Wellhead intelligent heating device

Abstract

The utility model relates to the technical field of oil production engineering, in particular to a wellhead intelligent heating device which comprises an oil pumping unit, a wellhead, an oil conveying pipeline, a parallel connection valve, a series connection valve and a heating device, the heating device is installed on the oil conveying pipeline, and the series connection valve is installed between the heating device and the oil conveying pipeline. And the parallel valve is connected with the heating device in parallel. The heating power and the output temperature are adjustable, the requirement for output of oil products with different properties is met, the over-temperature protection function is achieved, dry burning accidents of equipment when an oil well has no output are avoided, fault information can be displayed on a touch screen after the equipment breaks down, an alarm signal is sent out, no open fire exists when the device runs, and a heating pipeline does not heat, so that the device is safe and reliable. The heating body is an oil conveying pipeline below the heat preservation and insulation layer, so that the heating device is safe, reliable and high in heat efficiency, the requirement for increasing the output liquid inlet temperature in crude oil extraction of an oil extraction plant is met, and a new solution is provided for crude oil production.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production engineering, in particular to a wellhead intelligent heating device. Background Art

[0002] At present, due to the low temperature and high viscosity of crude oil, the back pressure of oil well output fluid is too high during pipeline transportation, and some even cannot be transported. In order to solve this problem, users have to use the method of mixing diluted oil and hot water to overcome the difficulties. However, doing so will increase the cost of crude oil extraction and increase the water content in the output fluid, which will increase the workload of subsequent dehydration work. Therefore, it is necessary to provide an economical and easy-to-manage solution. Utility Model Content

[0003] The purpose of the utility model is to provide a wellhead intelligent heating device to solve the problem of high pipe transport back pressure, make oil production safe and efficient, and reduce the cost of crude oil extraction.

[0004] The utility model adopts the following technical scheme: a wellhead intelligent heating device, comprising an oil pumping unit, a wellhead, an oil pipeline, a parallel valve, a series valve and a heating device, wherein the heating device is installed on the oil pipeline, the series valve is installed between the heating device and the oil pipeline, and the parallel valve is connected in parallel with the heating device;

[0005] The heating device includes an oil inlet interface, a heating pipeline, a thermal insulation layer, an electromagnetic coil, a temperature transmitter, an oil outlet interface, a temperature controller, a PLC control system and a frequency conversion system. The lower part of the heating pipeline is fixedly connected to the oil inlet interface, the upper part of the heating pipeline is fixedly connected to the oil outlet interface, the electromagnetic coil is wound on the outer surface of the heating pipeline, the electromagnetic coil is connected to the output port of the frequency conversion system, and the sensor of the temperature transmitter is tightly attached to the heating pipeline.

[0006] Preferably, the oil inlet and outlet interfaces are fixedly connected to the series valves, respectively, and the series valves and the parallel valves are installed in parallel. Here, by closing the series valves and opening the parallel valves, the heating device can be disassembled for maintenance without interrupting the normal production of the oil well, thereby improving maintenance efficiency and operational flexibility.

[0007] Preferably, the thermal insulation layer is wrapped around the outer surface of the heating pipeline, and the thermal insulation layer is located between the electromagnetic coil and the heating pipeline. Here, heat loss is effectively prevented, ensuring that the generated heat is mainly transferred to the liquid in the pipeline, improving thermal efficiency, reducing energy consumption, saving electricity required during the heating process, making the equipment more energy-saving and environmentally friendly, and reducing operating costs.

[0008] Preferably, the temperature signal sensed by the temperature transmitter is transmitted to the temperature controller, and the PLC control system receives information from the temperature controller and the frequency converter. Here, the temperature of the heating pipeline can be monitored and accurately controlled in real time to ensure that the crude oil is heated to the required temperature, effectively reduce the viscosity of the crude oil, improve the transportation efficiency, ensure that the power supply is cut off in time in the case of over-temperature or abnormal conditions, stop the equipment operation and send an alarm signal, avoid equipment damage and potential safety hazards, and improve the safety of the system.

[0009] Preferably, the frequency conversion system converts 380V 50Hz AC power into 2000Hz medium frequency power, and the electromagnetic coil works on the heating pipeline. Here, the high-frequency electromagnetic field is used to work on the heating pipeline, so that eddy currents are generated inside the pipeline to generate heat, thereby improving the heating efficiency. The medium-frequency electric heating technology is more stable and reliable than the traditional heating method, and can provide continuous and uniform heating effects, ensuring that the crude oil maintains a constant temperature during transportation, which is conducive to a smooth and efficient production process.

