CN102436237B - Watering heat tracing control method - Google Patents

The invention discloses a watering heat tracing control system and a watering heat tracing control method. The control system comprises a wireless sensor node, a watering heat tracing control node and a watering valve node, wherein the wireless sensor node is arranged among oil collecting valve blanks or on an oil return pipeline of an oil production well; the collected oil return temperature information, watering pressure information and the oil return pressure information are output to the watering heat tracing control node; the watering heat tracing control node is arranged among the oil collecting valve blanks and is used for receiving the information output by the wireless sensor node, and outputting valve opening angle information to the watering valve node which belongs to an oil well with the wireless sensor node; the valve opening angle information is determined through the watering heat tracing control node according to information output by the wireless sensor node and a pre-memorized watering quantity expert database system; and the watering valve node is used for receiving the valve opening angle information output by the watering heat tracing control node so as to carry out watering quantity adjustment. The control system and the control method provided by the invention have the advantages of work efficiency improvement, and energy consumption reduction.

Water mixing heat tracing control method

Technical Field

The invention relates to an automatic control technology, in particular to a water mixing heat tracing control system and a water mixing heat tracing control method.

Background

In the process of crude oil production, in order to ensure that crude oil is normally conveyed to a metering room and a transfer station, a water-blending heat tracing technology is usually adopted, namely high-temperature water from a heating furnace of the transfer station is pumped to the metering room (between oil collecting valve groups) through a water-blending pump and then is respectively conveyed to well heads of various oil wells, so that the high-temperature water is mixed with the crude oil at the well heads to increase the temperature and the flow power of the crude oil.

Although the national regulation specifies the temperature of the hot water coming out of the heating furnace, in practical application, the pressure and heat loss of the hot water flowing through the pipelines are different due to different lengths of the pipelines connected with the heating furnace and different environments, so that the temperature of the mixed water reaching each well is greatly different, and the temperature and the flow force of the crude oil mixed with the hot water are influenced. In order to maintain the water-blending temperature of each oil well within a preset temperature range so as to enable the temperature and the flow force of the crude oil mixed with hot water to reach the optimal state, the water-blending amount needs to be finely controlled according to the oil return temperature, the oil return pressure and the water-blending pressure, and the oil return temperature of the crude oil returning to the metering room is controlled by controlling the water-blending amount, so that the oil return temperature is not too low, a pipeline is not blocked, and a production accident is not caused; the oil return temperature is not too high, the waste of gas for heating, the electric energy of a pressurizing electric pump and the waste of clean water are avoided.

How to control the oil return temperature returning to the metering room within the preset temperature range on the premise of ensuring safe production so as to realize low-temperature crude oil gathering and transportation in the most energy-saving way is the development target of oil fields and the direction of scientific research. At present, the oil return temperature is controlled by water mixing and heat tracing mainly in a manual inspection mode, but the manual inspection mode has the following technical problems:

1. the patrol mode has slow reaction speed and low working efficiency: the inspection process requires a front-line inspector to inspect the site once every two hours, but if the temperature and the pressure of the crude oil in the pipeline are abnormal within two hours, the front-line inspector cannot know the abnormal condition in the first time, and can only wait for the next inspection to find the abnormal condition and process the problem, so that the front-line inspector cannot timely master the dynamic production information of a single oil well (single ring), and hidden danger is brought to production safety.

2. The water blending amount is controlled roughly and the energy consumption is large: the water mixing amount is manually controlled and adjusted by a front-line inspector, and the adjustment period is long, so that the management is extensive, and the energy consumption is increased.

3. In practical application, high-temperature water heated by a transfer station heating furnace is responsible for water mixing and heat tracing of dozens of or even more oil wells, each front line inspector is responsible for a plurality of wells, and the front line inspectors worry that the temperature of the oil wells which are responsible for the front line inspectors is too low and often adjust the water mixing amount, so that after the water mixing amount of a part of the oil wells is adjusted, the high-temperature water flow output by the transfer station heating furnace is increased and the pressure is reduced, and due to the increase of the flow, the water mixing temperature is reduced, the temperature and the pressure of the oil well mouths are influenced, the fluctuation of the temperature and the pressure in pipelines is caused, and more serious results are caused.

4. The automatic transformation difficulty is large: the existing metering room is complex in condition, if the existing metering room is provided with a wired temperature sensor and a pressure transmitter to measure return oil temperature and pressure, due to the fact that wiring construction is needed, shutdown is needed, production is affected, investment is large, and the implementation period is long.

