A gas field gas gathering multifunctional integrated device and a use method thereof

Abstract

The present application relates to natural gas exploitation technical field, specifically relates to a kind of gas field gas collection multifunctional integrated device and use method.The device includes by upper to lower sequentially arranged separator, buffer tank and skid;Buffer tank, separator are fixedly connected with skid;Vertical baffle is provided in the inside of separator, separator is divided into production separation cavity and venting separation cavity by baffle;The bottom of production separation cavity is connected by first connecting pipe Buffer tank;The upper portion of production separation cavity is equipped with second connecting pipe and third connecting pipe;Production separation cavity is fixedly provided with the separation chamber of bottom plate inclination;Second connecting pipe is connected to the higher side above bottom plate in vertical direction, lower side of bottom plate is connected to the lower part of production separation cavity by discharge pipe;Gas outlet is arranged in the upper portion of separation chamber side wall.The device can be transported as a whole, greatly reduce the construction cycle on site, and integrated design greatly reduces the pipeline connection node, thereby reducing the failure point.

Description

Technical Field

[0001] This invention relates to the field of natural gas extraction technology, specifically to a multi-functional integrated device for gas field gathering and its usage. Background Technology

[0002] Natural gas is a primary fuel in daily life, and the extracted natural gas typically needs to be transported over long distances through pipelines to reach households. The wellhead gas extracted from gas production sites usually undergoes processing steps such as desanding, gas-liquid separation, and water mist capture before it can be transported. Desanding the wellhead gas prevents sand particles from impacting and abrading the pipeline during transport, and gas-liquid separation and water mist capture prevent water droplets and mist from accumulating and forming liquid plugs, which could lead to pipeline pressure fluctuations, pipeline vibrations, or even pipe bursts.

[0003] In order to perform sand removal, gas-liquid separation, and water mist capture operations on wellhead gas, sand removal equipment, gas-liquid separation equipment, and demisting equipment are usually installed at natural gas stations. The wellhead gas is then passed through each device in sequence to achieve the purpose of "purification treatment". However, this conventional series-series split design usually requires separate transportation of each device, a large area required for on-site installation, many pipeline connection nodes between devices, and a long on-site installation and construction period. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-functional integrated device for gas field gas gathering and its usage method. By integrating functional components such as sand removal, gas-liquid separation, and water mist collection into a single skid, it can be transported as a whole, significantly reducing the on-site construction cycle. Furthermore, the integrated design greatly reduces pipeline connection nodes, thereby reducing potential failure points. It is particularly suitable for the initial production or commissioning stage of gas wells, used to ensure that gas wells can produce gas, monitor production capacity, and safely transport or vent gas.

[0005] This invention provides a multi-functional integrated gas gathering device for gas fields, comprising a skid, a separation tank, and a buffer tank. The buffer tank is located above the skid and fixedly connected to it, while the separation tank is located above the buffer tank and fixedly connected to it. A vertical partition is fixedly installed inside the separation tank, dividing the interior into a production separation chamber and a venting and liquid separation chamber. The bottom of the production separation chamber is connected to the buffer tank via a first connecting pipe, in which a valve is connected. A second connecting pipe for receiving wellhead gas and a third connecting pipe for outputting finished gas are provided at the upper part of the production separation chamber. An inertial separation assembly is installed within the production separation chamber, comprising a separation chamber fixedly connected to the separation tank. The bottom plate of the separation chamber is inclined. The second connecting pipe extends vertically through the top of the separation chamber to the upper part of the higher side of the bottom plate, and the lower side of the bottom plate is connected to the lower part of the production separation chamber via a discharge pipe. An outlet is provided on the upper part of the side wall of the separation chamber located on the lower side of the bottom plate.

[0006] Furthermore, an upward-opening slag collection hopper is provided inside the production separation chamber, the bottom of the slag collection hopper is connected to the first connecting pipe, and the end of the discharge pipe is located inside the slag collection hopper; several water-permeable holes are provided at the lower part of the slag collection hopper.

[0007] Furthermore, the integrated multi-functional gas gathering device for the gas field also includes a level gauge and a control terminal; the level gauge is connected to the production separation chamber and is used to monitor the liquid level inside the production separation chamber; the valve is an electrically controlled valve, and both the level gauge and the electrically controlled valve are electrically connected to the control terminal; the control terminal responds to the liquid level information output by the level gauge and controls the electrically controlled valve to open or close.

[0008] Furthermore, when the liquid level height indicated by the liquid level information is higher than a first preset height, the control terminal controls the solenoid valve to open; when the liquid level height indicated by the liquid level information is lower than a second preset height, the control terminal controls the solenoid valve to close; wherein, the first preset height is higher than the second preset height, and the second preset height is higher than the end of the discharge pipe.

[0009] Furthermore, a cyclone separation assembly is also provided in the production separation chamber. The cyclone separation assembly includes an inlet cylinder, a cyclone cone tube, and an outlet tube arranged coaxially. The upper end of the inlet cylinder is closed and fixedly connected to the separation tank. The large end of the cyclone cone tube faces upward and is fixedly connected to the lower end of the inlet cylinder. The upper end of the outlet tube is fixedly connected to the small end of the cyclone cone tube, and the lower end of the outlet tube is higher than the lower end of the discharge tube. An inlet tube is connected to the side wall of the inlet cylinder, and the axis of the inlet tube is tangent to the inner peripheral wall of the inlet cylinder. The air outlet is connected to the inner side of the inlet cylinder through the inlet tube.

[0010] Furthermore, the cyclone separation assembly also includes a rectifier cone and a rectifier column arranged coaxially; the rectifier column is located inside the inlet cylinder and the two are coaxial, and there is a gap between the rectifier column and the inlet cylinder; the upper end face of the rectifier column is fixedly connected to the inlet cylinder, and the bottom face of the rectifier cone faces upward and is fixedly connected to the lower end face of the rectifier column; the radius of the rectifier column is equal to the bottom radius of the rectifier cone, the taper of the rectifier cone and the cyclone cone tube is equal, and there is a gap between the rectifier cone and the cyclone cone tube.

