 1-4-2, thus closing the outlet of the return code water nozzle 1-4 to cut off the water flow and create a flow difference.

[0055] When the return code water nozzle is working, the return code valve core 1-4-1 and the return code outer tube 1-4-2 rotate 180° to complete the rapid opening and closing of the return code water nozzle 1-4 in 2 seconds, realizing the on / off valve function of the return code water nozzle 1-4.

[0056] As shown in Figure 6(b), the digital Hall effect measurement circuit module includes an RC filter circuit composed of transistor Q1, resistor R3 and capacitor C3, a voltage divider acquisition circuit composed of resistor R5 and resistor R8, and resistors R1 and R6. Resistor R6 is connected in series at one end of the base of transistor Q1, and resistor R1 is connected in series at one end of the collector of transistor Q1.

[0057] The analog Hall effect measurement circuit is only activated by the AHKZ (MCU excitation signal) when the return code motor 1-4-6 of the return code water nozzle 1-4 rotates. At this time, the MCU sends a low level to the AHKZ (MCU excitation signal). After passing through the RC filter circuit and the voltage divider of resistors R5 and R8, the signal is transmitted to the MCU analog acquisition pin and a certain voltage threshold is set. When the voltage is higher than the acquisition voltage threshold, the return code water nozzle 1-4 stops rotating. After the return code water nozzle 1-4 has finished working, the MCU sends a low level to the FM (MCU excitation signal) and a high level to the AHKZ (MCU excitation signal), and the analog Hall sensor 1-4-4 stops working.

[0058] The dual-pulse high-speed wavecode intelligent water distributor of this invention updates a set of flow and pressure data every day, with real-time data updates. To further reduce the power consumption of the intelligent water distributor and achieve high-speed code return from downhole to the surface, the communication protocol from downhole to the surface of this invention adopts a hexadecimal encoding method. The basic principle of this communication protocol is to minimize the execution time while fully ensuring the reliability of execution.

[0059] The external pressure and flow rate (external pressure refers to the actual formation pressure measured downhole, and flow rate refers to the flow rate measured downhole) are represented by 3-digit numbers (D1 to D3), where D1 and D2 are the tens and units digits, and D3 is the decimal place. The encoding method is as follows: a set of signal codes consists of a start code + a data code + an end code. The downhole return code signal starts with a 2-second fixed-time low-level signal (S is a unit of time measurement, defined as 20 seconds). The downhole data code then uses hexadecimal encoding, with a data range of 0 to 100. The precision requirement is to retain 1 decimal place, so it can be represented by a 2-digit hexadecimal data, which also consumes less resources. After the data code ends, a low-level signal lasting 2 seconds serves as the end code, concluding the signal transmission. Adding the data frame header and end bit, the flow rate code switching is achieved through a rapid 180-degree forward and reverse switching of the return code nozzles 1-4. The information code sequence is fixed at 10 bits. The minimum return code bit for the flow rate code is 20 seconds, so the return code time is 20 * 12 seconds = 340 seconds, which equals 4 minutes. For example, if the return code flow rate is 15.3 cubic meters per day, it needs to be converted from 15.3 * 10 = 153. The decimal 153 is 0x99 in hexadecimal, and then to binary (Ob10011001). The flow rate code return code pattern is as follows: Figure 7 As shown.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual pulse high velocity wave code smart water distributor characterized in that: The utility model provides an external casing (1-10) is connected with upper joint (1-12) and lower joint (1-1) respectively on both ends, and the lower joint (1-1) is provided with regulating water nozzle (1-3) and return code water nozzle (1-4), and the return code water nozzle (1-4) generates flow code feedback to ground control instrument to realize communication through the quick switching of switch valve, and the return code water nozzle (1-4) includes return code valve core (1-4-1), return code outer tube (1-4-2) and return code motor (1-4-6), the return code valve core (1-4-1) is nested in the return code outer tube (1-4-2) and forms switch valve, and the return code valve core (1-4-1) rotates in the return code outer tube (1-4-2) and completes the switching of switch valve, the output end of return code motor (1-4-6) is drivenly connected the return code valve core (1-4-1), the radial direction of return code valve core (1-4-1) is provided with valve hole, the return code outer tube (1-4-2) is provided with the passageway that cooperates with return code valve core (1-4-1), and return code motor (1-4-6) drives the return code valve core (1-4-1) in the return code outer tube (1-4-2) and positive and negative rotation drives the valve hole and the passageway through or close, the return code valve core (1-4-1) is 90 degrees valve core, and the passageway is switched when the return code valve core (1-4-1) is 90 degrees in the return code outer tube (1-4-2) and positive and negative rotation. Wherein, when the switch valve of the return code water nozzle (1-4) is closed, the flow of the main flow passage is 0, the flow code is low level, and the pressure code is high level; when the switch valve of the return code water nozzle (1-4) is opened, the main flow passage has flow passing through, the flow code is high level, and the pressure code is low level.

2. The dual pulse high velocity wave code smart water distributor as claimed in claim 1, wherein: The communication protocol between the return code water nozzle (1-4) and the ground control instrument is hexadecimal coding, and the coding is composed of start code, data code and end code.

3. The dual pulse high velocity wave code smart water distributor as claimed in claim 2, wherein: When the return code water nozzle (1-4) communicates with the ground control instrument, the downhole return code signal uses 2S fixed time low level as the start code, then uses hexadecimal coding for the data code, the data range is 0-100, and uses a 2-bit hexadecimal data to represent; after the data code, 2S time low level is used as the end code to end this signal transmission, and the switching of the flow code type is realized by the switching of the switch valve of the return code water nozzle, the information code element sequence is fixed as 10 code elements, and the minimum code element of the flow code return code is 20S.

4. The dual pulse high velocity wave code smart water distributor as claimed in claim 1, wherein: An analog hall sensor (1-4-4) is arranged on the output end of the return code motor (1-4-6).

5. The dual pulse high velocity wave code smart water distributor as claimed in claim 4, wherein: The adjusting water nozzle (1-3) comprises an adjusting valve sleeve (1-3-1), an adjusting valve core (1-3-2), an adjusting outer tube (1-3-3) and an adjusting motor (1-3-6), the adjusting valve core (1-3-2) is embedded in the adjusting valve sleeve (1-3-1), the outer periphery of the adjusting valve sleeve (1-3-1) is provided with a water outlet (131-1), and the adjusting motor (1-3-6) drives the adjusting valve core (1-3-2) to move axially in the adjusting valve sleeve (1-3-1) to control the opening area of the water outlet (131-1).

6. The dual pulse high velocity wave code smart water distributor as claimed in claim 5, wherein: The tail part of the adjusting motor (1-3-6) is provided with a digital Hall sensor (1-3-7).

7. The dual pulse high velocity wave code smart water distributor as claimed in claim 6, wherein: The outer protection cylinder (1-10) is provided with a main control assembly (1-8), the main control assembly (1-8) comprises a double-motor driving overcurrent detection circuit module, and the double-motor driving overcurrent detection circuit module is used for adjusting and controlling the on-off of the adjusting water nozzle (1-3) and the return code water nozzle (1-4) respectively.

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