Multi-wellsite gas production and gathering process package

Abstract

This invention relates to the field of oil and gas gathering and transportation technology, and particularly to a multi-well gas gathering and transportation process package, including a wellhead valve assembly skid, which comprises several valve assembly skid modules. Each valve assembly skid module includes a distribution pipeline, one end of which is connected to the wellhead, and the other end of which is connected in parallel to a wellhead valve assembly separation pipeline and a wellhead valve assembly metering pipeline; a water jacket heater skid, one path of which is connected to the wellhead valve assembly separation pipeline, and the other path of which is connected to the wellhead valve assembly metering pipeline; a multi-well metering skid, which is connected to the outlet of the water jacket heater skid; the outlet of the multi-well metering skid is connected to the outlet valve assembly module; and a venting and liquid separation skid, which is connected to the drain outlet of the multi-well metering skid. This process package adopts a skid-mounted design, integrating multiple surface processes onto several skids to form an integrated and compact equipment form, reducing interfaces and connectors between equipment, and lowering production risks and investment costs.

Description

Technical Field

[0001] This invention relates to the field of oil and gas gathering and transportation technology, and in particular to a multi-well gas gathering and transportation process package. Background Technology

[0002] With the continued development of gas fields, especially the promotion of multi-well production technology on the same platform, gathering and transportation processes have faced new challenges, requiring them to be more efficient, safer, and more environmentally friendly. As the system responsible for collecting and transporting resources such as crude oil or natural gas extracted from gas fields, the level of its technology directly determines the development success of the gas field and is also closely related to the economic and social benefits of the enterprise.

[0003] The surface gathering and transportation process for gas wells is generally consistent. Wellhead product is throttled by a cage-type throttle valve at the wellhead, then enters a water-jacketed heater for throttling and heating. After oil-gas-water separation and dehydration in the separator, it is metered by a metering unit and finally transported to the downstream pipeline network. In current gathering and transportation processes, the heating, throttling, separation, venting, and metering systems for a single gas well are often independently set up. However, when there are multiple gas wells in the same area, each well needs its own identical surface gathering and transportation system. For large-scale gas fields, this individual configuration not only leads to the installation of a large number of gathering and transportation equipment and pipelines, significantly increasing equipment and land use investment costs, but also brings many inconveniences in management.

[0004] Current domestic research largely focuses on the modification of individual gas well gathering and transportation equipment. For example, the article "Application of Shale Gas Well Site Processes and Skid-Mounted Devices" in the 8th issue of *Chemical Engineering Design Communications* in 2018 details a skid-mounted integrated device suitable for single-well stations, taking the optimization of shale gas surface gathering and transportation processes as an example. While this device allows for flexible resource allocation between single-well stations, reduces investment, and adapts to the declining production capacity and rolling development model of shale gas, it can also affect the selection and customization of equipment within the station if the gas field manages too many wells. This impacts the commissioning time of new stations, makes the corresponding process more complex, and increases investment budgets. A review of similar studies reveals that they often overlook the potential for integrated design between multiple gas wells and fail to propose a device solution that simplifies the process and saves costs. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing gathering and transportation processes that require separate surface gathering and transportation systems for multiple gas wells in the same area, which are complex and greatly increase the investment costs of equipment and land use. This invention provides a multi-well gas gathering and transportation process package.

[0006] In a first aspect, the present invention provides a multi-well site gas production and gathering process package, including a wellhead valve assembly skid, the wellhead valve assembly skid comprising several valve assembly skid modules, each valve assembly skid module comprising a distribution pipeline, one end of which is connected to the wellhead, and the other end of which is connected in parallel to a wellhead valve assembly separation pipeline and a wellhead valve assembly metering pipeline; a water jacket heating furnace skid, one path of which is connected to the wellhead valve assembly separation pipeline, and the other path of which is connected to the wellhead valve assembly metering pipeline; a multi-well site metering skid, the multi-well site metering skid being connected to the outlet of the water jacket heating furnace skid; the multi-well site metering skid being used to meter the gas production and / or liquid production of one or more well sites; the outlet of the multi-well site metering skid being connected to an outlet valve assembly module; and a venting and liquid separation skid, the venting and liquid separation skid being connected to the drain outlet of the multi-well site metering skid.

