Gas dredging and blockage removing device for petroleum mixed transportation

Abstract

The utility model relates to the technical field of oil field gathering and multiphase mixed transportation, in particular to a gas dredging and blocking removing device for petroleum mixed transportation, which comprises a multiphase mixing device, a gas dredging device and a blocking removing device, wherein the multiphase mixing device is provided with an input interface, a liquid supplementing interface and an output interface; the smile separation device is mounted on the pipeline, the smile separation device is mounted on the pipeline connected with the output interface of the multi-phase mixing device, and the smile separation device is provided with a pipe inlet, a pipe outlet and a liquid taking interface; the liquid taking connector is connected with a liquid inlet of the liquid storage tank through a pipeline, and a liquid outlet of the liquid storage tank is connected with the multi-phase mixing device through a pipeline; the multiphase pump is mounted on the pipeline between the multiphase mixing device and the smile separation device; the pressure sensor is mounted on a pipeline connected with the input interface of the multi-phase mixing device; and the flow sensor is arranged on a pipeline connected with the pipe outlet of the smile separation device. According to the air dredging and blockage removing device, the phase separation influence caused by the density difference of the multiphase medium of the incoming liquid can be reduced, so that the occurrence frequency of the air blockage phenomenon is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of multiphase mixed transportation in oilfield gathering and transportation, and particularly relates to a gas-venting and plugging-removing device for petroleum mixed transportation. Background Technique

[0002] In oilfield development, the fluid extracted from oil wells is usually not a single fluid, but a complex multiphase mixture containing gas, liquid, and solid particles. During short-distance transportation, they are mainly driven by the energy inherent in the oil reservoir. However, in traditional oil production and transportation processes, when the energy of the oil reservoir is insufficient to drive these multiphase mixtures, additional transportation methods need to be adopted. The traditional method is to separate gas, liquid, and solid, and then use pumps and compressors to pressurize and transport the liquid and gas respectively. However, this separation and transportation method not only has a cumbersome process, is time-consuming and costly for the entire process, but also requires specialized personnel for monitoring and operation, increasing labor costs. To address the problems existing in traditional oil production and transportation technologies, multiphase mixed transportation technology is emerging. Multiphase mixed transportation technology is a new technology that directly mixes, pressurizes, and transports the well products of oil wells to the gathering station without separating multiphase media, which can simplify the production process, reduce engineering investment and wellhead backpressure, and increase production and benefits.

[0003] During the transportation of multiphase media, the mixed transportation pump is limited by the content of gas, liquid, and solid in the multiphase media. When the incoming flow at the inlet of the mixed transportation pump is a pure gas slug or the liquid volume is extremely small (i.e., high gas-liquid ratio), gas blockage will occur at the pump inlet, resulting in increased pressure, increased safety hazards, reduced pump efficiency, shortened pump life, and even failure of multiphase media mixed transportation in severe cases. However, currently, for the gas blockage problem, it mainly relies on a separate liquid addition device to directly add liquid to remove the blockage or manual exhaust to remove the blockage. Adding liquid directly by the liquid addition device to remove the blockage increases costs and energy consumption. Manual exhaust to remove the blockage adds a gas treatment link, which may pollute the environment and is not conducive to the construction and development of intelligent oilfields. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a gas-venting and plugging-removing device for petroleum mixed transportation, so as to at least solve the problem of gas blockage occurring in the fully enclosed continuous multiphase mixed transportation of oil, gas, and sand at the oil well site.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] According to an embodiment of the utility model, there is provided a gas-venting and plugging-removing device for petroleum mixed transportation, including:

[0007] A pipeline for transporting multiphase media;

[0008] A multiphase mixing device is installed on a pipeline for liquid supplement mixing. The multiphase mixing device has an input interface, a liquid supplement interface, and an output interface;

[0009] A laughing mouth separation device is installed on a pipeline. The laughing mouth separation device is installed on the pipeline connected to the output interface of the multiphase mixing device. The laughing mouth separation device is used for gas-liquid separation of multiphase media. The laughing mouth separation device has an inlet pipe opening, an outlet pipe opening, and a liquid extraction interface;

[0010] A liquid storage tank is used for storing liquid. The liquid extraction interface is connected to the liquid inlet of the liquid storage tank through a pipeline. The liquid outlet of the liquid storage tank is connected to the multiphase mixing device through a pipeline;

[0011] A mixed transportation pump is installed on the pipeline between the multiphase mixing device and the laughing mouth separation device;

[0012] A pressure sensor is installed on the pipeline connected to the input interface of the multiphase mixing device;

[0013] A flow sensor is installed on the pipeline connected to the outlet pipe opening of the laughing mouth separation device.

