Control system suitable for unconventional oil and gas discharge and production

Abstract

The utility model relates to the technical field of oil and gas exploitation, in particular to a control system suitable for unconventional oil and gas discharge and exploitation. The control system comprises an electric actuator, a frequency conversion cabinet, an electromagnetic flowmeter and an underground pressure gauge; the electric actuator is provided with a main controller, the electric actuator is electrically connected with a valve of a gas pipeline, and the main controller is used for controlling the opening degree of the valve through the electric actuator; a fluid metering unit is integrated in the electric actuator and used for collecting gas data of gas passing through the valve. An electromagnetic flowmeter is electrically connected to the exterior of the electric actuator and is used for collecting the water flow of water passing through the waterway pipeline; the exterior of the electric actuator is electrically connected with an underground pressure gauge, and the underground pressure gauge is used for collecting underground pressure data; and a frequency conversion cabinet is electrically connected outside the electric actuator and is used for changing frequency according to an instruction of the main controller. According to the scheme provided by the utility model, unconventional oil and gas extraction can be stably carried out.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas extraction technology, and in particular to a control system suitable for unconventional oil and gas drainage. Background Technology

[0002] Currently, control systems used for unconventional oil and gas drainage are generally centered around a frequency converter cabinet, connecting downhole pressure gauges, casing pressure gauges, electromagnetic flow meters, gas flow meters, electric actuators, and frequency converters to the cabinet for data acquisition and equipment control. This approach has two major drawbacks: first, the frequency converter is a significant source of interference, potentially disrupting communication between devices; second, from a cost perspective, an additional main controller is required for data processing. Utility Model Content

[0003] This utility model provides a control system suitable for unconventional oil and gas drainage, which can stably perform unconventional oil and gas drainage.

[0004] This utility model provides a control system suitable for unconventional oil and gas drainage, including an electric actuator, a frequency converter, an electromagnetic flowmeter, and a downhole pressure gauge;

[0005] The electric actuator is equipped with a main controller, and the electric actuator is electrically connected to a valve of a gas pipeline. The main controller is used to control the opening degree of the valve through the electric actuator.

[0006] The electric actuator integrates a fluid metering unit, which is used to collect gas data of the gas passing through the valve and transmit the collected gas data to the main controller to calculate the gas flow rate.

[0007] The electric actuator is externally connected to an electromagnetic flow meter, which is used to collect the water flow rate through the water pipe and transmit the collected water flow rate to the main controller.

[0008] The electric actuator is externally connected to a downhole pressure gauge, which is used to collect downhole pressure data and transmit the collected pressure data to the main controller.

[0009] The electric actuator is externally connected to a frequency converter cabinet, which is used to change the frequency according to the instructions of the main controller.

[0010] In one possible design, the fluid metering unit includes a manometer, a thermometer, and a differential pressure gauge.

[0011] In one possible design, the electric actuator is externally connected to the frequency converter cabinet, the electromagnetic flowmeter, and the downhole pressure gauge via a 485 bus.

[0012] In one possible design, the electric actuator is externally connected to the frequency converter cabinet, the electromagnetic flowmeter, and the downhole pressure gauge via a 4-20mA current signal.

[0013] In one possible design, the frequency converter cabinet is used to collect its operating data in real time for safety monitoring of the control system.

[0014] In one possible design, the operating data includes output frequency, output voltage, output current, output torque, output power, inverter operating status, and inverter fault codes.

[0015] In one possible design, the frequency converter cabinet is used to control the rotational speed of a motor connected to it by changing the frequency, and the motor is used to control the oil and gas extraction efficiency.

[0016] Compared with the prior art, the present invention has at least the following advantages:

[0017] In this embodiment, the fluid metering unit, which is easily interfered with by the frequency converter cabinet, is integrated into an electric actuator equipped with a main controller. This arrangement keeps the fluid metering unit away from the frequency converter cabinet, thereby ensuring the stable operation of the various sensors within the fluid metering unit. The electric actuator integrates a main controller, which is electrically connected to its external frequency converter cabinet, electromagnetic flowmeter, and downhole pressure gauge. The main controller receives the second flow rate and downhole pressure data collected by the electromagnetic flowmeter and generates frequency conversion commands based on the received data to control the frequency converter cabinet to change its frequency, thus completing the control of unconventional oil and gas drainage. The entire system does not require an additional main controller, saving costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a control system for unconventional oil and gas drainage provided by an embodiment of this utility model.

[0020] In the picture:

[0021] 1-Electric actuator;

[0022] 2-Variable frequency drive cabinet;

[0023] 3-Electromagnetic flowmeter;

[0024] 4-Downhole pressure gauge;

[0025] 5-Valve. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this specification, it should be understood that the directional terms such as "upper" and "lower" used in the description of the embodiments of this utility model are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this utility model. Furthermore, in the context, it should also be understood that when it is mentioned that one element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0029] like Figure 1 As shown, this utility model embodiment provides a control system suitable for unconventional oil and gas drainage, including an electric actuator 1, a frequency converter 2, an electromagnetic flowmeter 3, and a downhole pressure gauge 4;

[0030] The electric actuator 1 is equipped with a main controller. The electric actuator 1 is electrically connected to the valve 5, which is connected to a gas pipeline. The main controller is used to control the opening degree of the valve 5 through the electric actuator 1.

[0031] The electric actuator 1 has an integrated fluid metering unit, which is used to collect gas data of the gas passing through valve 5 and transmit the collected gas data to the main controller to calculate the gas flow rate.

