Downhole efficient wave code water injection device and control system

Abstract

The invention relates to the field of logging control systems, and provides an underground efficient wave code water injection device which comprises a check ring, a PWM speed regulation system assembly, a motor assembly, a battery assembly, a circuit assembly, a pressure flow sensing assembly, a body and a water outlet. A radial water outlet is formed in the surface of the body; the end of the body is fixedly connected with a circuit assembly. The end part of the circuit assembly is fixedly connected with a motor assembly; the end part of the motor assembly is fixedly connected with a PWM speed regulation system assembly; the end part of the PWM speed regulation system assembly is fixedly connected with a baffle ring; the outer circle surface of the circuit assembly is fixedly connected with a pressure flow sensing assembly. The two ends of the battery assembly are fixed to the outer circle surface of the PWM speed regulation system assembly and the outer circle surface of the circuit assembly respectively. The independent motor speed regulation circuit is additionally arranged in the control system, the rotating speed of the motor is changed in different modes, and the requirements of two working modes of flow fine regulation and wave code rapid coding data efficient transmission can be met at the same time.

Description

Technical Field

[0001] The invention relates to an underground high-efficiency wave code water injection device and a control system, belonging to the field of well logging control systems. Background Art

[0002] Smart oilfields put forward the requirements of low energy consumption, low cost and high integration design of the system. The water injection wells of major oilfields are gradually realizing the transition from the third-generation cable-type measuring and adjusting instrument to the fourth-generation intelligent layered fine water injection integrated system measuring and adjusting stage. In order to improve the efficiency of downhole operations and reduce operating costs and risks, the future will inevitably change from cable connection to cableless communication. At present, the cableless communication technology represented by the Changqing Oilfield wave code system has been widely used, with low operating costs and low failure risks, and has been highly recognized by users. The flow size is controlled by the motor to control the opening size of the water nozzle in the dispenser. The flow control accuracy is high, the motor speed is slow, and the injection volume is finely adjusted. In addition, the same motor is used to control the fixed opening size of the water nozzle to generate pressure waves and realize data coding and uploading. The Chinese invention patent with patent number CN201811107213.9 discloses a ground control device for fluid wave code communication signals of water injection wells, which can establish fluid wave codes, thereby converting control instructions into fluid wave codes, and jointly realize accurate control of water injection pressure to achieve the purpose of fine water distribution.

[0003] However, the inventors of the present invention found that the prior art has the following problems: due to the slow speed of the motor, it takes about 1 hour to code a single data wave code, and the coding time for multiple groups of data is longer when uploading, the battery loss is large, and the efficiency is low. Since disposable batteries are used for power supply underground, the service life of the product will be greatly reduced. If a fast switch is added to realize wave code coding, the space is limited and the underground structure will become very complicated. In addition, it is necessary to add a motor and circuit control, which greatly increases the manufacturing cost and is not conducive to large-scale promotion and application. Therefore, improvements are needed. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an underground efficient wave code water injection device and control system, which can use the same motor to achieve fine adjustment of water volume and rapid wave code coding at the same time.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides an underground high-efficiency wave code water injection device, comprising a gear ring, a PWM speed regulation system component, a motor component, a battery component, a circuit component, a pressure flow sensor component, a body and a water outlet; a radial water outlet is provided on the surface of the body, and the water outlet is elliptical in shape; a circuit component is fixedly connected to the end of the body, the body is in a circular shaft shape, and annular sealing gasket grooves are provided on the surface of the body at both ends of the water outlet; a motor component is fixedly connected to the end of the circuit component; a PWM speed regulation system component is fixedly connected to the end of the motor component; a gear ring is fixedly connected to the end of the PWM speed regulation system component; a pressure flow sensor component is fixedly connected to the outer cylindrical surface of the circuit component; two ends of the battery component are respectively fixed to the outer cylindrical surface of the PWM speed regulation system component and the outer cylindrical surface of the circuit component; the diameter of the gear ring is larger than the diameter of the motor component.

[0007] The speed regulation range of the motor in the motor assembly is 2 - 12r / min.

[0008] The adjustment accuracy range of the water outlet is 0.5-1.5m 3 / d.

[0009] A downhole high-efficiency wave code water injection control system, characterized in that it includes a main control CPU system, a motor drive circuit, a PWM speed regulation system, a water volume regulation mechanism, a flow fine adjustment system and a wave code fast coding system; the output end of the main control CPU system is electrically connected to the motor drive circuit and the input end of the PWM speed regulation system respectively; the output end of the PWM speed regulation system is electrically connected to the input end of the motor drive circuit; the output end of the motor drive circuit is electrically connected to the input end of the flow fine adjustment system and the wave code fast coding system respectively.