[0014] For the gas-removing and plugging-removing device for oil mixed transportation adopting the above technical scheme, when the liquid volume in the multiphase medium input into the gas-removing and plugging-removing device is small (gas content > 75%) or there is no liquid volume (gas content 100%) or the inlet pressure sensor shows too high pressure, the liquid in the liquid storage tank enters the multiphase mixing device through the liquid outlet via the liquid supplement pipeline and mixes with the multiphase medium input into the multiphase mixing device, realizing liquid supplement for the mixed transportation pump, so as to adjust the gas-liquid ratio of the incoming liquid volume at the inlet of the mixed transportation pump, thereby reducing the inlet pressure and avoiding gas blockage at the inlet of the mixed transportation pump, which may lead to a decrease in the pump efficiency, and being beneficial to the smooth transportation of the multiphase medium of oil. Among them, the multiphase mixing device mixes the input multiphase medium and the liquid supplement, avoiding the occurrence of gas blockage caused by gas-liquid separation. The laughing mouth separation device is used for gas-liquid separation of the medium pumped out by the mixed transportation pump and separates according to the gas-liquid density difference.

[0015] In some embodiments, the laughing mouth separation device includes:

[0016] An upper lip pipe is installed between the inlet pipe opening and the outlet pipe opening;

[0017] A lower lip pipe is installed in parallel with the upper lip pipe between the inlet pipe opening and the outlet pipe opening. The liquid extraction interface is installed on the lower lip pipe. The upper lip pipe bends into an arc shape away from the lower lip pipe, and the lower lip pipe bends into an arc shape away from the upper lip pipe.

[0018] In some embodiments, the radian of the arc where the upper lip pipe is located is smaller than the radian of the arc where the lower lip pipe is located.

[0019] In some embodiments, the inner diameter of the upper lip tube is smaller than the inner diameter of the lower lip tube.

[0020] In some embodiments, a first sewage discharge valve is installed at the middle position of the lower lip tube.

[0021] In some embodiments, the liquid storage tank includes:

[0022] A tank body, on which a liquid level sensor is installed, and the liquid level sensor is used to detect the liquid level inside the tank body;

[0023] A liquid inlet, installed on the tank body and communicating with the inside of the tank body;

[0024] A safety pipe orifice, located at the top of the tank body, and a safety valve is installed on the safety pipe orifice;

[0025] A liquid outlet, installed on the tank body and communicating with the inside of the tank body, and the liquid outlet is connected to the liquid supplement interface of the multiphase mixing device through a pipeline;

[0026] A sewage outlet, located at the bottom of the tank body, and a second sewage discharge valve is connected to the sewage outlet.

[0027] In some embodiments, a liquid supplement pump is installed on the pipeline connecting the liquid storage tank and the multiphase mixing device;

[0028] In some embodiments, one-way valves and electric valves are installed on the pipeline connecting the liquid supplement pump and the multiphase mixing device, and on the pipeline connecting the gas-liquid separation device and the liquid storage tank.

[0029] In some embodiments, the gas venting and plugging removal device further includes a base, and the liquid supplement pump, the mixed transportation pump, and the liquid storage tank are all fixedly installed on the base.

[0030] In some embodiments, the multiphase mixing device includes a turntable, and the input interface, the liquid supplement interface, and the output interface are all welded on the turntable, and the input interface, the liquid supplement interface, and the output interface are all communicated with the inside of the turntable.