[0010] Compared with the prior art, the advantages and positive effects of the utility model are:

[0011] 1. The heating power and the external temperature are adjustable to meet the needs of external transportation of oils with different properties.

[0012] 2. It has over-temperature protection function to prevent dry burning accidents of equipment when the oil well has no production.

[0013] 3. When the equipment fails, the fault information will be displayed on the touch screen and an alarm signal will be issued.

[0014] 4. There is no open flame when the device is running, the heating pipeline itself does not generate heat, and the heating element is the oil pipeline under the thermal insulation layer. Therefore, it is safe, reliable and has high thermal efficiency.

[0015] The use of the utility model meets the need of increasing the inlet temperature of the output liquid during crude oil production in the oil production plant, and provides a new solution for crude oil production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the installation of a wellhead intelligent heating device is proposed for the utility model;

[0017] Figure 2 The utility model provides an electrical principle diagram of a wellhead intelligent heating device.

[0018] Legend:

[0019] 1. Pumping unit; 2. Wellhead; 3. Oil pipeline; 4. Parallel valve; 5. Series valve; 6. Heating device; 61. Oil inlet interface; 62. Heating pipeline; 63. Thermal insulation layer; 64. Electromagnetic coil; 65. Temperature transmitter; 66. Oil outlet interface; 67. Temperature controller; 68. PLC control system; 69. Frequency conversion system. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0022] Example

[0023] See also Figure 1-2The utility model provides a technical solution: a wellhead intelligent heating device, including an oil pump 1, a wellhead 2, an oil pipeline 3, a parallel valve 4, a series valve 5 and a heating device 6, the heating device 6 is installed on the oil pipeline 3, the series valve 5 is installed between the heating device 6 and the oil pipeline 3, the parallel valve 4 and the heating device 6 are connected in parallel, the heating device 6 includes an oil inlet interface 61, a heating pipeline 62, a thermal insulation layer 63, an electromagnetic coil 64, a temperature transmitter 65, an oil outlet interface 66, a temperature controller 67, a PLC control system 68 and a frequency conversion system 69, and the lower part of the heating pipeline 62 is fixedly connected to the oil inlet interface 61 The upper part of the heating pipeline 62 is fixedly connected to the oil outlet interface 66, the electromagnetic coil 64 is wound around the outer surface of the heating pipeline 62, the thermal insulation layer 63 is wrapped around the outer surface of the heating pipeline 62, and the thermal insulation layer 63 is located between the electromagnetic coil 64 and the heating pipeline 62, which effectively prevents heat loss and ensures that the generated heat is mainly transferred to the liquid in the pipeline, thereby improving thermal efficiency and reducing energy consumption, saving electricity required in the heating process, making the equipment more energy-saving and environmentally friendly, and reducing operating costs. The electromagnetic coil 64 is connected to the output port of the frequency conversion system 69, and the sensor of the temperature transmitter 65 is closely attached to the heating pipeline. 62, the temperature signal sensed by the temperature transmitter 65 is transmitted to the temperature controller, and the PLC control system 68 receives the information of the temperature controller 67 and the frequency converter, which can monitor and accurately control the temperature of the heating pipeline 62 in real time, ensure that the crude oil is heated to the required temperature, effectively reduce the viscosity of the crude oil, improve the transportation efficiency, ensure that the power is cut off in time in the case of over-temperature or abnormal conditions, stop the equipment operation and send out an alarm signal, avoid equipment damage and potential safety hazards, and improve the safety of the system. The frequency conversion system 69 converts 380V50Hz AC power into 2000Hz medium frequency power, and the electromagnetic coil 64 works on the heating pipeline 62, using high frequency The electromagnetic field works on the heating pipeline 62, causing eddy currents to generate heat inside the pipeline, thereby improving the heating efficiency. The medium-frequency electric heating technology is more stable and reliable than traditional heating methods, and can provide continuous and uniform heating effects, ensuring that the crude oil maintains a constant temperature during transportation, which contributes to a smooth and efficient production process. The oil inlet interface 61 and the oil outlet interface 66 are respectively fixedly connected to the series valve 5, and the series valve 5 and the parallel valve 4 are installed in parallel. By closing the series valve 5 and opening the parallel valve 4, the heating device 6 can be disassembled for maintenance without interrupting the normal production of the oil well, thereby improving maintenance efficiency and operational flexibility.