[0007] The multi-well gas production and gathering process package provided by this invention integrates several valve group skid modules into a wellhead valve group skid. The wellheads of oil and gas wells are connected in parallel to the wellhead valve group separation pipeline and the wellhead valve group metering pipeline via distribution pipelines. Metering and separation operations for a single oil and gas well can be performed independently without interrupting the entire system, greatly improving operational efficiency and flexibility. When a new well station needs to be added to the system, there is no need to configure a new surface gathering and transportation system; simply connect the newly added well station to the valve group skid module, saving production costs and improving production efficiency. Simultaneously, the independence and redundancy of the several valve group skid modules also facilitate fault isolation, reducing overall downtime caused by localized failures, making subsequent maintenance more convenient and reducing downtime risks. The multi-well gas production and gathering process package provided by this invention enables precise metering of gas and liquid production from one or more well stations, avoiding the traditional practice of configuring the same surface gathering and transportation system for each gas well. This ensures efficient external transmission performance after simultaneous separation and metering of multiple well stations, effectively improving the overall operating efficiency of the gathering and transportation system.

[0008] The multi-well gas gathering and transportation process package provided by this invention adopts a skid-mounted design, integrating surface processes such as separation, metering, wastewater treatment, venting, and valve switching onto multiple skids, forming an integrated and compact equipment form. The compact layout helps to reduce pipeline length and the number of bends, reduce fluid resistance, and improve system efficiency. The integrated design reduces the interfaces and connectors between equipment, thereby reducing production risks and investment costs.

[0009] Preferably, it also includes a venting flare, which is connected to the venting and separating skid, and the venting and separating skid is connected to the wellhead valve assembly skid, the water jacket heating furnace skid, the multi-well metering skid, and the outlet valve assembly module.

[0010] Connecting the vent flare to the venting separator skid, which in turn connects to the wellhead valve assembly skid, water jacket heater skid, multi-well metering skid, and outlet valve assembly module, allows for centralized treatment of excess or abnormal gases that may be generated in each process step. When gas venting is required due to process fluctuations or pressure anomalies within the system, the waste gas can be uniformly introduced into the vent flare for combustion treatment, effectively preventing the direct emission of harmful and flammable gases into the environment and reducing safety risks.

[0011] Preferably, the water jacket heating furnace skid includes a water jacket heating furnace separation pipeline and a water jacket heating furnace metering pipeline. The wellhead valve group separation pipeline is connected to the water jacket heating furnace separation pipeline via a first pipeline. A first and second stage throttling valve is installed at the connection between the first pipeline and the wellhead valve group separation pipeline. The first pipeline is connected to the venting and liquid separating skid via a first venting pipeline. The water jacket heating furnace separation pipeline is equipped with a first and third stage throttling valve. The wellhead valve group metering pipeline is connected to the water jacket heating furnace metering pipeline via a second pipeline. A second and second stage throttling valve is installed at the connection between the second pipeline and the wellhead valve group metering pipeline. The second pipeline is connected to the venting and liquid separating skid via a second venting pipeline. The water jacket heating furnace metering pipeline is equipped with a second and third stage throttling valve. The water jacket heating furnace separation pipeline and the water jacket heating furnace metering pipeline are connected to the multi-well location metering skid.

[0012] First-stage and second-stage throttling valves are installed at the connections of the first and second pipelines to the wellhead valve group, respectively, to regulate the fluid entering the water jacket heating furnace system, ensuring a stable inlet flow rate and avoiding negative impacts on subsequent processes (such as heating, separation, and metering) due to sudden flow changes. First-stage and second-stage throttling valves are installed in the separation and metering pipelines of the water jacket heating furnace, respectively, to achieve further fine control of the heated fluid, ensuring that the temperature, pressure, and flow rate reach the optimal process conditions, which is beneficial to the stable operation of the entire system.

[0013] The first and second pipelines are connected to the venting separator skid via the first and second venting pipelines, respectively. This allows excess or abnormal fluid to be discharged in a timely manner when the system pressure is too high or the flow rate is abnormal, preventing system overload or impact and ensuring safe operation of the equipment.