[0031] The gas-liquid separation and blockage removal device for oil multi-phase transportation of the present utility model can reduce the influence of phase separation caused by the density difference of the multi-phase medium of the incoming liquid, thereby reducing the occurrence frequency of gas blockage. The gas-liquid separation and blockage removal device of the present utility model can automatically separate the transported multi-phase medium and automatically store the excess liquid. It can directly ensure the stability of multi-phase transportation through the circulation of its own incoming liquid, without the need to additionally provide liquid from the outside for liquid supplementation, nor the need for manual exhaust. Moreover, it is green and environmentally friendly, with reduced energy consumption and lower costs. The entire device of the gas-liquid separation and blockage removal device of the present utility model has a simple structure and is convenient for processing and maintenance. It adopts a combination of front-end mixing (realized by a multi-phase mixing device) and rear-end separation (realized by a laughing mouth separation device). Through a four-in-one transportation method of normal incoming liquid transportation, incoming liquid storage, incoming liquid extraction, and liquid supplementation transportation, it realizes the normal and continuous transportation of the oil coming from the wellhead, can reduce costs, improve efficiency, and optimize the multi-phase transportation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of the gas-liquid separation and blockage removal device for oil multi-phase transportation of the present utility model;

[0033] Figure 2 is a top view of the gas-liquid separation and blockage removal device for oil multi-phase transportation of the present utility model;

[0034] Figure 3 are the three-view drawings of the laughing mouth separation device;

[0035] Figure 4 is a schematic structural diagram of the liquid storage tank;

[0036] Figure 5 are the three-view drawings of the multi-phase mixing device;

[0037] Figure 6 is a schematic structural diagram of the base;

[0038] Among them, the inlet pipeline 110, the intermediate pipeline 120, the outlet pipeline 130, the liquid extraction pipeline 140, the liquid supplement pipeline 150, the multiphase mixing device 200, the input interface 210, the liquid supplement interface 220, the output interface 230, the turntable 240, the laughing mouth separation device 300, the inlet pipe orifice 310, the outlet pipe orifice 320, the liquid extraction interface 330, the upper lip pipe 340, the lower lip pipe 350, the first sewage discharge valve 360, the liquid storage tank 400, the liquid inlet 410, the liquid outlet 420, the cylinder body 430, the upper head 440, the lower head 450, the safety pipe orifice 460, the safety valve 461, the liquid level sensor 470, the first reinforcement ring 481, the second reinforcement ring 482, the third reinforcement ring 483, the sewage discharge port 490, the second sewage discharge valve 491, the multiphase pump 510, the liquid supplement pump 520, the pressure sensor 600, the flow sensor 700, the base 800, the lifting ring 810, the external channel steel base 820, the liquid storage tank channel steel base 830, the liquid supplement pump channel steel base 840, the multiphase pump channel steel base 850, the one-way valve 910, the electric valve 920. Specific embodiments

[0039] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can understand the advantages and effects of the present utility model from the content disclosed in this specification. It should be noted that the drawings provided in the following embodiments are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the present utility model. In order to better illustrate the embodiments of the present utility model, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0040] In the drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0041] Please refer to Figure 1-6 :

[0042] The gas venting and plugging removal device for oil multiphase transportation of the present utility model includes a pipeline, a multiphase mixing device 200, a laughing mouth separation device 300, a liquid storage tank 400, a multiphase transportation pump 510, a pressure sensor 600, and a flow sensor 700. The pipeline is used for transporting multiphase media, which are mainly media mixed with gas phase and liquid phase. The multiphase mixing device 200 is installed on the pipeline and is used for replenishing liquid and mixing when the gas-liquid ratio of the input multiphase media is relatively high, so as to reduce the gas-liquid ratio of the output multiphase media. The multiphase mixing device 200 has an input interface 210, a liquid replenishing interface 220, and an output interface 230. The laughing mouth separation device 300 is installed on the pipeline. The laughing mouth separation device 300 is installed on the pipeline connected to the output interface 230 of the multiphase mixing device 200. The laughing mouth separation device 300 is used for gas-liquid separation of the multiphase media. The laughing mouth separation device 300 has an inlet pipe 310, an outlet pipe 320, and a liquid taking interface 330. The liquid storage tank 400 is used for storing liquid. The liquid taking interface 330 is connected to the liquid inlet 410 of the liquid storage tank 400 through a pipeline. The liquid outlet 420 of the liquid storage tank 400 is connected to the multiphase mixing device 200 through a pipeline. The multiphase transportation pump 510 is installed on the pipeline between the multiphase mixing device 200 and the laughing mouth separation device 300. The pressure sensor 600 is installed on the pipeline connected to the input interface 210 of the multiphase mixing device 200. The flow sensor 700 is installed on the pipeline connected to the outlet pipe 320 of the laughing mouth separation device 300.

