An oil well information monitoring system

Abstract

An oil well information monitoring system of the present invention includes: an MCU main control module, a power processing module, a sensor module, a storage module, a power supply module, a digital input / output module, an analog quantity acquisition module, a ZigBee module, and a monitoring terminal; the MCU main control module is respectively connected to the power processing module, the sensor module, the storage module, the power supply module, the digital input / output module, the analog quantity acquisition module, and the ZigBee module, and the ZigBee module is wirelessly connected to the monitoring terminal; the input end of the power processing module is connected to a three-phase four-wire system wire.

Description

Technical Field

[0001] The present invention belongs to the technical field of information monitoring and relates to an oil well information monitoring system. Background Art

[0002] An oil field consists of oil wells of different scales. It is crucial for the safe and efficient production of the oil field to master the parameters of oil wells in real time, such as temperature, pressure, flow rate, current, voltage and other related parameters, and to understand the operating conditions of the oil wells. Due to the wide distribution range of oil wells, the distance between adjacent oil wells ranges from a few meters to dozens of kilometers, and the locations of many oil wells are very remote and the traffic is extremely inconvenient. In harsh weather conditions, relying on the traditional manual inspection method to collect these data has low efficiency, cannot ensure the real-time and accuracy of oil field monitoring, and poses a great threat to the safety of staff.

[0003] With the modernization transformation and digital construction of major domestic oil fields, most oil wells have adopted oil well information monitoring systems to monitor the status of oil wells and equipment between well groups in real time. At present, there are many types of oil well information monitoring systems on the market. Most of them use RTU with a PLC as the main controller. Such products have relatively high costs, and there are problems such as corrosion and humidity damage when the equipment is placed in a harsh outdoor environment for a long time. Such products are being replaced by low-cost, high-efficiency products designed based on single-chip microcomputer embedded technology and are conducive to maintenance.

[0004] Due to the remote location and wide distribution range of oil wells, the power supply system grid has problems such as low power factor, long line length, and large load. And through on-site actual research and investigation, it is found that because the wire line is long and the wire is loose, in windy weather, for the three-phase four-wire electricity, when the wires between the line and the phase are blown by the wind, they are easily touched together, causing the 220V voltage to become 380V voltage and damaging the entire oil well information monitoring system.

[0005] Since the oil well information monitoring equipment is placed outdoors for a long time and the on-site environment is harsh, the monitoring system is often easily damaged by lightning strikes and rain.

[0006] At present, most of the data transmission methods of on-site equipment in oil fields mostly use wired methods or digital radios, and the on-site wiring is chaotic.

[0007] The oil well information monitoring system uploads information such as the electrical parameters, temperature, and pressure of the oil well to the production monitoring center, which is an important solution for monitoring oil well information in major oil fields across the country. At present, there are still many drawbacks in the existing oil well monitoring systems. Most R & D personnel only design products according to the design requirements and only achieve the basic functions, but do not carefully consider the actual problems on site. Therefore, there is great room for improvement in the oil field information monitoring system. Summary of the Invention

[0008] To solve the above technical problems, the objective of the present invention is to provide an oil well information monitoring system. The system transmits the collected information to the monitoring terminal via ZigBee wireless communication, completely abandoning the traditional method of solely using wired or digital radio to monitor oil wells, and realizing an oil well information monitoring system with comprehensive functions, lightning protection function, and wide voltage input range.

[0009] The present invention provides an oil well information monitoring system, including: an MCU main control module, a power quantity processing module, a sensor module, a storage module, a power supply module, a digital quantity module, an analog quantity acquisition module, a ZigBee module, and a monitoring terminal.

[0010] The MCU main control module is respectively connected to the power quantity processing module, the sensor module, the storage module, the power supply module, the digital quantity module, the analog quantity acquisition module, and the ZigBee module. The ZigBee module is wirelessly connected to the monitoring terminal. The input end of the power quantity processing module is connected to a three-phase four-wire system wire.

[0011] In the oil well information monitoring system of the present invention, the sensor module includes: a gas sensor, a pressure sensor, a flow sensor, and a temperature sensor.

[0012] In the oil well information monitoring system of the present invention, the MCU main control module, the power quantity processing module, the storage module, the power supply module, the digital quantity module, the analog quantity acquisition module, and the ZigBee module are arranged in a cabinet. The gas sensor, the pressure sensor, the flow sensor, the temperature sensor, and the three-phase four-wire system wire are connected to the terminal block in the cabinet through leads. The terminal block adopts a WAGO spring pressure connection terminal.

[0013] In the oil well information monitoring system of the present invention, lightning protection circuits are provided at the input port of the power supply module, the output port of the ZigBee module, the input port of the three-phase four-wire system wire, and the input port of the sensor module.