Disclosure of Invention

In view of this, the main objective of the present invention is to provide a water-mixing heat tracing control system, which can improve the working efficiency and reduce the energy consumption.

The invention also aims to provide a water mixing heat tracing control method, which improves the working efficiency and reduces the energy consumption.

In order to achieve the above object, the present invention provides a water mixing heat tracing control system, which comprises: the wireless sensor node is connected with the water-mixing heat tracing control node through a wireless network, the water-mixing heat tracing control node is connected with the water-mixing valve node through a wireless network, wherein,

the wireless sensor node is arranged on an oil return pipeline between the oil collecting valve group or the oil production well, and outputs the collected oil return temperature information, the collected water mixing pressure information and the collected oil return pressure information to the water mixing heat tracing control node;

the water mixing heat tracing control node is arranged among the oil collecting valve groups, the metering room or the oil extraction well mouth, receives information output by the wireless sensor node, and outputs valve opening angle information to the water mixing valve node belonging to the same oil well as the wireless sensor node, wherein the valve opening angle information is determined by the water mixing heat tracing control node according to the information output by the wireless sensor node and a pre-stored water mixing amount expert database;

and the water mixing valve node receives the valve opening angle information output by the water mixing heat tracing control node to adjust the water mixing amount.

The wireless sensor node includes:

the collected oil return temperature information is output to a wireless temperature sensor node of the water mixing heat tracing control node, and the collected water mixing pressure information and oil return pressure information are output to a wireless pressure sensor node of the water mixing heat tracing control node.

The water mixing heat tracing control node is a backbone network gateway.

The watering heat tracing control node comprises: a backbone network gateway, and a central monitoring computer, wherein,

the backbone network gateway is arranged among the oil collecting valve groups, the metering room or the oil extraction well mouth, receives the information output by the wireless sensor nodes and outputs the information to the central monitoring computer; receiving valve opening angle information output by the central monitoring computer, and outputting the information to a water mixing valve node belonging to the same oil well as the wireless sensor node;

and the central monitoring computer receives the information output by the backbone network gateway and outputs valve opening angle information to the backbone network gateway, wherein the valve opening angle information is determined by the central monitoring computer according to the received information and a pre-stored water mixing amount expert database.

The central monitoring computer is arranged in a metering room, a team department, a mine department, a factory department or an oil field headquarter.

The wireless temperature sensor node is installed on the oil return pipeline of single oil well or ring oil well, includes: a temperature sensor, an acquisition processor module, a power supply module, a wireless network communication module and a shell, wherein,

the temperature sensor is connected with the acquisition processor module, the acquisition processor module is connected with the wireless network communication module, the power supply module is respectively connected with the temperature sensor, the acquisition processor module and the wireless network communication module and provides corresponding working power supply, and the temperature sensor, the acquisition processor module, the power supply module and the wireless network communication module are accommodated in the shell.

The wireless pressure sensor node comprises: a pressure sensor, an acquisition processing module, a wireless network communication module, a power supply module and a shell, wherein,

the pressure sensor is connected with the acquisition processor module, the acquisition processor module is connected with the wireless network communication module, the power supply module is respectively connected with the pressure sensor, the acquisition processor module and the wireless network communication module and provides corresponding working power supply, and the pressure sensor, the acquisition processor module, the power supply module and the wireless network communication module are accommodated in the shell.

The watering valve node comprises: a motor, a worm and gear mechanical structure, a valve, a manual control structure, a motor control circuit, a wireless network communication module and a shell, wherein,

the motor is connected with the motor control circuit, the motor control circuit is respectively connected with the wireless network communication module, the worm and gear mechanical structure and the manual control structure, the worm and gear mechanical structure is connected with the valve, and the motor, the worm and gear mechanical structure, the valve, the manual control structure, the motor control circuit and the wireless network communication module are contained in the shell.

The topological structure of the wireless sensor node adopts point-to-point, star, tree or mesh.

The number of the wireless sensor nodes is one or more, and the number of the water-mixing heat tracing control nodes is one.