[0011] Furthermore, a water mist collection assembly is also provided in the production separation chamber. The water mist collection assembly includes a mist-collecting cone and an air-distributing cone. The small end of the mist-collecting cone faces upward and is connected to the third connecting pipe. The mist-collecting cone is fixedly connected to the separation tank. The air-distributing cone and the mist-collecting cone are coaxial and have the same taper. The air-distributing cone is fixedly connected to the mist-collecting cone. The bottom surface of the air-distributing cone faces downward, and there is a gap between the mist-collecting cone and the air-distributing cone.

[0012] Furthermore, multiple first mist-catching rings are fixedly installed on the outer circumferential surface of the air-distributing cone. Each first mist-catching ring is spaced apart and has a gap between its end away from the air-distributing cone and the inner circumferential surface of the mist-catching cone tube. Multiple second mist-catching rings are fixedly installed on the inner circumferential surface of the mist-catching cone tube. Each second mist-catching ring is spaced apart and has a gap between its end away from the mist-catching cone tube and the outer circumferential surface of the air-distributing cone. The first mist-catching rings and the second mist-catching rings are staggered.

[0013] Optionally, a first mist-catching element is spirally wound around the outer circumferential surface of the air distribution cone, and a second mist-catching element is spirally wound around the inner circumferential surface of the mist-catching cone tube; there is a gap between the first mist-catching element and the inner circumferential wall of the mist-catching cone tube, and there is a gap between the second mist-catching element and the outer circumferential surface of the air distribution cone; the first mist-catching element and the second mist-catching element are staggered.

[0014] Furthermore, a fourth connecting pipe for receiving venting air and a fifth connecting pipe for outputting the venting air after separation to the flare are provided at the upper part of the venting and separating chamber; a plurality of first separating plates are vertically arranged inside the venting and separating chamber, the outer peripheral wall of the first separating plate is fixedly connected to the inner peripheral wall of the venting and separating chamber, and a first through hole is opened at the lower part of the first separating plate; a second separating plate is vertically arranged between any two adjacent first separating plates, the outer peripheral wall of the second separating plate is fixedly connected to the inner peripheral wall of the venting and separating chamber, and a second through hole is opened at the upper part of the second separating plate; each first separating plate and each second separating plate is located between the fourth connecting pipe and the fifth connecting pipe.

[0015] Furthermore, each of the two sides of the second separation plate has a vertically arranged drain branch pipe connected to its bottom, and the lower end of each drain branch pipe is connected through a connecting pipe; a horizontal drain main pipe is connected to the middle of one of the drain branch pipes, and the end of the drain main pipe away from the drain branch pipe extends downward into the interior of the buffer tank; and a vertical balance pipe is connected to the drain main pipe, and the end of the balance pipe away from the drain main pipe is connected to the upper part of the venting and separating chamber.

[0016] Furthermore, a filter plate is fixedly installed inside the buffer tank, and the filter plate is located at the lower part of the first connecting pipe; a slag discharge port is opened on the buffer tank, and the slag discharge port is located above the filter plate; a sealing cover is detachably connected to the slag discharge port, and the sealing cover can make the location of the slag discharge port airtight.

[0017] Furthermore, a flow meter is connected to the third connecting pipe.

[0018] Another aspect of the present invention provides a method for using a multi-functional integrated gas gathering device for a gas field. This method is based on the aforementioned multi-functional integrated gas gathering device for a gas field and includes: installing the multi-functional integrated gas gathering device for a gas field in a preset position; closing the valve and injecting water into the production separation chamber until the liquid level in the production separation chamber is higher than the end of the discharge pipe; connecting the wellhead gas to the second connecting pipe, so that the wellhead gas is separated and processed by the production separation chamber to obtain finished gas and output through the third connecting pipe.

[0019] Furthermore, when the liquid level in the production separation chamber is higher than the first preset height, the valve is opened to discharge the liquid and particulate impurities generated in the production separation chamber toward the buffer tank; until the liquid level in the production separation chamber is lower than the second preset height, the valve is closed to allow the liquid in the production separation chamber to continue to accumulate.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0021] 1. The present disclosure provides a multi-functional integrated device and method for gas gathering in a gas field. By setting the inertial separation component, the wellhead gas entering the separation chamber vertically can collide with the inclined bottom plate below. As a result, the particulate impurities contained in the wellhead gas lose kinetic energy due to the impact and fall down the bottom plate into the discharge pipe below and are discharged downwards. The larger droplets contained in the wellhead gas also flow down the bottom plate to the discharge pipe after impacting the bottom plate and are discharged downwards. The gas phase is discharged through the gas outlet and then output to the outside through the third pipe.

[0022] 2. The gas field gas gathering multifunctional integrated device and its usage method provided in this embodiment of the invention, through the set swirling separation component, enables the gas flow entering the inlet tube through the inlet pipe to be spirally transported downward and then output through the outlet pipe. As a result, small droplets and small particulate impurities contained in the gas from the outlet can be thrown towards the wall by centrifugal force during the spiral downward flow. Since the radial dimension of the swirling cone tube gradually decreases from top to bottom, the velocity of the gas flow along the tangential direction of the swirling cone tube can be increased, which correspondingly gives the small droplets and small particulate impurities a greater centrifugal force, thereby ensuring that they spiral downward and adhere tightly to the inner wall of the swirling cone tube. After these small droplets and small particulate impurities flow out from the outlet pipe, they will undergo a projectile motion. This projectile motion enables these small droplets and small particulate impurities to be scattered as far as possible, thereby preventing them from being re-entrained and carried out by the gas phase output from the outlet pipe.