[0043] For the gas venting and plugging removal device for oil multiphase transportation adopting the above technical solution, when the liquid volume in the multiphase media input into the gas venting and plugging removal device is small (gas content > 75%) or there is no liquid volume (gas content 100%) or the inlet pressure sensor 600 shows that the pressure is too high, the liquid in the liquid storage tank 400 enters the multiphase mixing device 200 through the liquid outlet via the liquid replenishing pipeline and mixes with the multiphase media input into the multiphase mixing device 200, so as to replenish the multiphase transportation pump 510, and thus adjust the gas-liquid ratio of the liquid volume coming into the inlet of the multiphase transportation pump 510, thereby reducing the inlet pressure and avoiding gas blockage at the inlet of the multiphase transportation pump 510, which may cause the reduction of the pump efficiency, and being beneficial to the smooth transportation of oil with multiphase media. Among them, the multiphase mixing device 200 mixes the input multiphase media and the replenished liquid to avoid the occurrence of gas blockage caused by gas-liquid separation. The laughing mouth separation device 300 is used for gas-liquid separation of the media pumped out by the multiphase transportation pump 510 and separates according to the gas-liquid density difference.

[0044] The pipeline includes an inlet pipeline 110, an intermediate pipeline 120, an outlet pipeline 130, a liquid extraction pipeline 140, and a liquid replenishment pipeline 150. The inlet pipeline 110 is a pipeline connected to the input interface 210 of the multiphase mixing device 200. The intermediate pipeline 120 is a pipeline between the multiphase mixing device 200 and the laughing orifice separation device 300. The outlet pipeline 130 is a pipeline connected to the outlet nozzle 320 of the laughing orifice separation device 300. The liquid extraction pipeline 140 is a pipeline between the liquid extraction interface 330 and the liquid storage tank 400. The liquid replenishment pipeline 150 is a pipeline between the liquid storage tank 400 and the multiphase mixing device 200. A pressure sensor 600 is installed on the inlet pipeline 110 to detect the pressure on the inlet pipeline 110. A flow sensor 700 is installed on the outlet pipeline 130 to detect the flow rate on the outlet pipeline 130.

[0045] Please refer to Figure 3 , the laughing orifice separation device 300 includes an upper lip pipe 340 and a lower lip pipe 350. The upper lip pipe 340 is installed between the inlet nozzle 310 and the outlet nozzle 320. The lower lip pipe 350 is installed in parallel with the upper lip pipe 340 between the inlet nozzle 310 and the outlet nozzle 320. The liquid extraction interface 330 is installed on the lower lip pipe 350. The upper lip pipe 340 is bent into an arc shape away from the lower lip pipe 350, and the lower lip pipe 350 is bent into an arc shape away from the upper lip pipe 340. When the laughing orifice separation device 300 works, the upper lip pipe 340 is located above the lower lip pipe 350. The medium pumped out by the hybrid pump 510 enters from the inlet nozzle 310. According to the gas-liquid density difference, the liquid with a larger density is collected in the lower lip pipe 350, and the liquid with a smaller density is collected in the upper lip pipe 340. The design of the upper lip pipe 340 and the lower lip pipe 350 that are bent away from each other is more conducive to improving the gas-liquid separation effect.

[0046] Among them, the radian of the arc where the upper lip pipe 340 is located is smaller than the radian of the arc where the lower lip pipe 350 is located. With such a design, the drop of the liquid entering the lower lip pipe 350 is increased, and under the action of gravity, it is more conducive to the liquid entering the lower lip pipe 350, further improving the gas-liquid separation effect.

[0047] The inner diameter of the upper lip pipe 340 is smaller than the inner diameter of the lower lip pipe 350, which is conducive to the collection of liquid. A first sewage discharge valve 360 is installed at the middle position of the lower lip pipe 350 to discharge the impurities accumulated during the medium transportation, preventing blockage caused by the accumulation of impurities.

[0048] Please refer to Figure 4, the liquid storage tank 400 includes a tank body, a liquid inlet 410, a safety pipe orifice 460, a liquid outlet 420, and a sewage outlet 490. A liquid level sensor 470 is installed on the tank body, and the liquid level sensor 470 is used to detect the liquid level inside the tank body. In this embodiment, the tank body includes a cylindrical body 430 and an upper head 440 and a lower head 450 respectively installed at opposite ends of the cylindrical body 430. The upper head 440 and the lower head 450 are fixedly connected to the cylindrical body 430 by bolts and nuts in cooperation with a first flange. The cylindrical body 430 has a sensor interface, and the liquid level sensor 470 is installed on the sensor interface. The liquid level sensor 470 and the sensor interface are connected by bolts and nuts in cooperation. The liquid inlet 310 is installed on the tank body and communicates with the inside of the tank body. The liquid inlet 310 is connected to the liquid extraction pipeline 140 by bolts and nuts in cooperation. The sensor interface, the liquid inlet 410, and the liquid outlet 420 are all welded to the cylindrical body 430 by a first reinforcing ring 481.