A water mixing heat tracing control method comprises the following steps:

acquiring oil return temperature, oil return pressure and water mixing pressure parameters;

transmitting the acquired parameter information to a central monitoring computer through a backbone network gateway;

the central monitoring computer acquires the oil well to which the received parameter information belongs, queries a preset water doping amount expert database, adjusts the oil well according to the acquired parameter information of the oil well and the water doping amount expert database, and outputs opening angle information;

and the backbone network gateway receives the opening angle information, sends the opening angle information to the wireless automatic control water mixing valve through a wireless sensor network technology, and the wireless automatic control water mixing valve adjusts the water mixing amount according to the opening angle information.

The oil well is adjusted according to the acquired parameter information of the oil well and the water doping amount expert database, and the outputting of the opening angle information comprises the following steps:

and the central monitoring computer receives the oil return temperature parameter, the water mixing pressure parameter and the oil return pressure parameter value which are collected in real time, and if the oil return temperature parameter is not at the set optimal oil return temperature, the central monitoring computer calculates the valve opening angle value and outputs the opening angle information according to the corresponding relation curve chart of the oil well in the water mixing expert database and the received parameter information.

The oil well is adjusted according to the acquired parameter information of the oil well and the water doping amount expert database, and the outputting of the opening angle information comprises the following steps:

and the central monitoring computer receives the oil return temperature parameter, the water mixing pressure parameter and the oil return pressure parameter value which are acquired in real time, and if the oil return temperature parameter is not at the set optimal oil return temperature, and the difference value between the oil return temperature and the optimal oil return temperature is greater than the set oil return temperature threshold value, the valve opening angle value is calculated and the wireless automatic control water mixing valve is controlled to be adjusted according to the designed adjusting sensitivity according to the corresponding relation curve diagram of the oil well in the water mixing amount expert database and the received parameter information.

It can be seen from the above technical solutions that, a water-blending heat tracing control system and a water-blending heat tracing control method provided by the embodiments of the present invention include: the wireless sensor node is connected with the water-mixing heat tracing control node through a wireless network, and the water-mixing heat tracing control node is connected with the water-mixing valve node through the wireless network, wherein the wireless sensor node is arranged on an oil return pipeline between an oil collecting valve group or an oil production well and outputs collected oil return temperature information, water-mixing pressure information and oil return pressure information to the water-mixing heat tracing control node; the water mixing heat tracing control node is arranged among the oil collecting valve groups, the metering room or the oil extraction well mouth, receives information output by the wireless sensor node, and outputs valve opening angle information to the water mixing valve node belonging to the same oil well as the wireless sensor node, wherein the valve opening angle information is determined by the water mixing heat tracing control node according to the information output by the wireless sensor node and a pre-stored water mixing amount expert database; and the water mixing valve node receives the valve opening angle information output by the water mixing heat tracing control node to adjust the water mixing amount. Therefore, the oil return temperature of the metering room can be automatically controlled within the preset temperature range, so that the low-temperature crude oil gathering and transportation can be realized in the most energy-saving mode, the working efficiency is improved, and the energy consumption can be reduced.

Drawings

FIG. 1 is a schematic structural view of a water-adding heat tracing control system of the present invention.

FIG. 2 is a schematic view of the specific structure of the water-adding heat tracing control system of the present invention.

FIG. 3 is a flow chart of the water-adding heat tracing control method of the present invention.

Fig. 4 is a schematic system structure diagram according to a first embodiment of the present invention.

Fig. 5 is a schematic system structure diagram according to a second embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a system according to a third embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The existing mode of controlling the return oil temperature through water mixing heat tracing is to manually inspect the site according to a preset time period and manually control and adjust the water mixing amount, so that the working efficiency is lower and the energy consumption is higher. Based on a wireless sensor network technical product with low power consumption and high reliability, the invention designs a water-mixing heat tracing control system consisting of wireless temperature sensor nodes, wireless pressure sensor nodes, a wireless automatic control water-mixing valve, a backbone network gateway, a central monitoring computer and monitoring software, connects single wells of an oil field through the internet of things technology, and performs automatic monitoring and remote control in a centralized manner. The device construction is simple and easy, need not to shut down, and construction cycle is short, can master production developments in real time to carry out long-range meticulous control to the water entrainment volume, effectively take precautions against the emergence of accident, improve work efficiency, greatly reduced energy consumption and intensity of labour.