[0014] Preheating the fluid within the system using a water-jacketed heating furnace skid reduces fluid viscosity, facilitating more thorough separation of the oil, gas, and water phases. This ensures more stable and accurate downstream metering data. The design connects the water-jacketed heating furnace separation pipeline to the corresponding wellhead valve group separation pipeline, and the water-jacketed heating furnace metering pipeline to the corresponding wellhead valve group metering pipeline. This ensures that the separation and metering processes within the overall system do not interfere with each other, allowing for independent metering and separation operations at each well location during multi-well gathering and transportation, thus improving overall operational efficiency.

[0015] Preferably, the multi-well metering skid includes a metering tank and a separating tank, with the metering tank located above the separating tank. The inlet of the metering tank is connected to the metering pipeline of the water jacket heater, and the outlet of the metering tank is connected to the metering pipeline of the multi-well metering skid. A first flow meter and a second flow meter are installed on the metering pipeline of the multi-well metering skid, and the metering pipeline of the multi-well metering skid is connected to the outlet valve group module. The inlet of the separating tank is connected to the separating pipeline of the water jacket heater, and the outlet of the separating tank is connected to the separating pipeline of the multi-well metering skid. The separating pipeline of the multi-well metering skid is incorporated into the metering pipeline of the multi-well metering skid, and the connection between the separating pipeline of the multi-well metering skid and the metering pipeline of the multi-well metering skid is located between the first flow meter and the second flow meter. The metering tank is connected to the separating tank through a first drain pipeline, and the separating tank is connected to the venting and separating skid through a second drain pipeline.

[0016] The multi-well gas gathering and transportation process package provided by this invention features a multi-well metering skid with a layered design. The metering tank is located at the top, primarily receiving fluid pre-treated by the water-jacketed heater metering pipeline, thus ensuring fluid stability and facilitating accurate metering. The lower separation tank receives fluid from the water-jacketed heater separation pipeline and wastewater flowing in from the first sewage pipeline, which facilitates more thorough oil-gas-water separation using gravity. A first flow meter is installed on the metering pipeline at the metering tank outlet, enabling real-time monitoring of the main fluid from the metering tank to ensure accurate and reliable data.

[0017] The separated flow and the main metering flow are processed separately. The separated tank introduces the processed fluid through the separation pipeline and merges it with the main metering pipeline after the first flow meter. This setting ensures that the data to be measured is not affected by the fluid on the separated side. Finally, the flow rate after merging is measured by the second flow meter, which improves the accuracy and flexibility of the measurement.

[0018] The metering tank and the separation tank are connected by a first drain line to transfer internal contaminants. Simultaneously, the separation tank is connected to a venting skid via a second drain line, forming a tiered drainage system. This not only promptly removes accumulated impurities and contaminants from the system but also maintains the cleanliness of the equipment's interior, ensuring long-term stable operation.

[0019] This multi-well metering skid integrates metering, separation, and sewage discharge functions into a single skid, reducing the number of on-site pipelines and interfaces, lowering installation and maintenance difficulty, and also reducing equipment investment and floor space. The compact equipment layout helps to shorten pipeline length and reduce the number of bends, thereby reducing fluid resistance and leakage risk, and improving the overall system's operational reliability and economic efficiency.

[0020] Preferably, the first sewage pipeline is equipped with a first check valve, which only allows fluid to flow from the metering tank to the separation tank.

[0021] A first check valve is installed on the first sewage discharge pipeline. Sewage flows automatically into the separation tank by its own gravity, without the need for additional power, thus reducing energy consumption. The check valve effectively prevents dirt, sediment, or impurities that may be present in the separation tank from flowing back into the metering tank, ensuring the purity of the fluid in the metering tank and guaranteeing the accuracy of the metering data. By controlling the fluid to flow only downwards, the sewage discharge and fluid flow direction in the system are ensured to meet the design requirements, maintaining a reasonable liquid level difference and pressure balance, which is conducive to the stable operation of each link.

[0022] Preferably, along the fluid flow direction within the first sewage pipeline, a first level control valve is installed after the first check valve, and a third flow meter is installed after the first level control valve.

[0023] The first level control valve is located after the first check valve. It can regulate the fluid flow according to the system's operational needs, maintaining the level balance between the metering tank and the separating tank. This regulation helps prevent excessive level fluctuations and ensures that the fluid in each tank is in optimal working condition, thereby improving the stability and separation efficiency of the entire system. The second flow meter is installed after the level control valve to monitor the fluid flow through the pipeline in real time. This monitoring can provide real-time data to help operators judge whether the valve regulation effect has met expectations and make timely adjustments to ensure a stable and accurate process flow.