[0023] 3. The gas field gas gathering multifunctional integrated device and usage method provided in this embodiment of the invention, by setting a water mist collection component, enables the airflow from the outlet pipe to come into contact with the first mist-collecting ring and the second mist-collecting ring multiple times (or to come into contact with the first mist-collecting element and the second mist-collecting element multiple times), thereby allowing the water mist carried in the airflow to be adhered and condensed into water droplets by the first mist-collecting ring and the second mist-collecting ring (or to come into contact with the first mist-collecting element and the second mist-collecting element multiple times), preventing it from being carried by the airflow and output from the third pipe, thus making the output finished gas drier;

[0024] 4. The gas field gas gathering multifunctional integrated device and its usage method provided in this disclosure integrates functional components such as inertial separation, cyclone separation, water mist capture, venting and liquid separation, and metering into a skid, which enables overall transportation, greatly reduces the on-site construction cycle, and the integrated design greatly reduces pipeline connection nodes, thereby reducing failure points. It is especially suitable for the initial production or commissioning stage of gas wells, and is used to ensure that gas wells can produce gas, monitor production capacity, and safely transport or vent gas. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 A three-dimensional structural schematic diagram of the integrated multi-functional gas gathering device for the gas field, as shown in the embodiment of the present invention;

[0027] Figure 2 According to Figure 1 A longitudinal sectional view of the integrated multi-functional gas gathering unit of the gas field;

[0028] Figure 3 According to Figure 2 A longitudinal sectional view of the production separation chamber;

[0029] Figure 4 According to Figure 1 A cross-sectional view of the production separation chamber;

[0030] Figure 5 A longitudinal sectional view of a water mist collection assembly drawn according to an embodiment of the present invention;

[0031] Figure 6 A three-dimensional structural schematic diagram of another water mist collection component according to an embodiment of the present invention;

[0032] Figure 7 This is a longitudinal sectional view of the venting and separating chamber drawn according to 2.

[0033] The attached diagram shows the markings and corresponding component names:

[0034] 1-Skirt; 2-Separation tank; 21-Baffle; 22-Production separation chamber; 23-Vacuum separation chamber; 3-Buffer tank; 41-First connecting pipe; 42-Second connecting pipe; 43-Third connecting pipe; 44-Fourth connecting pipe; 45-Fifth connecting pipe; 46-Drainage branch pipe; 47-Connecting pipe; 48-Drainage main pipe; 49-Balance pipe; 51-Separation chamber; 52-Bottom plate; 53-Discharge pipe; 54-Air outlet; 55-Slag hopper; 551-Water permeable hole; 61-Inlet cylinder; 6 2-Swirl cone tube; 63-Outlet pipe; 64-Inlet pipe; 65-Rectifying cone; 66-Rectifying column; 71-Mist catching cone tube; 72-Air distribution cone; 73-First mist catching ring; 74-Second mist catching ring; 75-First mist catching element; 76-Second mist catching element; 77-Guide pipe; 78-Connecting rod; 81-First separation plate; 82-First through hole; 83-Second separation plate; 84-Second through hole; 91-Filter plate; 92-Slag discharge port; 93-Sealing cover; 94-Pump liquid connection pipe. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are for illustrative purposes only and are not intended to limit the invention. It should be noted that this invention is already in the actual research and development stage.

[0036] Natural gas is a primary fuel in daily life, and the extracted gas typically needs to be transported over long distances through pipelines to reach households. The wellhead gas extracted from gas production sites usually undergoes processing steps such as desanding, gas-liquid separation, and water mist capture before it can be transported. Desanding the wellhead gas prevents sand particles from impacting and abrading the pipeline during transport, and gas-liquid separation and water mist capture prevent water droplets and mist from accumulating and forming liquid plugs during natural gas transport, which could lead to pipeline pressure fluctuations, pipeline vibrations, or even pipe bursts.

[0037] In order to perform sand removal, gas-liquid separation, and water mist capture operations on wellhead gas, sand removal equipment, gas-liquid separation equipment, and demisting equipment are usually installed at natural gas stations. The wellhead gas is then passed through each device in sequence to achieve the purpose of "purification treatment". However, this conventional series-series split design usually requires separate transportation of each device, a large area required for on-site installation, many pipeline connection nodes between devices, and a long on-site installation and construction period.

[0038] To address these issues, this invention provides a multi-functional integrated gas gathering device for gas fields, which at least partially overcomes the aforementioned technical problems. By integrating functional components such as sand removal, gas-liquid separation, water mist collection, and venting and liquid separation into a single skid, it enables overall transportation, significantly reducing the on-site construction cycle. Furthermore, the integrated design greatly reduces pipeline connection nodes, thereby reducing potential failure points. It is particularly suitable for the initial production or commissioning phase of gas wells, ensuring gas production, monitoring production capacity, and safe external transmission and / or venting.

[0039] Example 1:

[0040] like Figures 1 to 3 As shown, this embodiment provides a multi-functional integrated gas gathering device for gas fields, which includes a skid 1, a separation tank 2, and a buffer tank 3;

[0041] The buffer tank 3 is located above the skid 1 and is fixedly connected to the skid 1; the separation tank 2 is located above the buffer tank 3 and is fixedly connected to the skid 1.

[0042] A vertical partition 21 is fixedly installed inside the separation tank 2, which divides the interior of the separation tank 2 into a production separation chamber 22 and an emptying and separating chamber 23.

[0043] The bottom of the production separation chamber 22 is connected to the buffer tank 3 through a first connecting pipe 41, and a valve is connected in the first connecting pipe 41; a second connecting pipe 42 for receiving wellhead gas and a third connecting pipe 43 for outputting finished gas are provided at the upper part of the production separation chamber 22.

[0044] An inertial separation assembly is provided in the production separation chamber 22. The inertial separation assembly includes a separation chamber 51, which is fixedly connected to the separation tank 2. The bottom plate 52 of the separation chamber 51 is inclined. The second connecting pipe 42 is connected vertically through the top of the separation chamber 51 to the upper part of the higher side of the bottom plate 52. The lower side of the bottom plate 52 is connected to the lower part of the production separation chamber 22 through a discharge pipe 53. An air outlet 54 is provided on the upper part of the side wall of the separation chamber 51 located on the lower side of the bottom plate 52.