FIG. 1 is a schematic structural view of a water-adding heat tracing control system of the present invention. Referring to fig. 1, the system includes: the wireless sensor node is connected with the water-mixing heat tracing control node through a wireless network, the water-mixing heat tracing control node is connected with the water-mixing valve node through a wireless network, wherein,

the wireless sensor node is arranged on an oil return pipeline between the oil collecting valve group or the oil production well, and outputs the collected oil return temperature information, the collected water mixing pressure information and the collected oil return pressure information to the water mixing heat tracing control node;

the water mixing heat tracing control node is arranged among the oil collecting valve groups, the metering room or the oil extraction well mouth, receives information output by the wireless sensor node, and outputs valve opening angle information to the water mixing valve node belonging to the same oil well as the wireless sensor node, wherein the valve opening angle information is determined by the water mixing heat tracing control node according to the information output by the wireless sensor node and a pre-stored water mixing amount expert database;

and the water mixing valve node receives the valve opening angle information output by the water mixing heat tracing control node to adjust the water mixing amount.

In this embodiment, one oil well corresponds to one wireless sensor node and one water mixing valve node, one or more wireless sensor nodes correspond to one water mixing heat tracing control node, the water mixing heat tracing control node may use the number of oil wells in charge of high-temperature water heated by the relay station heating furnace as a unit, and each water mixing heat tracing control node corresponds to one relay station heating furnace. In practical application, a plurality of wireless sensor nodes can be arranged on one oil well, and a plurality of transit station heating furnaces can be arranged to correspond to one water mixing heat tracing control node.

And carrying wireless sensor node Identification (ID) information when the wireless sensor node outputs oil return temperature information, water mixing pressure information and oil return pressure information.

The water mixing amount expert database stored in the water mixing heat tracing control node comprises a mapping table of wireless sensor node identification and oil well number and parameter models such as optimal oil return temperature, water mixing pipe diameter, length, water mixing pressure, oil return pressure, season and working experience, and each oil well is calculated with an independent corresponding relation curve chart of oil return temperature, water mixing pressure, oil return pressure and water mixing amount according to the parameter models. After receiving oil return temperature information, water mixing pressure information and oil return pressure information output by a wireless sensor node, acquiring oil well number information according to a wireless sensor node identifier, acquiring corresponding current water mixing amount information from a corresponding relation curve chart according to the received oil return temperature information, water mixing pressure information and oil return pressure information, acquiring optimal water mixing amount information corresponding to optimal oil return temperature, determining the water mixing amount to be adjusted according to the optimal water mixing amount information and the current water mixing amount information, and converting the information into angle information, namely valve opening angle information, required to open a valve of a water mixing valve node.

Wherein,

the wireless sensor nodes comprise wireless temperature sensor nodes for outputting collected oil return temperature information to the water mixing heat tracing control nodes and wireless pressure sensor nodes for outputting collected water mixing pressure information and oil return pressure information to the water mixing heat tracing control nodes.

In one embodiment, the water-mixing heat tracing control node is a backbone network gateway.

In another embodiment, the water-mixing heat tracing control node comprises: a backbone network gateway, and a central monitoring computer, wherein,

the backbone network gateway is arranged among the oil collecting valve groups, the metering room or the oil extraction well mouth, receives the information output by the wireless sensor nodes and outputs the information to the central monitoring computer; receiving valve opening angle information output by the central monitoring computer, and outputting the information to a water mixing valve node belonging to the same oil well as the wireless sensor node;

and the central monitoring computer receives the information output by the backbone network gateway and outputs valve opening angle information to the backbone network gateway, wherein the valve opening angle information is determined by the central monitoring computer according to the received information and a pre-stored water mixing amount expert database.

FIG. 2 is a schematic view of the specific structure of the water-adding heat tracing control system of the present invention. Referring to fig. 2, the system includes: a wireless temperature sensor node, a wireless pressure sensor node, a wireless automatic control water mixing valve, a backbone network gateway and a central monitoring computer, wherein,

the wireless temperature sensor node consists of a temperature sensor, an acquisition processor module, a power supply module, a wireless network communication module and a shell, the wireless temperature sensor node is arranged on an oil return pipeline of a single oil well or a ring oil well, the temperature sensor is connected with the acquisition processor module, the acquisition processor module is connected with the wireless network communication module, the power supply module is respectively connected with the temperature sensor, the acquisition processor module and the wireless network communication module and provides corresponding working power supply, the temperature sensor, the acquisition processor module, the power supply module and the wireless network communication module are accommodated in the shell, the temperature sensor monitors and acquires oil return temperature according to a preset acquisition period, the acquisition processor module samples and quantifies the acquired oil return temperature, sending the monitored oil return temperature value to a backbone network gateway by a wireless network communication module and adopting a low-power consumption wireless sensor network technology;