[0024] Preferably, the system also includes a central control system. The multi-well metering skid further includes a first level transmitter. The mechanical end of the first level transmitter is connected to the metering tank, and the signal end of the first level transmitter is connected to the first level control valve. The central control system is communicatively connected to the first level transmitter and the first level control valve. The central control system can control the first level control valve according to the signal transmitted from the first level transmitter.

[0025] In this configuration, the first level transmitter collects the liquid level information of the metering tank in real time and transmits the data to the central control system. Based on the received liquid level signal, the central control system automatically adjusts the opening of the first liquid level control valve to ensure that the liquid level is always kept within the preset range, thus ensuring stable system operation. By automatically adjusting the liquid level, equipment malfunctions or safety hazards caused by excessively high or low liquid levels can be avoided, ensuring that each process is in optimal condition. The central control system can monitor abnormal liquid level data, and once an anomaly is detected, it will promptly issue an alarm and activate corresponding emergency measures to reduce the risk of downtime. The addition of the central control system reduces reliance on manual monitoring and adjustment, thereby reducing the risk of operational errors.

[0026] Preferably, the multi-well metering skid further includes a second level transmitter and a third level transmitter. The mechanical end of the second level transmitter is connected to the separation tank, and the signal end of the second level transmitter is connected to the ESDV valve. The mechanical end of the third level transmitter is connected to the separation tank, and the signal end of the third level transmitter is connected to the second level control valve. The ESDV valve and the second level control valve are installed on the second sewage pipeline.

[0027] With this setup, the second level transmitter monitors the liquid level in the separator tank in real time. Once the liquid level rises abnormally to a preset threshold, it can drive the ESDV valve to close immediately via a signal, serving as an emergency shutdown or flow restriction mechanism. This effectively prevents overfilling or overflow and improves system safety. The third level transmitter, in conjunction with the second level control valve, precisely regulates the discharge of fluid from the separator tank, ensuring that the discharge rate and flow rate in the second drain line remain within a reasonable range, guaranteeing that the liquid level in the separator tank is in optimal working condition. The two level transmitters complement each other, providing redundant monitoring of the liquid level in the separator tank, improving measurement accuracy and system fault tolerance, and ensuring effective monitoring and control of the liquid level even if a single transmitter fails.

[0028] Preferably, the venting and separating skid includes a venting and separating tank and a wastewater tank, with the venting and separating tank located above the wastewater tank. The inlet of the venting and separating tank is connected to the wellhead valve assembly skid, the water jacket heating furnace skid, the multi-well metering skid, and the outlet valve assembly module. The outlet of the venting and separating tank is connected to the venting flare via a venting pipeline. The inlet of the wastewater tank is connected to the drain outlet of the multi-well metering skid, and the wastewater tank is connected to the inlet of the venting and separating tank via an exhaust pipeline. The venting and separating tank is connected to the wastewater tank via a third drain pipeline, which is equipped with a second check valve that only allows fluid to flow from the venting and separating tank to the wastewater tank. The wastewater tank is connected to a sewage discharge device via a fourth drain pipeline.

[0029] The venting separator receives the gas-liquid mixture from the wellhead valve assembly skid and / or multi-well metering skids, and performs preliminary separation inside the tank. This ensures that the gas enters the venting flare for combustion, while the liquid enters the wastewater tank, reducing the possibility of liquid being carried in the gas, improving venting combustion efficiency, and reducing pollutant emissions. Connecting the wastewater tank and the venting separator via an exhaust pipeline allows for the recovery of any gas present in the wastewater tank, improving system safety. The liquid separated by the venting separator enters the wastewater tank through a third sewage pipeline, ensuring effective collection of waste liquid and compliance with environmental protection requirements. A second check valve is installed on the third sewage pipeline to ensure that fluid flows only from the venting separator to the wastewater tank, preventing backflow of accumulated liquid from the wastewater tank back into the venting system, avoiding contamination of the gas treatment equipment, reducing the amount of condensate from the wastewater module carried to the flare head, reducing the amount of condensate in the venting pipeline, and effectively preventing safety accidents. In traditional methods, wastewater and venting separators may need to be treated separately, leading to sewage discharge equipment, such as sewage tank trucks, needing to make multiple trips to the site for collection and transportation. By integrating the sewage tank and the emptying and separating tank onto a single skid, the sewage tanker truck can complete the collection of sewage and the preparation for subsequent emptying and separating treatment in a single operation, significantly reducing the frequency of on-site operations and improving operational efficiency.