[0010] The main control CPU system is connected to the data acquisition system via a wireless network.

[0011] The data acquisition system includes a pressure sensor and a flow sensor to collect data.

[0012] The power supply system supplies power to the main control CPU system, motor drive circuit, PWM speed regulation system, water volume regulation mechanism, flow fine adjustment system, wave code fast coding system and data acquisition system in the control system.

[0013] The beneficial effects of the present invention are as follows: by adding an independent motor speed control circuit in the control system and changing the motor speed in different modes, the requirements of two working modes, namely, fine flow regulation and efficient transmission of wave code fast coding data, can be met at the same time, thereby greatly improving the data transmission rate, extending the service life of the system, and reducing the promotion cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of an underground high-efficiency wave code water injection device; Figure 2 It is a control system diagram of an underground high-efficiency wave code water injection device.

[0015] In the figure: 1- gear ring, 2- PWM speed regulation system component, 3- motor component, 4- battery component, 5- circuit component, 6- pressure flow sensor component, 7- main body, 8- water outlet, 9- main control CPU system, 10- motor drive circuit, 11- PWM speed regulation system, 12- water volume adjustment mechanism, 13- flow fine adjustment system, 14- wave code fast coding system, 15- data acquisition system, 16- power supply system. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0017] The first embodiment of the present invention relates to Figure 1 The downhole high-efficiency wave code water injection device shown in the figure comprises a gear ring 1, a PWM speed regulation system component 2, a motor component 3, a battery component 4, a circuit component 5, a pressure flow sensor component 6, a body 7 and a water outlet 8; a radial water outlet 8 is provided on the surface of the body 7, and the water outlet 8 is elliptical in shape; the circuit component 5 is fixedly connected to the end of the body 7, the body 7 is in a circular shaft shape, and an annular sealing gasket groove is provided on the surface of the body 7 at both ends of the water outlet 8; the motor component 3 is fixedly connected to the end of the circuit component 5; the PWM speed regulation system component 2 is fixedly connected to the end of the motor component 3; the gear ring 1 is fixedly connected to the end of the PWM speed regulation system component 2; the circuit component The outer circumferential surface of the component 5 is fixedly connected with a pressure flow sensor component 6; the two ends of the battery component 4 are respectively fixed on the outer circumferential surface of the PWM speed regulation system component 2 and the outer circumferential surface of the circuit component 5; the diameter of the gear ring 1 is larger than the diameter of the motor component 3; the gear ring 1 is used to position the entire device, and the PWM speed regulation system component 2 is used to regulate the speed of the motor component 3; the motor component 3 provides power for the opening size of the water outlet 8; the battery component 4 provides electrical energy to the motor component 3; the circuit component 5 provides circuit switching; the pressure flow sensor component 6 is used to collect pressure and flow data; the main body 7 is the supporting skeleton of the entire device; the water outlet 8 is an actuator for finely adjusting the flow.

[0018] The speed regulation range of the motor in the motor assembly 3 is 2 - 12r / min, which is compatible with the motor speed in the water volume regulation mode and the wave code printing mode.

[0019] The adjustment accuracy range of the water outlet 8 is 0.5-1.5m 3 / d, which satisfies the water nozzle adjustment mechanism to finely adjust the injection volume.

[0020] A second embodiment of the present invention relates to Figure 2The shown downhole high-efficiency wave code water injection control system comprises a main control CPU system 9, a motor drive circuit 10, a PWM speed regulation system 11, a water volume regulating mechanism 12, a flow fine allocation system 13 and a wave code fast coding system 14; the output end of the main control CPU system 9 is electrically connected to the input end of the motor drive circuit 10 and the PWM speed regulation system 11 respectively; the output end of the PWM speed regulation system 11 is electrically connected to the input end of the motor drive circuit 10; the output end of the motor drive circuit 10 is electrically connected to the input end of the flow fine allocation system 13 and the wave code fast coding system 14 respectively; the main control CPU system 9 is the "brain" of the whole device, which is used to control other systems; the motor drive circuit 10 is used to switch the operational amplifier circuit; the PWM speed regulation system 11 adjusts the output voltage of the motor drive circuit 10; the water volume regulating mechanism 12 is the execution part for water volume regulation; the flow fine allocation system 13 is used to finely allocate the flow.

[0021] The main control CPU system 9 is connected to the data acquisition system 15 via a wireless network. Wireless communication of data is an inevitable trend of the fourth generation intelligent stratified fine water injection integrated system.

[0022] The data acquisition system 15 includes a pressure sensor and a flow sensor to collect data, and transmits the collected pressure data and flow data to the main control CPU system 9 in real time to form a closed-loop feedback to improve the control accuracy of the flow.