[0049] The safety pipe orifice 460 is located at the top of the tank body. Specifically, the safety pipe orifice 460 is welded to the upper head 440 by a second reinforcing ring 482. A safety valve 461 is installed on the safety pipe orifice 460. The safety pipe orifice 460 and the safety valve 461 are connected by bolts and nuts in cooperation. When there is a large amount of gas and high air pressure in the liquid storage tank 400, in order to ensure safety, the exhaust can be opened through the safety valve 461.

[0050] The liquid outlet 420 is installed on the tank body and communicates with the inside of the tank body. The liquid outlet 420 is connected to the liquid replenishment interface 220 of the multiphase mixing device 200 through a liquid replenishment pipeline 150. The sewage outlet 490 is located at the bottom of the tank body. The sewage outlet 490 is welded to the lower head 450 by a third reinforcing ring 483. A second sewage valve 491 is connected to the sewage outlet 490. The second sewage valve 491 and the sewage outlet 490 are connected by bolts and nuts in cooperation. By opening the second sewage valve 491, the impurities precipitated inside the liquid storage tank 400 can be discharged. A tripod support is also welded outside the lower head 450, and the tripod support is used to support the tank body.

[0051] A liquid replenishment pump 520 is installed on the pipeline connecting the liquid storage tank 400 and the multiphase mixing device 200. Check valves 910 and electric valves 920 are installed on the pipeline connecting the liquid replenishment pump 520 and the multiphase mixing device 200, and on the pipeline connecting the gas-liquid separation device 300 and the liquid storage tank 400. The setting of the check valve 910 can ensure the one-way flow of the medium and avoid backflow. The electric valve 920 can realize the control of opening or closing the pipeline.

[0052] Please refer to Figure 6, the gas venting and blockage removal device further includes a base 800, and the liquid supplement pump 520, the multiphase transport pump 510, and the liquid storage tank 400 are all fixedly installed on the base 800. Specifically, the base 800 includes a lifting ring 810, an external channel steel base 820, a liquid storage tank channel steel base 830, a liquid supplement pump channel steel base 840, and a multiphase transport pump channel steel base 850. The liquid storage tank channel steel base 830 is connected to the liquid storage tank 400 by bolts and nuts, the liquid supplement pump channel steel base 840 is connected to the liquid supplement pump 520 by bolts and nuts, the multiphase transport pump channel steel base 850 is connected to the multiphase transport pump 510 by bolts and nuts, and the lifting ring 810 is welded to the external channel steel base 820, the liquid storage tank channel steel base 830, the liquid supplement pump channel steel base 840, and the multiphase transport pump channel steel base 850.

[0053] Please refer to Figure 5 , the multiphase mixing device 200 includes a turntable 240, and the input interface 210, the liquid supplement interface 220, and the output interface 230 are all welded on the turntable 240, and the input interface 210, the liquid supplement interface 220, and the output interface 230 are all in communication with the inside of the turntable 240. The inside of the turntable 240 has a cavity. The liquid supplement interface 220 is arranged perpendicular to the upper and lower end faces of the turntable 240, the input interface 210 and the liquid supplement interface 220 are both installed on the side wall of the turntable, the input interface 210 and the liquid supplement interface 220 are respectively located at opposite ends of the turntable, and the fluid flow directions in the input interface 210 and the liquid supplement interface 220 are the same, and the liquid supplement interface 220 is closer to the output interface 230. The input interface 210 is connected to the inlet pipe 110 by a bolt and nut matching method, the liquid supplement interface 220 is connected to the liquid supplement pipe 150 by a bolt and nut matching method, and the output interface 230 is connected to the intermediate pipe 120 by a bolt and nut matching method. The liquid incoming from the input interface 210 in the multiphase mixing device 200 enters along the wall surface of the turntable 240 in a rotational manner, and the liquid incoming from the liquid supplement interface 220 enters perpendicularly to the turntable. The liquid incoming from the input interface 210 and the liquid supplement interface 220 collide and merge with each other in the rotational direction and the vertical direction, so as to realize the mixing of the medium, and the mixed medium enters the multiphase transport pump through the output interface 230.