the wireless pressure sensor node is composed of a pressure sensor, an acquisition processing module, a wireless network communication module, a power supply module and a shell, the wireless pressure sensor node for acquiring water mixing pressure information and oil return pressure information is respectively arranged on a water mixing pipeline and an oil return pipeline, the pressure sensor monitors and acquires the water mixing pressure and the oil return pressure information, the acquisition processor module samples and quantizes the acquired water mixing pressure and oil return pressure information, and the wireless network communication module transmits the monitored and acquired water mixing pressure value and oil return pressure value to a backbone network gateway by adopting a low-power wireless sensor network technology;

the wireless automatic control water mixing valve consists of a motor, a worm and gear mechanical structure, a valve, a manual control structure, a motor control circuit, a wireless network communication module and a shell; the motor is connected with the motor control circuit, the motor control circuit is respectively connected with the wireless network communication module, the worm gear mechanical structure and the manual control structure, the worm gear mechanical structure is connected with the valve, the motor, the worm gear mechanical structure, the valve, the manual control structure, the motor control circuit and the wireless network communication module are accommodated in the shell, the wireless network communication module receives valve opening angle information output by the backbone network gateway and outputs the valve opening angle information to the motor control circuit, and the motor control circuit controls the worm gear mechanical structure and the manual control structure according to the valve opening angle information, so that the opening angle of the valve is controlled, and the control of the water mixing amount is realized.

And the backbone network gateway is used for sending the valve opening angle value to the wireless automatic control valve through the wireless sensor network technology, controlling the valve of the wireless automatic control water mixing valve to open according to the instruction and controlling the water mixing amount.

In the invention, a backbone network gateway is deployed in a duty room between oil collecting valve groups (metering rooms), a wireless temperature sensor node, a wireless pressure sensor node and a wireless automatic control water mixing valve are connected to the backbone network gateway through a low-power consumption sensor network, and the backbone network gateway realizes long-distance whole oil field coverage through backbone networks such as General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), private network and the like, and collects received data (temperature and pressure information) to a central monitoring computer.

Each backbone gateway may control wireless sensor nodes of multiple wells and assign corresponding wireless sensor node identifications, e.g., control multiple wireless temperature sensor nodes and wireless pressure sensor nodes.

The central monitoring computer can be arranged in a team department duty room among the managed oil collecting valve groups (metering rooms), carries out field monitoring, display recording, control and alarm on the data of the oil production well, and is provided with monitoring software;

the monitoring software has a setting function, a display function, a control function, a water entrainment expert system, an alarm function and a reporting function, wherein,

the setting function includes: user authority setting, backbone network gateway parameter setting, sensor node parameter setting, alarm setting and the like.

The display functions include: and displaying the oil well panoramic map, the configuration map, the list numerical values and the trend curve.

The control functions include: automatic control of the water mixing valve and manual remote control.

And the water blending amount expert system is used for adaptively learning, adjusting and controlling the water blending amount according to the characteristics of each well.

The alarm function includes: and sound and light alarm is carried out on the low limit and the over limit.

The reporting functions include: and outputting a daily, weekly, monthly and annual statistical report.

FIG. 3 is a flow chart of the water-adding heat tracing control method of the present invention. Referring to fig. 3, the process includes:

301, acquiring oil return temperature, oil return pressure and water mixing pressure parameters;

in the step, the wireless temperature sensor node acquires an oil return temperature parameter, and the wireless pressure sensor node acquires a water mixing pressure parameter and an oil return pressure parameter.

Step 302, transmitting the acquired parameter information to a central monitoring computer through a backbone network gateway;

in the step, the wireless temperature sensor node and the wireless pressure sensor node respectively output the acquired oil return temperature parameter, water mixing pressure parameter and oil return pressure parameter to a backbone network gateway through a wireless sensor network technology, and the backbone network gateway transmits the received temperature and pressure parameters to a central monitoring computer through a backbone network.