[0045] It should be understood that in this embodiment, the valve in the first connecting pipe 41 is normally closed, so the wellhead gas entering the production separation chamber 22 can only be output outward through the third connecting pipe 43.

[0046] Accordingly, the multi-functional integrated gas gathering device for gas fields provided in this embodiment, by setting the inertial separation component, enables the wellhead gas entering the separation chamber 51 vertically to collide with the inclined bottom plate 52 below. This causes particulate impurities in the wellhead gas to lose kinetic energy due to the impact and fall along the bottom plate 52 into the discharge pipe 53 below and be discharged downwards. Larger droplets in the wellhead gas also flow down the bottom plate 52 after impacting it and are discharged downwards along the discharge pipe 53. The gas phase is discharged through the gas outlet 54 and then output through the third connecting pipe 43. It should be understood that in the initial stage, there is no water at the bottom of the production separation chamber 22. At this time, some gas phase will flow out through the lower end of the discharge pipe 53, but as it floats upwards and is discharged through the third connecting pipe 43, it can also achieve separation from the liquid and solid phases, thus preventing particulate impurities and larger droplets from being carried into the subsequent transport pipeline. It is worth noting that the outlet 54 is located at a high position, which can minimize the flow of small droplets and particulate impurities with the gas phase through the outlet 54, thereby reducing the particulate impurities and moisture content of the produced gas.

[0047] Preferably, the gas field gas gathering multifunctional integrated device also includes a level gauge and a control terminal (neither of which are shown in the figure).

[0048] The level gauge is connected to the production separation chamber 22 and is used to monitor the liquid level inside the production separation chamber 22. The valve is an electrically controlled valve, and both the level gauge and the electrically controlled valve are electrically connected to the control terminal.

[0049] The control terminal responds to the liquid level information output by the liquid level gauge and controls the electronically controlled valve to open or close.

[0050] Specifically, when the liquid level height indicated by the liquid level information is higher than a first preset height, the control terminal controls the electronically controlled valve to open.

[0051] If the liquid level height indicated by the liquid level information is lower than the second preset height, the control terminal controls the electronically controlled valve to close.

[0052] Wherein, the first preset height is higher than the second preset height, and the second preset height is higher than the end of the discharge pipe 53.

[0053] It should be understood that the control terminal, level gauge, and solenoid valve are all commercially available products with mature technology. In this embodiment, it is only necessary that the level gauge can output level information representing the liquid level height in the production separation chamber 22 in the form of an electrical signal, the control terminal can determine whether the solenoid valve should be opened or closed based on the level information and output a control signal, and the solenoid valve can perform the opening or closing action according to the control signal sent by the control terminal. More specifically, the level gauge can be, for example, a differential pressure level gauge or a capacitive level gauge that outputs a level signal in the form of an electrical signal; the control terminal can be, for example, a PLC controller or an embedded level controller; and the solenoid valve can be, for example, an electric ball valve, an electric gate valve, or a solenoid valve.

[0054] Therefore, during the continuous operation of the multi-functional integrated gas gathering device in this gas field, the bottom of the production separation chamber 22 can always contain liquid at a level not lower than the second preset height (such as...). Figure 3 The lower dashed line indicates the position (the upper dashed line schematically shows the first preset height). This prevents the gas phase from being injected into the lower buffer tank 3 when the valve in the first connecting pipe 41 is opened to discharge the separated liquid phase and particulate impurities into the buffer tank 3. It should be understood that a pressure-balancing connecting pipe is also provided on the buffer tank 3. This connecting pipe is used to balance the pressure in the buffer tank 3 when the valve in the first connecting pipe 41 is opened, preventing the pressure in the buffer tank 3 from increasing and causing the liquid and gas phases in the production separation chamber 22 to be unable to discharge normally downwards through the first connecting pipe 41.

[0055] More preferably, an upward-opening slag collection hopper 55 is also provided in the production separation chamber 22, the bottom of the slag collection hopper 55 is connected to the first connecting pipe 41, and the end of the discharge pipe 53 is located inside the slag collection hopper 55.

[0056] Several water-permeable holes 551 are provided at the lower part of the slag collection hopper 55.

[0057] Therefore, the liquid phase and particulate impurities discharged downward from the discharge pipe 53 directly enter the inner side of the slag collection hopper 55. Thus, when the valve in the first pipe 41 is opened, the particulate impurities can be discharged first (the liquid phase is discharged along with the particulate impurities). This avoids the excessive accumulation of particulate impurities in the production separation chamber 22, thus avoiding the need to open the separation tank 2 to discharge slag (opening the separation tank 2 to discharge slag requires interrupting the treatment of wellhead gas, which is not conducive to continuous and safe production).

[0058] Preferably, a flow meter is connected to the third pipe 43.

[0059] Accordingly, the gas field gas gathering multi-functional integrated device provided in this embodiment can measure the finished gas output through the third pipe 43, thereby facilitating the monitoring of the wellhead production using this gas field gas gathering multi-functional integrated device. By continuously monitoring the changes in the flow data monitored by the flow meter, it can also be used to determine whether the device is operating normally.

[0060] More preferably, a filter plate 91 is fixedly installed inside the buffer tank 3, and the filter plate 91 is located at the lower part of the first connecting pipe 41;

[0061] A slag discharge port 92 is provided on the buffer tank 3, and the slag discharge port 92 is located above the filter plate 91;

[0062] A sealing cover 93 is detachably connected to the slag discharge port 92, and the sealing cover 93 can make the location of the slag discharge port 92 airtight.

[0063] A pumping connector 94 is connected to the lower part of the buffer tank 3. The pumping connector 94 is used to extract the liquid phase in the buffer tank 3. The pumping connector 94 is normally closed.