[0023] The power supply system 16 supplies power to the main control CPU system 9, the motor drive circuit 10, the PWM speed regulation system 11, the water volume regulation mechanism 12, the flow fine adjustment system 13, the wave code fast coding system 14 and the data acquisition system 15 in the control system; the power supply system 16 can ensure the power supply and normal operation of the entire device; the wave code fast coding system 14 can enable the system to generate a pressure pulse signal and realize wireless transmission of pressure wave data according to the coding rules.

[0024] Based on this, a typical working process of the present invention is: When the present invention is implemented, Figure 1-2 As shown, when it is necessary to adjust the injection amount according to the target flow, it is necessary to reduce the motor speed in the motor assembly 3 to 4r / min, reduce the adjustment step, and realize fine adjustment of the flow. The main control CPU system 9 sends instructions to the PWM speed regulation system 11, and the PWM speed regulation system 11 adjusts and controls the motor drive circuit 10 to reduce the motor output voltage. When the voltage reaches the speed requirement, the motor power switch is turned on to start the motor, and the water volume adjustment mechanism 12 is controlled to finely adjust the injection amount, so that the water volume regulation accuracy reaches 1㎥ / d.

[0025] When wave code wireless communication is required, the motor speed in the motor assembly 3 needs to be increased to 10r / min to achieve rapid valve opening and closing coding to generate pressure pulses. The main control CPU system 9 sends instructions to the PWM speed control system 11, and then the PWM speed control system 11 adjusts and controls the motor drive circuit 10 to increase the motor output voltage. When the voltage reaches the speed requirement, the motor power switch is turned on to start the motor, and the water volume adjustment mechanism 12 is controlled to move quickly to achieve rapid wave code coding, so that the system generates a pressure pulse signal, and realizes wireless transmission of pressure wave data according to the coding rules.

Claims

1. An underground high-efficiency wave code water injection device, characterized in that: The invention comprises a gear ring (1), a PWM speed regulating system component (2), a motor component (3), a battery component (4), a circuit component (5), a pressure flow sensor component (6), a body (7) and a water outlet (8); a radial water outlet (8) is provided on the surface of the body (7), and the water outlet (8) is elliptical in shape; the end of the body (7) is fixedly connected with the circuit component (5), the body (7) is in the shape of a circular shaft, and the surface of the body (7) at both ends of the water outlet (8) is provided with annular sealing gasket grooves; the end of the circuit component (5) is fixedly connected with the motor component (3); the end of the motor component (3) is fixedly connected with the PWM speed regulating system component (2); the end of the PWM speed regulating system component (2) is fixedly connected with the gear ring (1); the outer circumferential surface of the circuit component (5) is fixedly connected with the pressure flow sensor component (6); the two ends of the battery component (4) are respectively fixed to the outer circumferential surface of the PWM speed regulating system component (2) and the outer circumferential surface of the circuit component (5); the diameter of the gear ring (1) is larger than the diameter of the motor component (3).

2. The downhole high-efficiency wave code water injection device according to claim 1, characterized in that: The speed regulation range of the motor in the motor assembly (3) is 2 - 12 r / min.

3. The downhole high-efficiency wave code water injection device according to claim 1, characterized in that: The adjustment accuracy range of the water outlet (8) is 0.5-1.5m 3 / d.

4. An underground high-efficiency wave code water injection control system, characterized in that: The invention comprises a main control CPU system (9), a motor drive circuit (10), a PWM speed regulation system (11), a water volume regulating mechanism (12), a flow rate fine adjustment system (13) and a wave code fast coding system (14); the output end of the main control CPU system (9) is electrically connected to the input end of the motor drive circuit (10) and the PWM speed regulation system (11); the output end of the PWM speed regulation system (11) is electrically connected to the input end of the motor drive circuit (10); and the output end of the motor drive circuit (10) is electrically connected to the input end of the flow rate fine adjustment system (13) and the wave code fast coding system (14).

5. The downhole high-efficiency wave code water injection control system according to claim 4, characterized in that: It also includes a data acquisition system (15), and the main control CPU system (9) is connected to the data acquisition system (15) via a wireless network.

6. The downhole high-efficiency wave code water injection control system according to claim 5, characterized in that: The data acquisition system (15) comprises a pressure sensor and a flow sensor for collecting data.

7. The downhole high-efficiency wave code water injection control system according to claim 4, characterized in that: The invention also comprises a power supply system (16); the power supply system (16) supplies power to a main control CPU system (9), a motor drive circuit (10), a PWM speed regulation system (11), a water volume regulation mechanism (12), a flow rate fine adjustment system (13), a wave code fast coding system (14) and a data acquisition system (15) in the control system.

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