In practical application, when the sensor node outputs parameter information, the sensor node carries its own sensor node identifier, for example, the oil return temperature parameter carries a wireless temperature sensor node identifier, and the water mixing pressure parameter carries a wireless pressure sensor node identifier. The wireless temperature sensor node identification and the wireless pressure sensor node identification have a mapping relation with the oil well to which the wireless temperature sensor node identification and the wireless pressure sensor node identification belong. For example, the wireless temperature sensor node identified as 11, the wireless temperature sensor node identified as 12 and the wireless pressure sensor node identified as 13 correspond to a # 10 oil well; and the wireless temperature sensor node identified as 21 and the wireless pressure sensor node identified as 22 correspond to # 20 oil wells.

303, acquiring the oil well to which the received parameter information belongs by the central monitoring computer, inquiring a preset water doping amount expert database, adjusting the oil well according to the acquired parameter information of the oil well and the water doping amount expert database, and outputting opening angle information;

in the step, monitoring software is installed on a central monitoring computer, the monitoring software is designed with a water mixing amount expert database, and each well is calculated with an independent corresponding relation curve chart of oil return temperature, water mixing pressure and water mixing amount according to set optimal oil return temperature, water mixing pipe diameter, length, season, working experience and other parameter models.

When the central monitoring computer receives the oil return temperature parameter, the water mixing pressure parameter and the oil return pressure parameter value which are collected in real time, if the oil return temperature parameter is not in the set optimal state (optimal oil return temperature), the valve opening angle value (water mixing amount) is calculated according to the corresponding relation curve chart of the oil well in the water mixing amount expert database and the received parameter information. And if the oil return temperature parameter is in the set optimal state (optimal oil return temperature), the wireless automatic control water mixing valve maintains the current state.

Meanwhile, in the whole control process, the water mixing amount expert system can learn and collect the optimal corresponding relation among the oil return temperature, the water mixing pressure and the water mixing amount of each well in a circulating mode, and a more detailed parameter model and a corresponding relation curve chart are established through long-time dynamic adjustment and accumulation.

In practical application, in order to avoid frequent and repeated adjustment of the whole control system, the water doping expert system is designed with proper adjustment sensitivity and is provided with an oil return temperature threshold, when the difference between the oil return temperature and the optimal oil return temperature is not greater than the set oil return temperature threshold, the wireless automatic control water doping valve is controlled not to be adjusted, and when the difference between the oil return temperature and the optimal oil return temperature is greater than the set oil return temperature threshold, the valve opening angle value is calculated and the wireless automatic control water doping valve is controlled to be adjusted according to the designed adjustment sensitivity according to the corresponding relation curve diagram of the oil well in the water doping expert database and the received parameter information.

The central monitoring computer can also output the opening angle information output to each backbone network gateway to the transfer station heating furnace, and the transfer station heating furnace adjusts the total supplied water mixing amount according to the received information.

And 304, receiving the opening angle information by the backbone network gateway, sending the opening angle information to the wireless automatic control watering valve through the wireless sensor network technology, and adjusting the watering amount by the wireless automatic control watering valve according to the opening angle information.

In this step, after the wireless automatic control watering valve adjusts the watering amount according to the opening angle information, the wireless temperature sensor node continues to acquire the oil return temperature parameter, and the wireless pressure sensor node acquires the watering pressure parameter and the oil return pressure parameter, that is, the step 301 is executed again until the central monitoring computer determines that the oil return temperature reaches the set optimal state.

The invention is applied to wireless monitoring among oil collecting valve groups, unattended operation among oil collecting valve groups and unattended operation of a wellhead as an example, and three specific embodiments are given, and detailed description is given.

The first embodiment is as follows: wireless monitoring between oil collection valve groups

Fig. 4 is a schematic system structure diagram according to a first embodiment of the present invention. Referring to fig. 4, the system is composed of wireless temperature sensor nodes, wireless pressure sensor nodes, a backbone network gateway and a central monitoring computer.

In the embodiment, a wireless automatic control water mixing valve is not used, but a manual control water mixing valve installed on the existing pipeline is used.

The wireless temperature sensor nodes and the wireless pressure sensor nodes are arranged between the oil collecting valve groups and are connected to a backbone network through an 802.15.4 network, a backbone network gateway is arranged in an on-duty room of a metering room, the oil return temperature and the water mixing pressure are measured in the oil collecting valve group, the backbone network gateway is collected to a central monitoring computer through a GPRS network, when the oil return temperature is not in the set optimal oil return temperature range (the optimal oil return temperature is usually 35-38 ℃), the central monitoring computer informs an on-duty person through monitoring software in the alarm modes of short messages, sound, light and the like, the on-duty person manually adjusts the opening angle of the water mixing valve according to experience, and the water mixing amount is manually controlled.