[0064] Therefore, the particulate impurities and liquid phase injected into the buffer tank 3 from the first pipe 41 are first filtered by the filter plate 91, so that the particulate impurities are retained above the filter plate 91, making it easier to process the separated liquid phase and particulate impurities separately.

[0065] Example 2:

[0066] like Figures 1 to 4 As shown, this embodiment is based on embodiment 1, the difference being that in this embodiment:

[0067] A cyclone separation assembly is also provided in the production separation chamber 22. The cyclone separation assembly includes an inlet tube 61, a cyclone cone tube 62 and an outlet tube 63 arranged coaxially.

[0068] The upper end of the inlet tube 61 is closed and fixedly connected to the separation tank 2. The large end of the vortex cone tube 62 faces upward and is fixedly connected to the lower end of the inlet tube 61. The upper end of the outlet tube 63 is fixedly connected to the small end of the vortex cone tube 62. The lower end of the outlet tube 63 is higher than the lower end of the discharge tube 53 (preferably, the lower end of the outlet tube 63 is higher than the first preset height, so that the lower end of the outlet tube 63 is always above the liquid level in the production separation chamber 22, which can ensure that the airflow flows out smoothly from the outlet tube 63).

[0069] An inlet pipe 64 is connected to the side wall of the inlet cylinder 61, and the axis of the inlet pipe 64 is tangent to the inner peripheral wall of the inlet cylinder 61; the air outlet 54 is connected to the inner side of the inlet cylinder 61 through the inlet pipe 64.

[0070] Accordingly, the gas field gas gathering multifunctional integrated device provided in this embodiment, by setting the above-mentioned swirling separation component, enables the gas flow entering the inlet cylinder 61 through the inlet pipe 64 to be spirally transported downward and then output through the outlet pipe 63. As a result, the small droplets and small particulate impurities contained in the gas from the outlet 54 can be thrown towards the wall by centrifugal force during the spiral downward flow. Since the radial dimension of the swirling cone tube 62 gradually decreases from top to bottom, the velocity of the gas flow along the tangential direction of the swirling cone tube 62 can be increased, which correspondingly gives the small droplets and small particulate impurities a greater centrifugal force, thereby ensuring that they spiral downward and adhere tightly to the inner wall of the swirling cone tube 62. After these small droplets and small particulate impurities flow out from the outlet pipe 63, they will undergo a projectile motion (similar to the situation where water droplets are thrown out when rotating an umbrella). This projectile motion enables these small droplets and small particulate impurities to fall as far as possible, thereby preventing them from being re-entrained and carried out by the gas phase output from the outlet pipe 63.

[0071] More preferably, the cyclone separation assembly further includes a rectifier cone 65 and a rectifier column 66 arranged coaxially;

[0072] The rectifier column 66 is located inside the inlet cylinder 61 and the two are coaxial, and there is a gap between the rectifier column 66 and the inlet cylinder 61; the upper end face of the rectifier column 66 is fixedly connected to the inlet cylinder 61, and the bottom surface of the rectifier cone 65 faces upward and is fixedly connected to the lower end face of the rectifier column 66.

[0073] The radius of the rectifier column 66 is equal to the bottom radius of the rectifier cone 65, the taper of the rectifier cone 65 and the vortex cone tube 62 are equal, and there is a gap between the rectifier cone 65 and the vortex cone tube 62.

[0074] Accordingly, the gas field gas gathering multifunctional integrated device provided in this embodiment, by setting up a rectifier column 66 and a rectifier cone 65, and utilizing them to occupy the central area of ​​the inlet cylinder 61 and the swirling cone tube 62, can prevent the gas phase from the outlet 54 from being forced to flow downward spirally along the annular channel (i.e., the gap between the inlet cylinder 61 and the rectifier column 66, and between the swirling cone tube 62 and the rectifier cone 65) when passing through the inlet cylinder 61 and the swirling cone tube 62. This avoids axial backflow in the central area of ​​the inlet cylinder 61 and the swirling cone tube 62 from disturbing the airflow direction, and ensures the separation effect of the swirling separation component.

[0075] Example 3:

[0076] like Figures 1 to 6 As shown, this embodiment is based on embodiment 2, the difference being that in this embodiment:

[0077] A water mist collection assembly is also provided in the production separation chamber 22, which includes a mist collection cone 71 and an air distribution cone 72.

[0078] The small end of the mist-catching cone 71 faces upward and is connected to the third connecting pipe 43. The mist-catching cone 71 is fixedly connected to the separation tank 2.

[0079] The air distribution cone 72 and the mist-catching cone tube 71 are coaxial and have the same taper. The air distribution cone 72 is fixedly connected to the mist-catching cone tube 71 (for example, the air distribution cone 72 is fixedly connected to the mist-catching cone tube 71 through a connecting rod 78). The bottom surface of the air distribution cone 72 faces downward, and there is a gap between the mist-catching cone tube 71 and the air distribution cone 72.

[0080] Specifically, such as Figure 5 As shown, multiple first fog-catching rings 73 are fixedly installed on the outer peripheral surface of the air distribution cone 72. Each first fog-catching ring 73 is spaced apart and there is a gap between the end away from the air distribution cone 72 and the inner peripheral surface of the fog-catching cone tube 71.

[0081] Multiple second fog-catching rings 74 are fixedly installed on the inner circumferential surface of the fog-catching cone tube 71. Each second fog-catching ring 74 is spaced apart and there is a gap between the end away from the fog-catching cone tube 71 and the outer circumferential surface of the air distribution cone 72.

[0082] The first fog-catching ring 73 and the second fog-catching ring 74 are arranged alternately.