[0030] Preferably, the venting and separating skid further includes a fourth level transmitter, the upper mechanical end of which is connected to the venting and separating tank, and the lower mechanical end of which is connected to the wastewater tank.

[0031] Adding a fourth level transmitter can optimize the level control of the venting and separating tanks and the wastewater tank, enabling precise monitoring and intelligent sewage management, improving the level of automation, enhancing system safety, reducing manual intervention and environmental pollution risks, and making the entire venting and separating skid operation more efficient, stable and environmentally friendly.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] 1. The multi-well gas production and gathering process package provided by this invention integrates several valve group skid modules into a wellhead valve group skid. The wellhead of the oil and gas well is connected in parallel to the wellhead valve group separation pipeline and the wellhead valve group metering pipeline via the distribution pipeline. The metering and separation operations of a single oil and gas well can be carried out independently without interrupting the entire system, which greatly improves the efficiency and flexibility of operation. When a new well station needs to be added to the system, there is no need to configure a new surface gathering and transportation system. It is only necessary to connect the newly added well station to the valve group skid module, which saves production costs and improves production efficiency. At the same time, the independence and redundancy of several valve group skid modules also help to isolate faults, reduce the overall downtime caused by local faults, make subsequent maintenance more convenient, and reduce downtime risks. The multi-well gas production and gathering process package provided by this invention enables accurate metering of the gas production and liquid production of a single or multiple well stations, avoiding the traditional practice of configuring the same surface gathering and transportation system for each gas well. This ensures the efficient external transmission performance after the simultaneous separation and metering of multiple well stations, effectively improving the operating efficiency of the entire gathering and transportation system.

[0034] 2. The multi-well gas gathering and transportation process package provided by this invention adopts a skid-mounted design, integrating surface processes such as separation, metering, wastewater treatment, venting, and valve switching onto multiple skids, forming an integrated and compact equipment form. The compact layout helps to reduce pipeline length and the number of bends, reduce fluid resistance, and improve system efficiency. The integrated design reduces the interfaces and connectors between equipment, thereby reducing production risks and investment costs. Attached Figure Description

[0035] Figure 1 A schematic diagram of a multi-well gas production and gathering process package;

[0036] Figure 2 Schematic diagram of wellhead valve assembly skid;

[0037] Figure 3 Schematic diagram of a multi-well location metering skid;

[0038] Figure 4 This is a schematic diagram of a venting and separating skid.

[0039] Marked in the image:

[0040] 1-Wellhead valve assembly skid, 11-Distribution pipeline, 12-Wellhead valve assembly separation pipeline, 13-Wellhead valve assembly metering pipeline, 14-Wellhead valve assembly venting pipeline, 2-Water jacket heating furnace skid, 21-Water jacket heating furnace separation pipeline, 22-Water jacket heating furnace metering pipeline, 3-Multi-well location metering skid, 31-Metering tank, 32-Separation tank, 33-Multi-well location metering skid metering pipeline, 331-First flow meter, 332-Second flow meter, 34-Multi-well location metering skid separation pipeline, 35-First sewage pipeline, 351-First check valve, 352-First level control valve, 353-Third flow meter, 36-Second sewage pipeline, 361-ESDV valve, 362-Second level control valve, 37-First level transmitter, 38-Second level transmitter Level transmitter, 39-Third level transmitter, 310-Multi-well metering skid vent line, 4-Venting separator skid, 41-Venting separator tank, 411-Venting separator tank vent line, 42-Sewage tank, 43-Exhaust line, 44-Third sewage line, 441-Second check valve, 45-Fourth sewage line, 46-Fourth level transmitter, 5-Outlet valve assembly module, 51-Outlet vent line, 6-Venting flare, 100-Wellhead, 201-First line, 2011-First vent line, 202-Second line, 2021-Second vent line, 301-First and second stage throttle valves, 302-Second and second stage throttle valves, 401-First and third stage throttle valves, 402-Second and third stage throttle valves, 200-Sewage discharge equipment. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0042] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0043] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but that it can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0044] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing between identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0045] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0046] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0047] Example 1

[0048] This embodiment provides a multi-well site gas production and gathering process package, which can be used for gas wells, oil wells, and oil and gas well platforms with multiple well sites in adjacent areas. Taking multiple gas wells as an example, using a single multi-well site gas production and gathering process package provided in this embodiment can achieve effective gas-water separation, accurate metering, and efficient external transportation of multiple gas wells.