In this embodiment, the wireless temperature sensor nodes and the wireless pressure sensor nodes may use mature products supporting the wireless sensor network technology to form topology structures such as point-to-point, star, tree, mesh, and the like according to the coverage requirement.

The backbone network gateway accesses the Wireless sensor network to a backbone network, which includes existing public or private networks such as a Global System for Mobile communications (GSM), CDMA, Wireless Fidelity (WIFI), World Interoperability for Microwave Access (WIMA), a Multi-Carrier Wireless Information Local Loop (mcwide), and an optical fiber.

The central monitoring computer can be arranged in monitoring centers at all levels such as a metering room, a team department, a mine department, a factory department, an oil field headquarter and the like, can also be simultaneously arranged and can be managed according to authority in grades.

The wireless temperature sensor node, the wireless pressure sensor node, the backbone network gateway and other oil extraction field installation equipment are designed according to the safety requirements and pass safety explosion-proof certification according to related regulations in order to avoid accidents such as fire disasters.

Example two: unattended operation between oil collecting valve sets

Fig. 5 is a schematic system structure diagram according to a second embodiment of the present invention. Referring to fig. 5, the whole system of this embodiment is composed of a wireless temperature sensor node, a wireless pressure sensor node, a wireless automatic control water mixing valve, a backbone network gateway, and a central monitoring computer equipped with monitoring software.

The wireless temperature sensor node, the wireless pressure sensor node, the wireless automatic control water mixing valve and the backbone network gateway are arranged between oil collecting valve banks or a metering room, the oil return temperature, the oil return pressure and the water mixing pressure are measured in the oil collecting valve banks and collected to the central control computer through the backbone network gateway, when the oil return temperature is not in the set optimal oil return temperature range (the optimal oil return temperature is usually 35-38 ℃), the central monitoring computer calculates the valve opening angle value (water mixing amount) according to the corresponding relation and sends the valve opening angle value information to the backbone network gateway, and the backbone network gateway sends the opening angle value information to the wireless automatic control water mixing valve through the wireless sensor network technology and adjusts the water mixing amount until the oil return temperature reaches the set optimal state. Of course, the operator on duty can also remotely control and adjust the water mixing amount according to the oil return temperature without using the automatic control and adjustment function.

In this embodiment, the wireless temperature sensor nodes and the wireless pressure sensor nodes may use mature products supporting the wireless sensor network technology to form topology structures such as point-to-point, star, tree, mesh, and the like according to the coverage requirement.

The backbone network gateway accesses the wireless sensor network to a backbone network, which includes existing public networks or private networks such as GSM, CDMA, WIFI, WIMA, MCWILL, local area networks, optical fibers and the like.

The central monitoring computer can be arranged in monitoring centers of all levels such as an oil collecting valve group (metering room), a team department, a mine department, a factory department, an oil field headquarters and the like, can also be simultaneously arranged and can be managed according to authority in grades.

The wireless automatic control water mixing valve can be additionally provided with an electric actuator on the existing valve, and receives a control command through a wireless sensor network module to adjust the opening angle of the valve. In practical application, the wireless automatic control watering valve can integrate the electric actuator, the wireless sensor network module, the control circuit and the valve.

The wireless temperature sensor node, the wireless pressure sensor node, the wireless automatic control water mixing valve, the backbone network gateway and other oil extraction field installation equipment are designed according to the safety requirements and pass the safety explosion-proof certification according to related regulations in order to avoid accidents such as fire disasters.

Example three: well head unmanned on duty

Fig. 6 is a schematic structural diagram of a system according to a third embodiment of the present invention. Referring to fig. 6, the whole system of this embodiment is composed of a wireless temperature sensor node, a wireless pressure sensor node, a wireless automatic control water mixing valve, a backbone network gateway, a central monitoring computer, and monitoring software (monitoring software).