[0083] Therefore, the multi-functional integrated gas gathering device for gas fields provided in this embodiment, by alternately arranging the first mist-catching ring 73 and the second mist-catching ring 74 in the gap between the mist-catching cone 71 and the gas distribution cone 72, allows the airflow from the outlet pipe 63 to come into contact with the first mist-catching ring 73 and the second mist-catching ring 74 multiple times. This allows the water mist carried in the airflow to be adhered to and condensed into water droplets by the first mist-catching ring 73 and the second mist-catching ring 74 as much as possible, preventing it from being carried by the airflow and output from the third pipe 43, thus making the output finished gas drier. Obviously, to facilitate the outflow of water droplets collected on each of the first mist-catching rings 73, drill holes (not shown in the figure) can be provided at the bottom of each of the first mist-catching rings 73 for draining the collected water.

[0084] Optionally, such as Figure 6 As shown, in another specific practice of this embodiment, a first mist-catching element 75 is spirally wound around the outer circumferential surface of the air distribution cone 72, and a second mist-catching element 76 is spirally wound around the inner circumferential surface of the mist-catching cone tube 71.

[0085] There is a gap between the first mist-catching element 75 and the inner peripheral wall of the mist-catching cone tube 71, and there is a gap between the second mist-catching element 76 and the outer peripheral surface of the air-distributing cone 72;

[0086] The first fog-catching element 75 and the second fog-catching element 76 are arranged alternately.

[0087] Compared to the aforementioned method of alternately arranging the first mist-catching ring 73 and the second mist-catching ring 74 in the gap between the mist-catching cone 71 and the air-distributing cone 72, in this embodiment, the first mist-catching element 75 and the second mist-catching element 76 are both integral spiral structures. As a result, the water droplets that gather on the first mist-catching element 75 can flow directly out along the spiral path at the root of the first mist-catching element 75 without the need to specially drill holes to drain the gathered water.

[0088] Preferably, such as Figure 5 , Figure 6 As shown, a guide pipe 77 extends downward from the large end of the mist-collecting cone 71, and the guide pipe 77 can be used to guide the gas phase inflow. Similarly, the lower end of the guide pipe 77 is higher than the first preset height, so that the lower end of the guide pipe 77 is always above the liquid level in the production separation chamber 22, which can ensure that the gas flow smoothly enters the gap between the mist-collecting cone 71 and the gas distribution cone 72.

[0089] Example 4:

[0090] like Figure 1 , Figure 2 As shown in Figure 7, this embodiment is based on Embodiment 1, with the difference being that in this embodiment:

[0091] The upper part of the venting and separating chamber 23 is provided with a fourth connecting pipe 44 for receiving venting air and a fifth connecting pipe 45 for outputting the separated venting air to the torch.

[0092] A plurality of first separation plates 81 are vertically arranged inside the venting and separating chamber 23. The outer peripheral wall of the first separation plate 81 is fixedly connected to the inner peripheral wall of the venting and separating chamber 23. A first through hole 82 is provided at the lower part of the first separation plate 81.

[0093] A second separation plate 83 is vertically arranged between any two adjacent first separation plates 81. The outer peripheral wall of the second separation plate 83 is fixedly connected to the inner peripheral wall of the venting and separating chamber 23. A second through hole 84 is provided on the upper part of the second separation plate 83.

[0094] Each of the first separation plates 81 and each of the second separation plates 83 are located between the fourth connector 44 and the fifth connector 45.

[0095] Accordingly, the gas field gas gathering multifunctional integrated device provided in this embodiment, by setting a first separation plate 81 and a second separation plate 83, enables the venting air entering the venting and liquid separation chamber 23 through the fourth pipe 44 to "circle" multiple times between the first separation plate 81 and the second separation plate 83, thereby separating the liquid droplets contained in the venting air. This avoids unstable combustion such as flame flashing, detonation or flame splashing when the venting air is delivered to the flare for combustion and emission due to liquid content, ensuring the safety and environmental protection of flare ignition and emission.

[0096] Specifically, each of the two sides of the second separation plate 83 has a vertically arranged drain branch pipe 46 connected to its bottom, and the lower end of each drain branch pipe 46 is connected through a connecting pipe 47; a horizontal drain main pipe 48 is connected to the middle of one of the drain branch pipes 46, and the end of the drain main pipe 48 away from the drain branch pipe 46 extends downward into the interior of the buffer tank 3; and a vertical balance pipe 49 is connected to the drain main pipe 48, and the end of the balance pipe 49 away from the drain main pipe 48 is connected to the upper part of the venting and separating chamber 23.

[0097] Therefore, the venting air entering the venting and separating chamber 23 via the fourth connector 44 "circles" multiple times between the first separating plates 81 and the second separating plates 83. During this "circling," the liquid phase generated by contact with the first separating plates 81 and the second separating plates 83 accumulates at the bottom of the venting and separating chamber 23 on both sides of the second separating plates 83. By connecting drain branch pipes 46 to the bottom of the venting and separating chamber 23 on both sides of the second separating plates 83, these liquid phases can be discharged in a timely manner. By setting up a balance pipe 49, the air pressure between the venting and separating chamber 23 and the buffer tank 3 can be balanced, thereby ensuring that the liquid phase in the venting and separating chamber 23 flows smoothly into the buffer tank 3 through the drain main pipe 48. Obviously, once liquid is generated in the venting and separating chamber 23, it will immediately flow into the lower drain branch pipe 46. The drain main pipe 48 is connected to the middle of the drain branch pipe 46, so liquid will be stored in the middle of the drain branch pipe 46 and in the connecting pipe 47. The liquid storage position is higher than the drain branch pipe 46, which is where the liquid is discharged into the buffer tank 3. This liquid storage can act as a liquid seal, thereby preventing the venting air from the fourth connecting pipe 44 from directly reaching the fifth connecting pipe 45 through the drain branch pipe 46 and the connecting pipe 47, ensuring the separation capability of the venting and separating chamber 23 (venting air is usually at a low pressure and is not enough to push the liquid storage of the liquid seal, and it has a "bypass" path with less resistance). Moreover, because a balance pipe 49 is provided, the liquid storage will not be sucked dry by the siphon phenomenon when the drain main pipe 48 discharges liquid, and this liquid seal capability can always be maintained. Obviously, before the gas field gas gathering multi-functional integrated device provided in this embodiment is used for venting and liquid separation for the first time, liquid should be injected into the drain branch pipe 46 until the connecting pipe 47 is full of liquid.