[0054] In the present utility model, the pressure sensor 600, the inlet pipe 110, the multiphase mixing device 200, the intermediate pipe 120, the multiphase transport pump 510, the gas-liquid separation device 300, the outlet pipe 130, and the flow sensor 700 constitute the normal transportation mechanism of the gas venting and blockage removal device. The liquid extraction pipe 140, the liquid supplement pipe 150, the liquid supplement pump 520, and the liquid storage tank 400 constitute the liquid supplement mechanism of the gas venting and blockage removal device. And among them, the flow sensor 7003, the pressure sensor 60010, and the liquid level sensor 47014 form the detection unit devices, and the first drain valve, the second drain valve, the one-way valve 910, the electric valve 920, and the safety valve 461 form the safety unit.

[0055] In the present utility model, the liquid extraction process is as follows: According to the detection value of the flow sensor 700, when the liquid volume is large (gas content < 75%), the electric valve 920 between the laughing mouth separation device 300 and the liquid storage tank 400 is opened, and the liquid extraction pipeline 140 extracts the liquid passing through the lower lip pipe 350. During the liquid extraction process, the one-way valve 910 is used to prevent the backflow of the medium in the pipe, and the liquid level sensor 470 detects the liquid volume in the liquid storage tank 400. When the liquid volume in the tank reaches the height of the liquid inlet of the liquid storage tank 400, the electric valve 920 between the laughing mouth separation device 300 and the liquid storage tank 400 is closed, and the liquid extraction stops. The liquid supplement process is as follows: When the liquid volume of the medium input into the gas venting and blockage removal device is small (gas content > 75%) or there is no liquid volume (gas content 100%) or the inlet pressure sensor 600 shows that the pressure is too high, the liquid in the liquid storage tank 400 enters the multiphase mixing device 200 through the liquid outlet driven by the liquid supplement pump 520 via the liquid supplement pipeline 150 to supplement the liquid to the mixed transportation pump 510, so as to adjust the gas-liquid ratio of the liquid incoming at the inlet of the mixed transportation pump 510, thereby reducing the inlet pressure. The liquid supplement volume is adjusted by the electric valve 920.

[0056] In the present utility model, when neither liquid supplement nor liquid extraction is required, the input medium directly enters the multiphase mixing device 200 through the inlet pipeline 110, and is output through the intermediate pipeline 120, the mixed transportation pump 510, and the laughing mouth separation device 300 to reach the outlet pipeline 130. When liquid extraction is required but liquid supplement is not, the input medium enters the multiphase mixing device 200 through the inlet pipeline 110, and is output through the intermediate pipeline 120, the mixed transportation pump 510, and the laughing mouth separation device 300 to reach the outlet pipeline 130. At the same time, the liquid extraction process is carried out synchronously. When liquid supplement is required but liquid extraction is not, the input medium directly enters the multiphase mixing device 200 through the inlet pipeline 110, and is output through the intermediate pipeline 120, the mixed transportation pump 510, and the laughing mouth separation device 300 to reach the outlet pipeline 130. At the same time, the liquid supplement process is carried out synchronously. When both liquid supplement and liquid extraction are required, the input medium directly enters the multiphase mixing device 200 through the inlet pipeline 110, and is output through the intermediate pipeline 120, the mixed transportation pump 510, and the laughing mouth separation device 300 to reach the outlet pipeline 130. At the same time, the liquid extraction and liquid supplement processes are carried out synchronously.

[0057] The gas-relieving and plug-unblocking device of the utility model can automatically separate the transported multiphase medium, automatically store the redundant liquid, ensure the stability of multiphase transportation directly through its own liquid circulation, no longer need to provide additional liquid from the outside for liquid supplement, nor need manual exhaust, and is green and environmentally friendly, with reduced energy consumption and lower cost. The whole device of the gas-relieving and plug-unblocking device of the utility model has a simple structure, is convenient for processing and maintenance, adopts a combination of front-end mixing (realized by the multiphase mixing device 200) and rear-end separation (realized by the laughing mouth separation device 300), and through a four-in-one transportation mode of normal incoming liquid transportation, incoming liquid storage, incoming liquid extraction, and liquid supplement transportation, realizes the normal and continuous transportation of the oil coming from the wellhead, can reduce costs, improve efficiency, and optimize the multiphase transportation process.