[0049] Specifically, the multi-well gas production and gathering process package provided in this embodiment includes a wellhead valve assembly skid 1, to... Figure 1 , Figure 2 For example, Figure 1 , Figure 2The diagram illustrates a scenario where three gas production wells use the same multi-site gas production and gathering process package. Specifically, for example... Figure 2 As shown, the wellhead valve assembly skid 1 includes several valve assembly skid modules (e.g., Figure 2 The diagram shows three valve group skid modules. Each valve group skid module includes a distribution pipeline 11, one end of which is connected to the wellhead 100, and the other end of which is connected in parallel to the wellhead valve group separation pipeline 12 and the wellhead valve group metering pipeline 13. Figure 2 For example, the wellhead 100 of each gas well is connected to the inlet of a separate distribution pipeline 11. The outlet of the distribution pipeline 11 is divided into two: one is connected to the metering pipeline 13 of the wellhead valve group, and the other is connected to the separation pipeline 12 of the wellhead valve group.

[0050] by Figure 2 This example illustrates how wellhead valve assembly skid 1 can achieve metering for a single well without affecting the output from other wells. If we want to... Figure 2 If the first well from top to bottom is used for metering, and the other two wells are not used for metering and are directly used for external transmission, then only the... Figure 2 In the first distribution pipeline 11 from top to bottom, the valve on the pipeline corresponding to the wellhead valve group separation pipeline 12 is closed, and the valve on the pipeline corresponding to the wellhead valve group metering pipeline 13 is opened; close the valves corresponding to the wellhead valve group metering pipeline 13 for the other two wells, and open the valves corresponding to the wellhead valve group separation pipeline 12 for the other two wells. The individual metering of the remaining wells is similar to the above operation and will not be described in detail.

[0051] The water jacket heating furnace skid 2 in this embodiment adopts a dual-inlet, dual-outlet process. One end of the water jacket heating furnace skid 2 is connected to the wellhead valve group separation pipeline 12, and the other end is connected to the wellhead valve group metering pipeline 13. Specifically, as shown... Figure 1 As shown, in this embodiment, the water jacket heating furnace skid 2 includes a water jacket heating furnace separation pipeline 21 and a water jacket heating furnace metering pipeline 22. The wellhead valve group separation pipeline 12 is connected to the water jacket heating furnace separation pipeline 21 through a first pipeline 201. A first and second stage throttle valve 301 is installed at the connection between the first pipeline 201 and the wellhead valve group separation pipeline 12. The first pipeline 201 is also connected to the venting and separating skid 4 through a first venting pipeline 2011. Figure 1 As shown, along the fluid flow direction, the first venting pipeline 2011 is located after the first and second stage throttle valve 301, and the water jacket heating furnace separation pipeline 21 is equipped with a first and third stage throttle valve 401.

[0052] The wellhead valve group metering pipeline 13 is connected to the water jacket heater metering pipeline 22 via a second pipeline 202. A second-stage throttle valve 302 is installed at the connection between the second pipeline 202 and the wellhead valve group metering pipeline 13. The second pipeline 202 is connected to the venting and separating skid 4 via a second venting pipeline 2021. Figure 1 As shown, along the fluid flow direction, the second vent line 2021 is located after the second-stage throttle valve 302, and the water jacket heating furnace metering line 22 is equipped with a second-stage throttle valve 402.

[0053] Both the water jacket heating furnace separation pipeline 21 and the water jacket heating furnace metering pipeline 22 are connected to the multi-well metering skid 3.

[0054] First and second stage throttle valves 301 and 302 are respectively installed at the connection points of the first pipeline 201 and the second pipeline 202 with the valve group at the wellhead 100 to regulate the fluid entering the water jacket heating furnace system, ensuring a stable inlet flow rate and avoiding negative impacts on subsequent processes (such as heating, separation, and metering) due to sudden changes in flow rate. First and third stage throttle valves 401 and 402 are respectively installed in the separation pipeline 21 and the metering pipeline of the water jacket heating furnace to achieve further fine control of the fluid after heating treatment, so that the temperature, pressure, and flow rate reach the optimal process conditions, which is conducive to the stable operation of the entire system.