[0014] In the oil well information monitoring system of the present invention, the monitoring terminal includes a ZigBee coordinator and a main controller. The ZigBee module communicates wirelessly with the ZigBee coordinator.

[0015] In the oil well information monitoring system of the present invention, the power supply module includes: a switching power supply, a circuit breaker, and a surge protector respectively connected to the switching power supply. The voltage input range that the switching power supply can withstand is between 135V and 418V, and it can convert the input AC voltage into 12V, 5V, and 3.3V DC voltages required by the system for different parts of the circuit to use.

[0016] In the oil well information monitoring system of the present invention, the circuit breaker is an electromagnetic hydraulic circuit breaker.

[0017] In the oil well information monitoring system of the present invention, the power processing module is a three-phase multifunctional power metering chip.

[0018] In the oil well information monitoring system of the present invention, the analog quantity acquisition module is connected to the oil well dynamometer, and the acquired signals are processed and then transmitted to the MCU main control module.

[0019] In the oil well information monitoring system of the present invention, the digital input / output module includes: an STM32 chip and two relays. The STM32 chip is connected to the MCU main control module and drives the relays according to the instructions of the MCU main control module to realize the opening and closing of the oil well on-site equipment remotely.

[0020] An oil well information monitoring system of the present invention has at least the following beneficial effects:

[0021] 1. It has a wide input voltage range, ensuring that the wires between the line and phase of the power supply system can withstand a voltage of 380V even if they are blown together by the wind.

[0022] 2. It has a wide voltage monitoring range, ensuring that the three-phase power acquisition port can withstand a voltage of 380V even if the wires between the line and phase are blown together by the wind.

[0023] 3. All ports have lightning protection functions to ensure that outdoor lightning-struck equipment is not damaged.

[0024] 4. It has many functions and can meet most of the functions required on the oil field site.

[0025] 5. Spring pressure terminals are adopted. Traditional screw terminals are fixed by elastic sheet pressing, which is easy to fall off after being vibrated. Spring pressure terminals have a certain stress to ensure that the equipment will not loosen and fall off after being placed outdoors for a long time.

[0026] 6. ZigBee modules are used to wirelessly transmit data, abandoning the traditional method of using only wired or digital radio stations to monitor oil wells.

[0027] 7. It can not only control the opening and closing of the circuit breaker, but also monitor the opening and closing state of the on-site circuit breaker, and transmit the circuit breaker state to the monitoring terminal for alarm.

[0028] 8. The circuit board is potted to prevent corrosion and moisture, increasing the reliability and service life of the circuit board.

[0029] 9. The protection level of the equipment shell is IP54, preventing dust from completely preventing dust from entering, but the amount of dust entering will not affect the normal operation of the electricity. Prevent splashing water from entering. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a structural block diagram of an oil well information monitoring system of the present invention;

[0031] Figure 2 It is a schematic diagram of the cabinet of an oil well information monitoring system of the present invention. Specific embodiments

[0032] As Figure 1 shown, an oil well information monitoring system of the present invention includes: an MCU main control module 1, a power processing module 2, a sensor module 3, a storage module 4, a power supply module 5, a digital input / output module 6, an analog acquisition module 7, a ZigBee module 8, and a monitoring terminal 9.

[0033] The MCU main control module 1 is respectively connected to the power processing module 2, the sensor module 3, the storage module 4, the power supply module 5, the digital input / output module 6, the analog acquisition module 7, and the ZigBee module 8. The ZigBee module 8 is wirelessly connected to the monitoring terminal 9. The input end of the power processing module 2 is connected to a three-phase four-wire system wire 10. The sensor module 3 includes: a gas sensor, a pressure sensor, a flow sensor, and a temperature sensor.

[0034] The MCU used in the MCU main control module 1 is an STM32F103RCT6 chip based on the Cotex-m3 core, which is responsible for communicating with other modules, processing the collected data, and controlling the peripheral circuit.

[0035] The storage module 4 uses a 24C04 erasable EEPROM produced by Microchip and is connected to the STM32 chip via the IIC bus, which is used to store programs and important intermediate data. As an extended memory, it can prevent the amount of collected data from being too large.

[0036] The MCU main control module 1, the power processing module 2, the storage module 4, the power supply module 5, the digital input / output module 6, the analog acquisition module 7, and the ZigBee module 8 are arranged in the cabinet. The gas sensor, the pressure sensor, the flow sensor, the temperature sensor, and the three-phase four-wire system wire 10 are connected to the terminal block in the cabinet through leads. The terminal block uses a WAGO spring pressure connection terminal to ensure that the leads will not fall off due to vibration. The terminal spacing of the strong power input part should be larger than that of the weak signal part.

[0037] Lightning protection circuits are provided at the input port of the power supply module 5, the output port of the ZigBee module 8, the input port of the three-phase four-wire system wire 10, and the input port of the sensor module 3.