The wireless temperature sensor node, the wireless pressure sensor node, the wireless automatic control water mixing valve and the backbone network gateway are installed at an oil extraction well head, the oil return temperature, the oil return pressure and the water mixing pressure are measured at the well head and are collected to the central control computer through the backbone network gateway, when the oil return temperature is not within the set optimal oil return temperature range (the optimal oil return temperature is usually 35-38 ℃), the central control computer calculates the valve opening angle value (water mixing amount) according to the corresponding relation and sends the valve opening angle value to the backbone network gateway, the backbone network gateway sends the opening angle value information to the wireless automatic control water mixing valve through the wireless sensor network technology, and the wireless automatic control water mixing valve adjusts the water mixing amount according to the opening angle value information until the oil return temperature reaches the set optimal state. Of course, the operator on duty can also remotely control and adjust the water mixing amount according to the oil return temperature without using the automatic control and adjustment function. In some implementation sites, the corresponding relation between the return oil temperature and the water doping amount can be placed in a backbone network gateway or any node, and the water doping amount is adjusted on site without being transmitted back to a central monitoring computer.

In this embodiment, the wireless temperature sensor nodes and the wireless pressure sensor nodes may use mature products supporting the wireless sensor network technology to form topology structures such as point-to-point, star, tree, mesh, and the like according to the coverage requirement. In some cases, the wireless temperature sensor node and the wireless pressure sensor node can be integrated together, share the shell, the processor and the wireless communication module, and measure the temperature and the pressure simultaneously.

The backbone network gateway accesses the wireless sensor network to a backbone network, which includes existing public networks or private networks such as GSM, CDMA, WIFI, WIMA, MCWILL, local area networks, optical fibers and the like.

The central monitoring computer can be arranged in monitoring centers at all levels such as a metering room, a team department, a mine department, a factory department, an oil field headquarter and the like, can also be simultaneously arranged and can be managed according to authority in grades.

The wireless automatic control water mixing valve can be additionally provided with an electric actuator on the existing valve, and receives a control command through a wireless sensor network module to adjust the opening angle of the valve. In practical application, the wireless automatic control watering valve can integrate the electric actuator, the wireless sensor network module, the control circuit and the valve.

The wireless temperature sensor node, the wireless pressure sensor node, the wireless automatic control water mixing valve, the backbone network gateway and other oil extraction field installation equipment are designed according to the safety requirements and pass the safety explosion-proof certification according to related regulations in order to avoid accidents such as fire disasters.

In the embodiment, the field installation equipment is directly installed in the open air at the wellhead, so that the oil return temperature and the water doping amount are more direct, higher requirements are provided for the field working capacity of the equipment, in order to adapt to the installation mode of the wellhead in the embodiment, the wide temperature working range (-40 to +85 ℃), the protection level above IP65 and the requirements of lightning protection, theft prevention and other field severe environments are considered in the field equipment design process.

According to the water-blending heat tracing control system, the wireless sensor node is arranged on the corresponding oil return pipeline of the oil well, the pipeline oil return temperature information, the water-blending pressure information and the oil return pressure information are collected and output to the water-blending heat tracing control node through the wireless network, the water-blending heat tracing control node obtains the water-blending difference value of the water-blending quantity corresponding to the optimal oil return temperature and the water-blending quantity corresponding to the current oil return temperature according to the received information and a pre-stored water-blending quantity expert database, the water-blending difference value is converted into the valve opening angle information and is output to the water-blending valve node, so that the valve opening angle of the water-blending valve node is adjusted, the oil return temperature returning to the metering room is controlled within the preset temperature range, and the low-temperature crude oil gathering and transportation is realized in the most energy-saving mode. Therefore, in the oil field water-mixing heat-tracing oil production process, the wireless sensor node can acquire temperature and pressure information in real time, manual inspection is not needed, the dynamic production information of a single oil well can be mastered in time, the reaction speed is high, the working efficiency is high, and the extensive management mode adjusted by manual inspection is upgraded to a fine closed-loop automatic control mode, so that safe and reliable low-temperature gathering and transportation are realized, the loss of heat energy is greatly reduced, the energy consumption of water, electricity and gas is reduced, and energy conservation and emission reduction are realized; furthermore, the opening angle state of the water mixing valve can be automatically controlled and adjusted according to the oil return temperature, the water mixing pressure and the oil return pressure difference, the water mixing amount can be adjusted in real time, the oil return temperature is controlled to be in the optimal state by controlling the water mixing amount, the management is fine, and the energy consumption is effectively reduced; moreover, the water-mixing heat tracing control node performs coordinated and unified control on each oil well, so that the temperature and pressure fluctuation of the oil well is small, the crude oil yield and the informatization and automation level of the oil field are improved, and the labor intensity of oil extraction work is greatly reduced; in addition, wireless control is adopted, so that production is not influenced, investment is low, and implementation period is short.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.