[0098] It is worth noting that the balance pipe 49 provided in this embodiment can replace the aforementioned "a pipe for balancing gas pressure is also provided on the buffer tank 3". That is, when the production separation chamber 22 is drained, the balance pipe 49 can be directly used to balance the pressure of the buffer tank 3, and the excess gas in the buffer tank 3 is introduced into the venting separation chamber 23 through the balance pipe 49.

[0099] Example 5:

[0100] This embodiment provides a method for using a multi-functional integrated gas gathering device for gas fields. This method, based on the aforementioned multi-functional integrated gas gathering device for gas fields, includes:

[0101] Install the gas field gas gathering multi-functional integrated device at the preset position;

[0102] Close the valve and inject water into the production separation chamber 22 until the liquid level in the production separation chamber 22 is higher than the end of the discharge pipe 53;

[0103] Wellhead gas is connected to the second connector 42, so that the wellhead gas is separated and processed by the production separation chamber 22 to obtain finished gas, which is then output through the third connector 43.

[0104] This ensures that the well gas entering the separation chamber 51 flows out through the gas outlet 54 first, thereby improving the separation effect.

[0105] When the liquid level in the production separation chamber 22 is higher than the first preset height, the valve is opened to discharge the liquid and particulate impurities generated in the production separation chamber 22 toward the buffer tank 3.

[0106] The valve is closed until the liquid level in the production separation chamber 22 is lower than the second preset height, allowing the liquid in the production separation chamber 22 to continue to accumulate.

[0107] Therefore, by maintaining the liquid level between the first preset height and the second preset height in the production separation chamber 22, it is possible to prevent wellhead gas from entering the buffer tank 3 below during the process of draining liquid through the first pipe 41, which helps to prevent wellhead gas leakage when the buffer tank 3 discharges slag or water.

[0108] Obviously, the slag discharge or drainage of buffer tank 3 should be selected during the operation interval of the venting and separating chamber 23 to avoid air leakage.

[0109] Obviously, in this application, the top of the separation chamber 51 and the separation tank 2 assembly are airtightly connected. The gas entering the separation chamber 51 can only flow out through the outlet 54 and the lower end of the discharge pipe 53. Similarly, the airflow entering the cyclone separation assembly through the inlet pipe 64 can only flow out through the outlet pipe 63. The airflow entering the production separation chamber 22 can only enter the third pipe 43 and be output through the gap between the mist-catching cone pipe 71 and the air-distributing cone 72.

[0110] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-functional integrated device for gas gathering in a gas field, characterized in that, include: Skid (1), separation tank (2) and buffer tank (3); The buffer tank (3) is located above the skid (1) and is fixedly connected to the skid (1); the separation tank (2) is located above the buffer tank (3) and is fixedly connected to the skid (1). A vertical partition (21) is fixedly installed inside the separation tank (2), which divides the interior of the separation tank (2) into a production separation chamber (22) and an emptying separation chamber (23). The bottom of the production separation chamber (22) is connected to the buffer tank (3) through a first pipe (41), and a valve is connected in the first pipe (41); a second pipe (42) for receiving well gas and a third pipe (43) for outputting finished gas are provided at the upper part of the production separation chamber (22). An inertial separation assembly is provided in the production separation chamber (22). The inertial separation assembly includes a separation chamber (51) which is fixedly connected to the separation tank (2). The bottom plate (52) of the separation chamber (51) is inclined. The second connecting pipe (42) is connected vertically through the top of the separation chamber (51) to the upper part of the higher side of the bottom plate (52). The lower side of the bottom plate (52) is connected to the lower part of the production separation chamber (22) through a discharge pipe (53). An air outlet (54) is provided on the upper part of the side wall of the separation chamber (51) located on the lower side of the bottom plate (52). A cyclone separation assembly is also provided in the production separation chamber (22), which includes an inlet tube (61), a cyclone cone tube (62), and an outlet tube (63) arranged coaxially. The upper end of the inlet tube (61) is closed and fixedly connected to the separation tank (2), the large end of the vortex cone tube (62) faces upward and is fixedly connected to the lower end of the inlet tube (61), the upper end of the outlet tube (63) is fixedly connected to the small end of the vortex cone tube (62), and the lower end of the outlet tube (63) is higher than the lower end of the discharge tube (53). An inlet pipe (64) is connected to the side wall of the inlet cylinder (61), and the axis of the inlet pipe (64) is tangent to the inner peripheral wall of the inlet cylinder (61); the air outlet (54) is connected to the inside of the inlet cylinder (61) through the inlet pipe (64). A water mist collection assembly is also provided in the production separation chamber (22), which includes a mist collection cone (71) and an air distribution cone (72). The small end of the mist-catching cone (71) faces upward and is connected to the third connecting pipe (43). The mist-catching cone (71) is fixedly connected to the separation tank (2). The air distribution cone (72) and the mist-catching cone tube (71) are coaxial and have the same taper. The air distribution cone (72) is fixedly connected to the mist-catching cone tube (71). The bottom surface of the air distribution cone (72) faces downward. There is a gap between the mist-catching cone tube (71) and the air distribution cone (72). The upper part of the venting and separating chamber (23) is provided with a fourth connecting pipe (44) for receiving venting air and a fifth connecting pipe (45) for outputting the venting air after separation to the torch. Multiple first separation plates (81) are vertically arranged inside the venting and separating chamber (23). The outer peripheral wall of the first separation plate (81) is fixedly connected to the inner peripheral wall of the venting and separating chamber (23). A first through hole (82) is provided at the lower part of the first separation plate (81). A second separation plate (83) is vertically arranged between any two adjacent first separation plates (81). The outer peripheral wall of the second separation plate (83) is fixedly connected to the inner peripheral wall of the venting and separating chamber (23). A second through hole (84) is opened on the upper part of the second separation plate (83). Each of the first separation plates (81) and each of the second separation plates (83) are located between the fourth connector (44) and the fifth connector (45).