[0032] The electric actuator 1 is externally connected to an electromagnetic flow meter 3, which is used to collect the water flow rate through the water pipe and transmit the collected water flow rate to the main controller.

[0033] The electric actuator 1 is externally connected to a downhole pressure gauge 4, which is used to collect downhole pressure data and transmit the collected pressure data to the main controller.

[0034] The electric actuator 1 is externally connected to a frequency converter cabinet 2, which is used to change the frequency according to the instructions of the main controller.

[0035] In this embodiment, the fluid metering unit, which is easily interfered with by the frequency converter cabinet 2, is integrated into the electric actuator 1, which is equipped with a main controller. This arrangement keeps the fluid metering unit away from the frequency converter cabinet 2, thereby ensuring the stable operation of the various sensors within the fluid metering unit. The electric actuator 1 integrates a main controller, which is electrically connected to the external frequency converter cabinet 2, electromagnetic flowmeter 3, and downhole pressure gauge 4. The main controller receives the second flow rate and downhole pressure collected by the electromagnetic flowmeter 3, and generates frequency conversion commands based on the received data to control the frequency converter cabinet 2 to change its frequency, thus completing the control of unconventional oil and gas drainage. The entire system does not require an additional main controller, saving costs.

[0036] In this embodiment, the downhole pressure gauge 4 collects the downhole pressure, directly reflecting the current liquid pressure value, which can also be converted into the corresponding liquid column height. The main controller in the electric actuator 1 controls the frequency output of the frequency converter 2 according to the drainage algorithm. The electromagnetic flowmeter 3 can monitor the current flow rate of the discharged liquid, thereby monitoring the pump's drainage capacity.

[0037] In some embodiments of this utility model, the fluid metering unit includes a manometer, a thermometer, and a differential pressure gauge.

[0038] In this embodiment, the manometer, thermometer, and differential pressure gauge collect the casing pressure, gas temperature, and pressure difference between the two measuring points, respectively. The main controller monitors the gas flow rate based on the collected data and through a certain algorithm.

[0039] In some embodiments of this utility model, the electric actuator 1 is electrically connected to the frequency converter cabinet 2, the electromagnetic flowmeter 3, and the downhole pressure gauge 4 via a 485 bus.

[0040] In some embodiments of this utility model, the electric actuator 1 is electrically connected to the frequency converter cabinet 2, the electromagnetic flowmeter 3, and the downhole pressure gauge 4 via a 4-20mA current signal.

[0041] In some embodiments of this utility model, the frequency converter cabinet 2 is used to collect its operating data in real time for safety monitoring of the control system.

[0042] In some embodiments of this utility model, the operating data includes output frequency, output voltage, output current, output torque, output power, inverter operating status, and inverter fault codes.

[0043] In this embodiment, the transportation data is used to monitor the mining operation. When the monitored data exceeds the set protection parameters, the system will issue an alarm or shut down. The maximum protection equipment operates under normal operating conditions.

[0044] In some embodiments of this utility model, the frequency converter cabinet 2 is used to control the speed of the motor connected to it by changing the frequency, and the motor is used to control the oil and gas extraction efficiency.

[0045] In this embodiment, the frequency converter 2 can control the speed of the motor by changing its frequency. The motor is used to provide power for oil and gas drainage and extraction, thereby achieving efficiency control of oil and gas drainage and extraction.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A control system suitable for unconventional oil and gas production, characterized in that, It includes an electric actuator (1), a frequency converter (2), an electromagnetic flowmeter (3), and a downhole pressure gauge (4); The electric actuator (1) is equipped with a main controller, and the electric actuator (1) is electrically connected to a valve (5) of a gas pipeline. The main controller is used to control the opening degree of the valve (5) through the electric actuator (1). The electric actuator (1) has a fluid metering unit integrated inside. The fluid metering unit is used to collect gas data of the gas passing through the valve (5) and transmit the collected gas data to the main controller to calculate the gas flow rate. The electric actuator (1) is externally electrically connected to an electromagnetic flow meter (3), which is used to collect the water flow rate of water passing through the water pipe and transmit the collected water flow rate to the main controller. The electric actuator (1) is externally connected to a downhole pressure gauge (4), which is used to collect downhole pressure data and transmit the collected pressure data to the main controller. The electric actuator (1) is externally electrically connected to a frequency converter cabinet (2), which is used to change the frequency according to the instructions of the main controller.

2. The control system of claim 1, wherein, The fluid metering unit includes a manometer, a thermometer, and a differential pressure gauge.

3. The control system of claim 1, wherein, The electric actuator (1) is electrically connected to the frequency converter (2), the electromagnetic flowmeter (3) and the downhole pressure gauge (4) via a 485 bus.

4. The control system of claim 1, wherein, The electric actuator (1) is electrically connected to the frequency converter (2), the electromagnetic flowmeter (3), and the downhole pressure gauge (4) via a 4-20mA current signal.

5. The control system of claim 1, wherein, The frequency converter cabinet (2) is used to collect its operating data in real time for safety monitoring of the control system.

6. The control system according to claim 5, characterized in that, The operating data includes output frequency, output voltage, output current, output torque, output power, inverter operating status, and inverter fault codes.

7. The control system of claim 1, wherein, The frequency converter cabinet (2) is used to control the speed of the motor connected to it by changing the frequency, and the motor is used to control the oil and gas drainage efficiency.

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