[0055] The first pipeline 201 and the second pipeline 202 are connected to the venting and separating skid 4 through the first venting pipeline 2011 and the second venting pipeline 2021, respectively. This allows excess or abnormal fluid to be discharged in a timely manner when the system pressure is too high or the flow rate is abnormal, preventing system overload or impact and ensuring safe operation of the equipment.

[0056] The fluid within the system is preheated by the water jacket heating furnace skid 2, reducing its viscosity and facilitating more thorough separation of the oil, gas, and water phases. This ensures more stable and accurate downstream metering data. The water jacket heating furnace separation pipeline 21 is designed to connect with the corresponding wellhead valve group separation pipeline 12, and the water jacket heating furnace metering pipeline 22 is designed to connect with the corresponding wellhead valve group metering pipeline 13. This ensures that the separation and metering processes in the overall system do not interfere with each other, allowing for independent metering and separation operations at each well location during multi-well gathering and transportation, thus improving the overall operational efficiency.

[0057] Multi-well metering skid 3 is connected to the outlet of water jacket heating furnace skid 2; multi-well metering skid 3 is used to meter the gas production and / or liquid production of one or more well stations.

[0058] The outlet of the multi-well metering skid 3 is connected to the outlet valve group module 5, for example... Figure 1As shown, the gas outlet at the top of the multi-well metering skid 3 can be connected to the outlet valve group module 5 via the multi-well metering skid metering pipeline 33, allowing natural gas to be transported from the outlet end of the metering skid to the outlet valve group module 5, and then into the external transmission pipeline network or further processing equipment (such as dehydration, booster stations). In this embodiment, the outlet valve group module 5 can be a valve group module commonly used in oil and gas production, generally composed of multiple valves (such as manual ball valves, ESDV emergency shut-off valves, regulating valves, etc.) and manifolds. Its main functions are: controlling the direction of fluid transport (merging natural gas from different wells and transporting it to the main pipeline); performing a safety shut-off function (shutting off the transport in case of overpressure or emergency); and providing maintenance and switching functions (adjusting the flow direction or performing maintenance when the gas production of some wells decreases).

[0059] The venting and separating skid 4 is connected to the drain outlet of the multi-well metering skid 3. In this embodiment... Figures 1-2 Hollow arrows indicate the direction of fluid flow.

[0060] The multi-well gas production and gathering process package provided in this embodiment integrates several valve group skid modules into the wellhead valve group skid 1. The oil and gas wellhead 100 is connected in parallel to the wellhead valve group separation pipeline 12 and the wellhead valve group metering pipeline 13 via the distribution pipeline 11. The metering and separation operations of a single oil and gas well can be carried out independently without interrupting the entire system, which greatly improves the efficiency and flexibility of operation. When a new well station needs to be added to the system, there is no need to configure a new surface gathering and transportation system. It is only necessary to connect the newly added well station to the valve group skid module, which saves production costs and improves production efficiency. At the same time, the independence and redundancy of several valve group skid modules also help to isolate faults, reduce the overall downtime caused by local faults, make subsequent maintenance more convenient, and reduce downtime risks. The multi-well gas production and gathering process package provided by this invention realizes accurate metering of gas production and liquid production of a single or multiple well stations, avoiding the traditional practice of configuring the same surface gathering and transportation system for each gas well. It ensures efficient external transmission performance after multiple well stations are separated and metered at the same time, effectively improving the operating efficiency of the entire gathering and transportation system.

[0061] The multi-well gas gathering and transportation process package provided in this embodiment adopts a skid-mounted design, integrating surface processes such as separation, metering, wastewater treatment, venting, and valve switching onto multiple skids, forming an integrated and compact equipment form. The compact layout helps to reduce pipeline length and the number of bends, reduce fluid resistance, and improve system efficiency. The integrated design reduces the interfaces and connectors between equipment, thereby reducing production risks and investment costs.