[0038] The monitoring terminal 9 includes a ZigBee coordinator 91 and a main controller 92. The ZigBee module 8 communicates wirelessly with the ZigBee coordinator 91. Using the ZigBee module 8, the modules have the function of networking, and the data of the MCU main control module 1 is uploaded to the monitoring terminal 9.

[0039] The power supply module 5 includes: a switching power supply, a circuit breaker, and a surge protector that are respectively connected to the switching power supply. Due to the complex on-site power distribution conditions, because the wire lines are long and the wires are loose, in windy weather, for the three-phase four-wire power, when the wires between the phases are blown by the wind, they are prone to accidentally touch together, causing the 220V voltage to become 380V voltage. Therefore, the designed power supply module can withstand a wide input voltage range, and the power input range can be between 135V and 418V. Then, the input AC voltage is converted into 12V, 5V, and 3.3V DC voltages required by the system for different parts of the circuit to use. The circuit breaker is an electromagnetic hydraulic circuit breaker. The shrapnel of the ordinary shrapnel type circuit breaker expands and contracts with temperature and is greatly affected by temperature. The electromagnetic circuit breaker relies on electromagnetic induction to ensure that the circuit breaker can also be used in the case of large outdoor temperature differences. At the same time, it is combined with a surge protector to ensure the protection of the entire power supply system when struck by lightning and large current impacts.

[0040] The power quantity processing module 2, the sampling resistor, and the selection and design of all devices are designed according to the maximum input voltage of 380V, can withstand a relatively high voltage, and are designed with differential mode and common mode lightning protection circuits to prevent lightning from being introduced into the acquisition end interface and damaging the entire oil well monitoring system. The processing chip of the power quantity processing module 2 uses a three-phase multi-functional power quantity metering chip, which can collect relevant electrical parameters such as three-phase voltage, current, active power, reactive power, current change, power factor, positive and negative active electric energy, absolute and active electric energy, total active power, and net active electric energy.

[0041] The analog quantity acquisition module 7 can acquire 4mA - 20mA analog quantity current, and collect and process the analog signal through the operational amplifier and the AD conversion function built in the STM32 chip. The analog quantity acquisition module 7 is connected to the oil well dynamometer, and after processing the acquired signal, it is transmitted to the MCU main control module 1.

[0042] The digital input / output module 6 includes: an STM32 chip and two relays. The STM32 chip is connected to the MCU main control module 1, and drives the relays according to the instructions of the MCU main control module 1 to control the on and off of the circuit breaker, realizing the remote control of the opening and closing of the oil well on-site equipment.

[0043] In order to solve the problem that oil field equipment is placed outdoors in a harsh environment, although the ordinary oil well information monitoring system is placed in a protective shell, but after being exposed to wind and rain for a long time, the internal equipment is also prone to moisture and corrosion. To solve this problem, this oil field information monitoring system adopts the method of potting and encapsulation, and fills the special sealing glue into the made oil well information monitoring system, solving the problem of moisture and corrosion prevention of the circuit board.

[0044] Such as Figure 2As shown in the figure, the protection level of the equipment cabinet shell reaches IP33. The oil well monitoring board composed of the MCU main control module 1, the power processing module 2, the storage module 4, the digital input / output module 6, the analog acquisition module 7 and the ZigBee module 8, the circuit breaker, the surge protector, and the power supply board composed of the switching power supply are installed into the equipment cabinet through the guide rail for wiring. The sensor module 3 and the three-phase four-wire wire 10 are connected to the oil well monitoring board through leads. Considering impedance matching and interference problems, the lead length should not exceed 3 meters. At the same time, an antenna is installed outside the equipment cabinet and connected to the ZigBee module 8 through a feeder for wireless signal transmission.

[0045] After installing the hardware, power on and test the entire system to check whether the entire oil well monitoring system is operating normally. The oil well monitoring board is reserved with a DB9 connector, and the equipment is connected to the computer through 232 communication for convenient debugging and maintenance. At the same time, power supply, communication, and fault indicator lights are provided on the panel of the oil well monitoring board, and the main functions can be quickly detected through the indicator lights.

[0046] After completing the installation and debugging of the hardware, the system starts to run. The MCU main control module 1 processes and calculates the data collected by the sensor module 3 and the electrical parameter information such as three-phase current, voltage, active power, reactive power, and active energy collected by the power processing module 2, and then packages and sends it to the ZigBee module 8. The ZigBee module 8 transmits it to the monitoring terminal 9 through wireless transmission, and then confirms whether the software of the monitoring terminal 9 can normally display relevant data such as three-phase voltage, current, active power, reactive power, current change, power factor, forward and reverse active energy, absolute and active energy, total active power, net active energy, temperature, flow rate, pressure, etc.

