Ice blockage prevention device for natural gas pipeline

Abstract

The invention discloses an ice blockage prevention device for a natural gas pipeline, and belongs to the technical field of oil-gas exploration and development, the ice blockage prevention device for the natural gas pipeline comprises a coil component which is arranged along a test flow pipeline, and an action interval for accommodating the test flow pipeline is limited in the coil component; and the current generation assembly is configured to output alternating current to the coil component, so that an alternating magnetic field is generated in the action interval. The ice blockage prevention device composed of the coil component and the current generation assembly is arranged, the electromagnetic induction heating principle is utilized, heating of the testing process pipeline is achieved, the temperature rising speed is obviously better than that of other contact heat conduction modes such as an electric tracing band and steam, the temperature rising temperature is controllable, and the temperature of the testing process pipeline can be kept at a high temperature value.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas exploration and development, and in particular relates to an anti-ice blocking device for a natural gas pipeline. Background Art

[0002] Surface testing of natural gas wells is an important technical means to evaluate gas reservoirs. The gas-liquid mixed fluid produced by the formation is depressurized, separated, and measured through the surface testing process, so as to obtain some important parameters of the gas reservoir, such as the properties of the formation fluid, stable production, gas-liquid ratio, compression coefficient, etc.; the underground gas-liquid mixed fluid is in a high-temperature and high-pressure state when it is exported to the wellhead. After throttling and reducing the pressure through the nozzle manifold, the volume increases sharply and the temperature also drops rapidly. Under this high-pressure and low-temperature environment, the mixed fluid in the pipeline will generate natural gas hydrates. The state of this natural gas hydrate is similar to ice, which can easily block the pipeline and cause equipment overpressure, bringing great risks to the operating equipment and operators; in order to prevent the formation of natural gas hydrates in the testing process and avoid blocking the pipeline to cause safety risks, it is necessary to heat and insulate the gas-liquid mixed fluid after throttling and reducing the pressure.

[0003] At present, the ground test operation of natural gas wells mainly adopts three methods to prevent ice blockage in the ground test process. The first method is to first wrap the electric heating tape around the pipeline, and then wrap the insulation layer around the pipeline wrapped with the electric heating tape. The insulation layer is composed of felt cloth and plastic cloth from the inside to the outside. However, the electric heating tape heats up slowly, and the maximum temperature is only about 90°C. The insulation effect is poor and cannot completely prevent ice blockage. At the same time, the felt cloth and plastic cloth are scrapped after one use, which is not environmentally friendly. The second method: This method requires a dedicated person to operate, with the help of special injection and recovery equipment, ethylene glycol antifreeze is injected into the gas-liquid mixed fluid, but the injection amount of ethylene glycol antifreeze is not easy to grasp. If the injection amount is insufficient, ice blockage will still occur. If the injection amount is too much, it will cause cost waste. In addition, ethylene glycol is a toxic chemical, which is harmful to the human body and is not conducive to transportation and storage. The third method: A fuel steam generator boiler is configured at the operation site, and the high-temperature steam generated by the boiler is guided to the throttling and pressure reduction process, and the pipeline is heated by the steam heat; but this method consumes a lot of energy , and the heating efficiency is extremely low, especially in the severe cold environment in winter, most of the steam heat escapes into the air and loses the heating effect. Furthermore, patent document CN215337095U discloses an intelligent natural gas throttling and ice blocking prevention device, including an intelligent remote monitoring temperature recorder in a movable box, an intelligent power socket switch knob, a liquid level display meter, a circulating pipeline pump, and an intelligent water heater, which are connected to a flexible heat exchange bag covering a valve body part prone to ice blocking in a natural gas production and transportation station through a water circulation pipeline. By remotely operating the intelligent power socket, the circulating pipeline pump and the linked intelligent water heater heating work are realized, and the water flow is realized in a closed-loop circulation in the pipeline, so as to achieve the purpose of heat energy exchange to prevent ice blocking at the throttling part; this technology requires covering a flexible heat exchange bag at a position prone to ice blocking, establishing a hot water circulation path, and heating and insulating the pipeline through hot water circulation. The hot water has a large heat loss during the circulation process, and the heat exchange efficiency with the pipeline is low. It is not suitable for severe cold working environments, the equipment is complex, and the energy consumption is large, and it is also not conducive to rapid installation. Summary of the invention

[0004] The object of the present invention is to provide an anti-icing and blocking device for a natural gas pipeline, so as to solve the drawbacks of the existing anti-icing and blocking device during use as mentioned in the background art.

[0005] To achieve the above object, the present invention provides the following technical solution: a natural gas pipeline anti-ice blockage device, comprising:

[0006] A coil component is arranged along the test process pipeline, and an action area for accommodating the test process pipeline is defined in the coil component;

[0007] The current generating component is configured to output an alternating current to the coil component so as to generate an alternating magnetic field in the action interval.

[0008] Preferably, the coil component has:

[0009] The first part extends along the axial direction of the test process pipeline process;

[0010] The second part extends along the axial direction of the test process pipeline and is arranged parallel to the first part;

[0011] The connecting portion extends along the axial direction of the test process pipeline and connects the first part and the second part on one side of the direction of the first part and the second part.