2. The integrated multi-functional gas gathering device for gas fields according to claim 1, characterized in that: A slag collection hopper (55) with an upward opening is also provided in the production separation chamber (22). The bottom of the slag collection hopper (55) is connected to the first connecting pipe (41), and the end of the discharge pipe (53) is located inside the slag collection hopper (55). Several water-permeable holes (551) are provided at the lower part of the slag collection hopper (55).

3. The integrated multi-functional gas gathering device for gas fields according to claim 1, characterized in that: It also includes level gauges and control terminals; The level gauge is connected to the production separation chamber (22) and is used to monitor the liquid level inside the production separation chamber (22). The valve is an electrically controlled valve. The level gauge and the electrically controlled valve are both electrically connected to the control terminal. The control terminal responds to the liquid level information output by the liquid level gauge and controls the electronically controlled valve to open or close.

4. The integrated multi-functional gas gathering device for gas fields according to claim 3, characterized in that: When the liquid level height indicated by the liquid level information is higher than a first preset height, the control terminal controls the electronically controlled valve to open; If the liquid level height indicated by the liquid level information is lower than the second preset height, the control terminal controls the electronically controlled valve to close. The first preset height is higher than the second preset height, and the second preset height is higher than the end of the discharge pipe (53).

5. The integrated multi-functional gas gathering device for gas fields according to claim 1, characterized in that: The cyclone separation assembly also includes a rectifier cone (65) and a rectifier column (66) arranged coaxially. The rectifier column (66) is located inside the inlet cylinder (61) and the two are coaxial. There is a gap between the rectifier column (66) and the inlet cylinder (61). The upper end face of the rectifier column (66) is fixedly connected to the inlet cylinder (61), and the bottom surface of the rectifier cone (65) faces upward and is fixedly connected to the lower end face of the rectifier column (66). The radius of the rectifier column (66) is equal to the bottom radius of the rectifier cone (65), the taper of the rectifier cone (65) and the vortex cone tube (62) are equal, and there is a gap between the rectifier cone (65) and the vortex cone tube (62).

6. The integrated multi-functional gas gathering device for gas fields according to claim 1, characterized in that: Multiple first fog-catching rings (73) are fixedly installed on the outer peripheral surface of the air distribution cone (72). Each first fog-catching ring (73) is spaced apart and there is a gap between the end away from the air distribution cone (72) and the inner peripheral surface of the fog-catching cone tube (71). Multiple second fog-catching rings (74) are fixedly installed on the inner circumferential surface of the fog-catching cone (71). Each second fog-catching ring (74) is spaced apart and there is a gap between the end away from the fog-catching cone (71) and the outer circumferential surface of the air-distributing cone (72). The first fog-catching ring (73) and the second fog-catching ring (74) are arranged alternately.

7. The integrated multi-functional gas gathering device for gas fields according to claim 1, characterized in that: A first mist-catching element (75) is spirally wound around the outer circumference of the air-distributing cone (72), and a second mist-catching element (76) is spirally wound around the inner circumference of the mist-catching cone tube (71). There is a gap between the inner peripheral wall of the first mist-catching element (75) and the mist-catching cone (71), and there is a gap between the outer peripheral surface of the second mist-catching element (76) and the air-distributing cone (72); The first fog-catching element (75) and the second fog-catching element (76) are arranged alternately.

8. The integrated multi-functional gas gathering device for gas fields according to claim 1, characterized in that: Each of the two sides of the second separation plate (83) has a vertically arranged drain branch pipe (46) connected to the bottom of the venting and separating chamber (23). The lower end of each drain branch pipe (46) is connected through a connecting pipe (47). A horizontal drain main pipe (48) is connected to the middle of one of the drain branch pipes (46). The end of the drain main pipe (48) away from the drain branch pipe (46) extends downward into the buffer tank (3). A vertical balance pipe (49) is connected to the drain main pipe (48). The end of the balance pipe (49) away from the drain main pipe (48) is connected to the upper part of the venting and separating chamber (23).

9. The integrated multi-functional gas gathering device for gas fields according to claim 1, characterized in that: A filter plate (91) is fixedly installed inside the buffer tank (3), and the filter plate (91) is located at the lower part of the first connecting pipe (41); A slag discharge port (92) is provided on the buffer tank (3), and the slag discharge port (92) is located above the filter plate (91); A sealing cover (93) is detachably connected to the slag discharge port (92), and the sealing cover (93) can make the location of the slag discharge port (92) airtight.

10. The integrated multi-functional gas gathering device for gas fields according to claim 1, characterized in that: A flow meter is connected to the third pipe (43).

11. A method of using a multi-functional integrated gas gathering device for a gas field, based on the multi-functional integrated gas gathering device for a gas field as described in any one of claims 4 to 7, characterized in that: include: Install the gas field gas gathering multi-functional integrated device at the preset position; Close the valve and inject water into the production separation chamber (22) until the liquid level in the production separation chamber (22) is higher than the end of the discharge pipe (53); Wellhead gas is connected to the second connector (42), so that the wellhead gas is separated and processed by the production separation chamber (22) to obtain finished gas and output through the third connector (43).

12. The method of use according to claim 11, characterized in that: When the liquid level in the production separation chamber (22) is higher than the first preset height, the valve is opened so that the liquid and particulate impurities generated in the production separation chamber (22) are discharged toward the buffer tank (3); The valve is closed until the liquid level in the production separation chamber (22) is lower than the second preset height, allowing the liquid in the production separation chamber (22) to continue to accumulate.

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