[0058] The above embodiments are only used to illustrate the technical solutions of the utility model and not to limit them. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the utility model can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the utility model, and they should all be covered by the scope of the claims of the utility model. The technologies, shapes, and structures not described in detail in the utility model are all well-known technologies.

Claims

1. A gas-clearing and plugging-removing device for mixed petroleum transportation, characterized in that: include: Pipeline, used for conveying multiphase media; A multiphase mixing device, installed on the pipeline, for liquid replenishment and mixing, the multiphase mixing device having an input interface, a liquid replenishment interface and an output interface; A splitter is installed on the pipeline. The splitter is installed on the pipeline connected to the output interface of the multiphase mixing device. The splitter is used to separate the gas and liquid of the multiphase medium. The splitter has an inlet, an outlet and a liquid extraction interface. A liquid storage tank, used to store liquid, wherein the liquid extraction interface is connected to the liquid inlet of the liquid storage tank through a pipeline, and the liquid outlet of the liquid storage tank is connected to the multiphase mixing device through a pipeline; Mixing pump, installed on the pipeline between the multiphase mixing device and the separation device; A pressure sensor is installed on a pipeline connected to an input interface of the multiphase mixing device; The flow sensor is installed on a pipe connected to the outlet of the smile separation device.

2. The gas-clearing and plugging-removing device for mixed petroleum transportation according to claim 1, characterized in that: The smile separation device comprises: The upper lip pipe is installed between the pipe inlet and the pipe outlet; The lower lip tube is installed in parallel with the upper lip tube between the inlet and outlet, the liquid taking interface is installed on the lower lip tube, the upper lip tube is bent into an arc in the direction away from the lower lip tube, and the lower lip tube is bent into an arc in the direction away from the upper lip tube.

3. The gas-clearing and blockage-removing device for mixed petroleum transportation according to claim 2, characterized in that: The curvature of the arc where the upper lip tube is located is smaller than the curvature of the arc where the lower lip tube is located.

4. The gas-clearing and blockage-removing device for mixed petroleum transportation according to claim 3, characterized in that: The inner diameter of the upper lip tube is smaller than the inner diameter of the lower lip tube.

5. The gas-clearing and plugging-removing device for mixed petroleum transportation according to claim 4, characterized in that: A first sewage valve is installed at the middle position of the lower lip pipe.

6. The gas-clearing and plugging-removing device for mixed petroleum transportation according to claim 1, characterized in that: The liquid storage tank comprises: A tank body, wherein a liquid level sensor is installed on the tank body, and the liquid level sensor is used to detect the liquid level inside the tank body; A liquid inlet, mounted on the tank body and connected to the interior of the tank body; A safety nozzle is located at the top of the tank body, and a safety valve is installed on the safety nozzle; A liquid outlet is installed on the tank body and communicated with the interior of the tank body, and the liquid outlet is connected to the liquid replenishment interface of the multiphase mixing device through a pipeline; The sewage outlet is located at the bottom of the tank body, and the sewage outlet is connected to a second sewage valve.

7. The gas-clearing and blockage-removing device for mixed petroleum transportation according to claim 6, characterized in that: A liquid replenishing pump is installed on the pipeline connecting the liquid storage tank and the multiphase mixing device.

8. The gas-clearing and blockage-removing device for mixed petroleum transportation according to claim 7, characterized in that: A one-way valve and an electric valve are installed on the pipeline connecting the liquid replenishing pump and the multiphase mixing device, and on the pipeline connecting the smile separation device and the liquid storage tank.

9. The gas-clearing and plugging-removing device for mixed petroleum transportation according to claim 7, characterized in that: The degassing and unblocking device also includes a base, and the liquid replenishing pump, the mixed delivery pump, and the liquid storage tank are all fixedly installed on the base.

10. The gas-clearing and plugging-removing device for mixed petroleum transportation according to claim 1, characterized in that: The multiphase mixing device comprises a rotating disk, the input interface, the liquid replenishing interface and the output interface are all welded on the rotating disk, and the input interface, the liquid replenishing interface and the output interface are all communicated with the interior of the rotating disk.

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