[0012] Preferably, the coil component is configured as a "U"-shaped component.

[0013] Preferably, the current generating component comprises:

[0014] A transformer component, wherein the input end of the transformer is connected to an external power supply line via a power line;

[0015] A circuit board component, wherein an input end of the circuit board component is connected to an output end of the transformer component, and an output end of the circuit board component is connected to the coil component.

[0016] Preferably, the circuit board component is a ZVS circuit board.

[0017] Preferably, the anti-icing and blocking device further includes a temperature measuring component, and the temperature measuring component includes:

[0018] A temperature measuring component configured to measure the temperature of a test process pipeline;

[0019] The display component is electrically connected to the temperature measuring component and is used to display the measured temperature data in real time.

[0020] Preferably, the anti-icing and blocking device further comprises a box component, and the current generating assembly is integrated into the box component.

[0021] Preferably, a heat dissipation component is provided in the box component and is configured to cool down at least part of the components of the current generating assembly.

[0022] Preferably, the anti-icing blockage device further comprises a pad block component, and the pad block component is configured to support the coil component and adjust the position height of the coil component.

[0023] Preferably, the cushion block component is made of cork.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present application sets up an anti-icing and blocking device consisting of a coil component and a current generating component, and utilizes the principle of electromagnetic induction heating to output alternating current to the coil component through the current generating component. The coil component generates an alternating magnetic field within the action interval based on the alternating current. The test process pipeline is placed within the action interval and cuts the alternating magnetic lines of force, thereby generating eddy currents inside the test process pipeline. The eddy currents cause the atoms inside the test process pipeline to move irregularly at high speed, and the atoms collide and rub against each other to generate heat energy. The heating process occurs almost instantaneously, and the heating rate is significantly better than other contact heat conduction methods such as electric heating tapes and steam.

[0026] 2. This application directly heats the test process pipeline. The pipeline serves as a heat source to directly heat the gas-liquid mixed fluid in the pipe. Compared with the heat conduction method of first heating the pipeline and then conducting heat to the gas-liquid mixed fluid in the pipe, the heat exchange efficiency is significantly improved.

[0027] 3. When the application heats the test process pipeline, the heating temperature is related to the input voltage. The heating temperature can reach 200°C. The outside temperature will not affect its heating efficiency, and it is suitable for severe cold working environments.

[0028] 4. The present application can detect the temperature of the heated test process pipeline in real time. By adjusting the adjustable transformer control switch knob, the temperature of the heated test process pipeline can be kept at a constant high temperature at all times, without the need for external insulation measures and without generating waste.

[0029] 5. This application consists of two parts: a chassis and an induction coil, which is small in size, easy to install and has low energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of the anti-icing device.

[0031] In the figure:

[0032] 100, coil component; 100a, first part; 100b, joint part; 100c, second part; 101, action zone;

[0033] 200, current generating component; 201, transformer component; 202, circuit board component;

[0034] 300, temperature measuring component; 301, temperature measuring component; 302, display component;

[0035] 400, box body component; 401, cushion block component; 402, heat dissipation component;

[0036] 500. Test process pipeline. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] An anti-icing device for a natural gas pipeline (hereinafter referred to as the anti-icing device) includes a coil component 100, which is arranged roughly along a test process pipeline 500, and an action zone 101 for accommodating (placing) the test process pipeline 500 is defined in the coil component 100. In some examples, the coil component 100 has a first part 100a and a second part 100c arranged in parallel, and a joint 100b connecting the first part 100a and the second part 100c. The first part 100a, the second part 100c and the joint 100b constituting the coil component 100 all extend along the axial direction of the test process pipeline 500, wherein the joint 100b extends from the test process pipeline 500 along the test process pipeline 500. Located on one side of the first part 100a and the second part 100c when viewed in the axial direction, the coil component 100 has an open end to facilitate the arrangement of the coil component 100 (even if the test process pipeline 500 is arranged in the effective interval 101). Specifically, when the anti-icing blockage device is in use, the test process pipeline 500 is located between the first part 100a and the second part 100c of the coil component 100, and the distances from the test process pipeline 500 to the first part 100a and the second part 100c are equal. In some examples, the above-mentioned coil component 100 is roughly constructed as a "U"-shaped component, that is, the cross-section of the joint 100b is constructed as an arc, and the center of the joint 100b coincides with the center of the coil component 100.

[0039] The current generating component 200 is configured to generate an alternating current, and the output end of the current generating component 200 is connected to the above-mentioned coil component 100. The coil component 100 generates an alternating magnetic field based on the alternating current output by the current generating component 200. The test process pipeline 500 placed in the action area 101 of the coil component 100 cuts the magnetic flux lines during the change of the alternating magnetic field, so that eddy currents are generated in the test process pipeline 500. The eddy currents cause the atoms inside the test process pipeline 500 to move irregularly. The atoms collide and rub against each other during the movement to generate heat energy, thereby heating the test process pipeline 500, thereby avoiding the formation of natural gas hydrates in the test process pipeline 500. At the same time, electromagnetic induction heating directly heats the test process pipeline. The test process pipeline acts as a heat source to directly heat the gas-liquid mixed fluid in the pipe. Compared with the heat conduction method of first heating the pipeline and then conducting heat to the gas-liquid mixed fluid in the pipe, the heat exchange efficiency is significantly improved.