[0047] An oil well information monitoring system of the present invention is used for monitoring oil well information, can monitor electrical parameters, flow rate, pressure, and temperature, is equipped with four-way analog input for collecting 4~20mA current, two-way 485 input for collecting information transmitted by sensors, and two-way digital input / output for remotely controlling peripheral devices. At the same time, it can monitor whether the on-site circuit breaker is open or closed, and will actively alarm when the circuit breaker is detected to be disconnected. The system sends the collected information to the monitoring terminal through ZigBee wireless communication, completely abandoning the traditional method of using only wired or digital radio to monitor oil wells, and realizing an oil well information monitoring system with comprehensive functions, lightning protection function, and wide voltage input range.

[0048] Due to the remote location and wide distribution of oil wells, the power grid of the power supply system has problems such as low power factor, long lines, and large loads. Through on-site actual research and investigation, it is found that because the wire lines are long and the wires are loose, in windy weather, for the three-phase four-wire electricity, when the wires between the lines and phases are blown by the wind, they are likely to accidentally touch together, causing the 220V voltage to become 380V voltage and damaging the entire oil well information monitoring system. There are two places where the equipment is connected to the three-phase four-wire wire, one is the power supply part, and the other is the three-phase electricity parameter acquisition part. Since the oil well information monitoring equipment is placed outdoors for a long time and the on-site environment is harsh, the monitoring system is often easily struck by lightning, and all ports of the equipment have lightning protection measures. The equipment is placed outdoors in a harsh environment, and the oil field is often in an area with strong winds and sand, and is often exposed to rain and sun. Therefore, the designed equipment shell has rain and wind protection, and the internal monitoring system has dust and corrosion protection capabilities. At present, most of the data transmission methods of on-site equipment in oil fields mostly use wired methods or digital radios, and the on-site wiring is chaotic. This equipment uses a wireless transmission method. The on-site equipment in the oil field is all hung on utility poles or installed on walls, and the equipment lead connections usually use screw crimping methods. In this way, when the screw tightens the lead cold crimping terminal, after a long time, the cold crimping terminal deforms and the stress decreases. After the equipment often vibrates, the screw will become loose, and there is a risk of disconnection of the lead. Therefore, an anti-vibration crimping port is used at the terminal interface. Since most oil wells are in sparsely populated areas, when the main circuit breaker is disconnected, the equipment adds a function to monitor whether the circuit breaker is disconnected. It can not only control the opening and closing of the remote relay, but also monitor whether the circuit breaker is disconnected. When the circuit breaker is disconnected, whether it is manually disconnected or disconnected due to equipment failure, the equipment will report the status of the circuit breaker to the monitoring terminal 9 for alarm.

[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the idea of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil well information monitoring system, characterized in that, Including: MCU main control module, power processing module, sensor module, storage module, power supply module, digital input / output module, analog acquisition module, ZigBee module and monitoring terminal; The MCU main control module is respectively connected to the power processing module, sensor module, storage module, power supply module, digital input / output module, analog acquisition module and ZigBee module, and the ZigBee module is wirelessly connected to the monitoring terminal; the input end of the power processing module is connected to a three-phase four-wire power line; Lightning protection circuits are provided at the input port of the power supply module, the output port of the ZigBee module, the input port of the three-phase four-wire power line and the input port of the sensor module; The monitoring terminal includes a ZigBee coordinator and a main controller, and the ZigBee module communicates wirelessly with the ZigBee coordinator; A switching power supply, a circuit breaker and a surge protector respectively connected to the switching power supply, the switching power supply can withstand an input voltage range of 135V to 418V, and can convert the input AC voltage into 12V, 5V, 3.3V DC voltages required by the system for different parts of the circuit to use; The circuit breaker is an electromagnetic hydraulic circuit breaker; The power processing module is a three-phase multi-functional power metering chip; The analog acquisition module is connected to the oil well dynamometer, and transmits the acquired signal to the MCU main control module after processing; An STM32 chip and two relays, the STM32 chip is connected to the MCU main control module, and drives the relays according to the instructions of the MCU main control module to realize the opening and closing of the oil well field equipment remotely.

2. The oil well information monitoring system according to claim 1, characterized in that, The sensor module includes: a gas sensor, a pressure sensor, a flow sensor and a temperature sensor.

3. The oil well information monitoring system according to claim 2, characterized in that, The MCU main control module, power processing module, storage module, power supply module, digital input / output module, analog acquisition module and ZigBee module are arranged in a cabinet, and the gas sensor, pressure sensor, flow sensor, temperature sensor and three-phase four-wire power line are connected to the terminal block in the cabinet through leads, and the terminal block adopts WAGO spring pressure connection terminals.

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