[0024] Working principle: Under normal production conditions of the oil well, the required heating power is determined according to the properties of the crude oil produced by the oil well, and then a heating device 6 is installed on the oil pipeline 3 ten meters away from the wellhead 2. The oil inlet interface 61 and the oil outlet interface 66 of the heating device 6 are respectively installed with series valves 5, and a parallel valve 4 is installed between the series valves 5. The crude oil produced by the pumping unit 1 comes out of the wellhead 2 and is transported to the transfer station through the oil pipeline 3.

[0025] During normal operation, the parallel valve 4 is closed, the two series valves 5 are opened, and the oil well output fluid passes through the wellhead 2 intelligent heating device 6, so that the liquid temperature is raised to the required temperature and then sent to the transfer station. When the heating device 6 fails and needs to be returned to the factory for repair, the two series valves 5 are closed, the parallel valve 4 is opened, and the heating device 6 is removed to keep the oil well in normal production.

[0026] After the pipeline process connection is completed, power is supplied to the intelligent heating device 6 at the wellhead 2, and the output power, output temperature and overheat protection temperature are set according to the crude oil transmission temperature requirements, and then the equipment is put into operation.

[0027] In the heating device 6, the frequency conversion system 69 can convert the 380V 50Hz industrial frequency AC into DC after rectification and filtering, and then convert the DC into a frequency-controllable high-frequency AC output. The high-frequency AC generates a high-frequency changing magnetic field through the electromagnetic coil 64 to act on the heating pipeline 62 under the thermal insulation layer 63. Under the action of the high-frequency magnetic field, eddy currents are generated inside the heating pipeline 62 to generate heat. Since there is a thermal insulation layer 63 outside the heating pipeline 62, the generated heat can only be transferred to the liquid in the pipeline. After the liquid absorbs the heat, the temperature rises rapidly, the viscosity is greatly reduced, the pipeline back pressure is no longer so high, and the crude oil pipeline transportation is carried out smoothly.

[0028] To achieve safe operation, the temperature transmitter 65 and the temperature controller 67 in the heating device 6 constantly monitor the temperature changes in the heating section of the oil pipeline 3. When there is no liquid flowing through the heating section of the oil pipeline 3 and over-temperature occurs, the PLC control system 68 will immediately cut off the power supply, stop the equipment from running, send out an alarm signal, and record the fault information.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A wellhead intelligent heating device, comprising an oil pump (1), a wellhead (2), an oil pipeline (3), a parallel valve (4), a series valve (5) and a heating device (6), characterized in that: The heating device (6) is installed on the oil pipeline (3), the series valve (5) is installed between the heating device (6) and the oil pipeline (3), and the parallel valve (4) is connected in parallel with the heating device (6); The heating device (6) comprises an oil inlet interface (61), a heating pipeline (62), a thermal insulation layer (63), an electromagnetic coil (64), a temperature transmitter (65), an oil outlet interface (66), a temperature controller (67), a PLC control system (68) and a frequency conversion system (69); the lower portion of the heating pipeline (62) is fixedly connected to the oil inlet interface (61); the upper portion of the heating pipeline (62) is fixedly connected to the oil outlet interface (66); the electromagnetic coil (64) is wound around the outer surface of the heating pipeline (62); the electromagnetic coil (64) is connected to the output port of the frequency conversion system (69); and the sensor of the temperature transmitter (65) is closely attached to the heating pipeline (62).

2. The wellhead intelligent heating device according to claim 1 is characterized in that: The oil inlet interface (61) and the oil outlet interface (66) are respectively fixedly connected to the series valve (5), and the series valve (5) and the parallel valve (4) are installed in parallel.

3. The wellhead intelligent heating device according to claim 1 is characterized in that: The thermal insulation layer (63) is wrapped around the outer surface of the heating pipeline (62), and the thermal insulation layer (63) is located between the electromagnetic coil (64) and the heating pipeline (62).

4. The wellhead intelligent heating device according to claim 1 is characterized in that: The temperature signal sensed by the temperature transmitter (65) is transmitted to the temperature controller, and the PLC control system (68) receives information from the temperature controller (67) and the frequency converter.

5. The wellhead intelligent heating device according to claim 1 is characterized in that: The frequency conversion system (69) converts the 380V 50Hz alternating current into 2000Hz medium frequency electricity, and the electromagnetic coil (64) performs work on the heating pipeline (62).

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