[0040] Reference Figure 1 In some examples, the main body of the current generating component 200 is composed of a transformer component 201 and a circuit board component 202, wherein the input end of the transformer component 201 is connected to the external power supply line through a power line, and the circuit board component 202 is configured as a connector between the transformer component 201 and the coil component 100. In some examples, the transformer component 201 is configured as an adjustable transformer, which can adjust the output voltage (current) of the transformer component 201 through a component such as a knob, and then adjust the heating temperature, so that the temperature of the test process pipeline 500 can be maintained at a high temperature. In other embodiments, the circuit board component 202 is configured as a ZVS circuit board, and the coil component 100 is connected to the self-coil interface of the ZVS circuit board, and together with the ZVS circuit board, it constitutes a ZVS induction heating circuit.

[0041] Reference Figure 1 The anti-icing device further includes a pad component 401, which is configured to support the coil component 100 and can adjust the position height of the coil component 100, that is, to adjust the position of the test process pipeline 500 in the action interval 101. Exemplarily, the pad component 401 is a square block made of cork material and has an upper support surface. The first part 100a of the coil component 100

[0042] In some examples, the transformer component 201 and the circuit board component 202 in the current generating component 200 are integrated in a box component 400. On the one hand, the box component 400 can protect the internal components (such as the transformer component 201 and the circuit board component 202). On the other hand, integrating the transformer component 201 and the like in the box component 400 can facilitate the overall carrying and arrangement of the anti-icing and blocking device, thereby improving the convenience of using the anti-icing and blocking device.

[0043] Reference Figure 1 The above-mentioned anti-icing and blocking device also includes a temperature measuring component 300. In some examples, the temperature measuring component 300 includes a temperature measuring component 301 (such as a temperature sensor) and a display component 302 (such as a display screen), wherein the temperature measuring component 301 is configured to measure the temperature of the test process pipeline 500, and display the measured data through the display component 302 to facilitate the staff to monitor the state of the test process pipeline 500, and control the current generating component 200 based on the state of the test process pipeline 500 (such as freezing), for example, by controlling the transformer component 201 to adjust the alternating current in the coil component 100.

[0044] In some examples, the anti-icing and blocking device further includes a heat dissipation component 402, which is disposed in the box component 400 and is configured to cool down at least part of the components in the current generating assembly 200 during the operation of the anti-icing and blocking device, so as to ensure that the anti-icing and blocking device can operate for a long time. Figure 1 The heat dissipation component 402 (eg, air cooling component) arranged at the position of the circuit board component 202 is exemplarily shown in FIG.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A natural gas pipeline anti-ice blocking device, characterized in that: include: A coil component is arranged along the test process pipeline, and an action area for accommodating the test process pipeline is defined in the coil component; The current generating component is configured to output an alternating current to the coil component so as to generate an alternating magnetic field in the action interval.

2. The anti-icing device for a natural gas pipeline according to claim 1, characterized in that: The coil component has: The first part extends along the axial direction of the test process pipeline process; The second part extends along the axial direction of the test process pipeline and is arranged parallel to the first part; The connecting portion extends along the axial direction of the test process pipeline and connects the first part and the second part on one side of the direction of the first part and the second part.

3. The anti-icing device for a natural gas pipeline according to claim 1 or 2, characterized in that: The coil component is constructed as a "U"-shaped component.

4. The anti-icing device for a natural gas pipeline according to claim 1, characterized in that: The current generating component comprises: A transformer component, wherein the input end of the transformer is connected to an external power supply line via a power line; A circuit board component, wherein an input end of the circuit board component is connected to an output end of the transformer component, and an output end of the circuit board component is connected to the coil component.

5. The anti-icing device for a natural gas pipeline according to claim 4, characterized in that: The circuit board component is a ZVS circuit board.

6. The anti-icing device for a natural gas pipeline according to claim 1, characterized in that: The anti-icing and blocking device further includes a temperature measuring component, which includes: A temperature measuring component configured to measure the temperature of a test process pipeline; The display component is electrically connected to the temperature measuring component and is used to display the measured temperature data in real time.

7. The anti-icing device for a natural gas pipeline according to claim 1, characterized in that: The anti-icing and blocking device also includes a box body component, and the current generating component is integrated in the box body component.

8. The device for preventing ice blockage of a natural gas pipeline according to claim 7, characterized in that: A heat dissipation component is disposed in the box body component and is configured to cool down at least part of the components of the current generating assembly.

9. The device for preventing ice blockage of a natural gas pipeline according to claim 1, characterized in that: The anti-icing and blocking device further includes a pad block component, and the pad block component is configured to support the coil component and adjust the position height of the coil component.

10. The device for preventing ice blockage of a natural gas pipeline according to claim 9, characterized in that: The cushion block component is made of cork.

Images