[0062] Example 2

[0063] Based on Example 1, the multi-well gas production and gathering process package provided in this example also includes a venting flare 6, which is connected to a venting and separating skid 4. The venting and separating skid 4 is connected to the wellhead valve assembly skid 1, the water jacket heater skid 2, the multi-well metering skid 3, and the outlet valve assembly module 5. Specifically, as shown... Figure 1 , Figure 2 , Figure 3 As shown, the distribution pipeline 11 connected to each wellhead 100 can be connected to the venting and liquid distribution skid 4 via the wellhead valve group venting pipeline 14; the multi-well metering skid 3 can be connected to the venting and liquid distribution skid 4 via the multi-well metering skid venting pipeline 310; and the outlet valve group module 5 can be connected to the venting and liquid distribution skid 4 via the outlet venting pipeline 51 before leaving the station.

[0064] The venting flare 6 is connected to the venting separator skid 4, which in turn is connected to the wellhead valve assembly skid 1, the water jacket heater skid 2, the multi-well metering skid 3, and the outlet valve assembly module 5. This allows for centralized treatment of excess or abnormal gases that may be generated in each process. When gas venting is required due to process fluctuations or pressure anomalies within the system, the waste gas can be uniformly introduced into the venting flare 6 for combustion treatment, thereby effectively preventing the direct emission of harmful and flammable gases into the environment and reducing safety risks.

[0065] Figures 1-3 Hollow arrows indicate the direction of fluid flow.

[0066] Example 3

[0067] like Figure 3 As shown in Example 2, the multi-well gas gathering and transportation process package provided in this example includes a metering tank 31 and a separation tank 32 on the multi-well metering skid 3. The metering tank 31 is located above the separation tank 32. Both the metering tank 31 and the separation tank 32 can be equipped with pressure transmitters and pressure gauges. The pressure transmitters can monitor the internal pressure of the tanks in real time. If the pressure exceeds the set safety range, the system can issue an alarm or automatically implement pressure relief measures (such as opening the vent valve or drain line). Under certain operating conditions, a vacuum may form inside the tank (e.g., if gas is not replenished in time after rapid evacuation). Pressure monitoring can remind operators or the automatic control system to take measures to prevent the tank from deforming or even being damaged due to negative pressure. The metering tank 31 can also be equipped with a level gauge, which can obtain more accurate level data, thereby improving the accuracy and reliability of the metering data.

[0068] The inlet of the metering tank 31 can be connected to the metering pipeline 22 of the water jacket heating furnace, and the outlet of the metering tank 31 is connected to the metering pipeline 33 of the multi-well metering skid. The metering pipeline 33 of the multi-well metering skid can be equipped with a first flow meter 331 and a second flow meter 332. The top of the metering tank 31 is connected to the venting pipeline 310 of the metering skid through a pipeline, which facilitates the venting of the metering tank 31.

[0069] The inlet of the separator tank 32 can be connected to the separator pipeline 21 of the water jacket heater, and the outlet of the separator tank 32 is connected to the multi-well metering skid separator pipeline 34. The multi-well metering skid separator pipeline 34 is connected to the multi-well metering skid metering pipeline 33. The connection between the multi-well metering skid separator pipeline 34 and the multi-well metering skid metering pipeline 33 is located between the first flow meter 331 and the second flow meter 332. That is, along the fluid flow direction in the system, the connection between the multi-well metering skid separator pipeline 34 and the multi-well metering skid metering pipeline 33 is located after the first flow meter 331. In this way, the first flow meter 331 can accurately measure the amount of fluid to be measured in the metering tank 31, and then the second flow meter 332 measures the total flow rate after the multi-well metering skid separator pipeline 34 and the multi-well metering skid metering pipeline 33 are connected.

[0070] After the multi-well metering skid separation pipeline 34 is connected to the multi-well metering skid metering pipeline 33, the multi-well metering skid metering pipeline 33 can be connected to the outlet valve group module 5, and the raw gas enters the downstream pipeline network for further processing. For example... Figure 1 As shown, the outlet valve group module 5 can also be connected to the venting and separating skid 4 via the outlet venting pipeline 51 before leaving the station.

[0071] A first drain line 35 is installed at the bottom of the metering tank 31, and the metering tank 31 is connected to the separation tank 32 through the first drain line 35. A drain port is installed at the bottom of the separation tank 32, and the drain port of the separation tank 32 can be connected to the venting and separating skid 4 through a second drain line 36.

[0072] The multi-well gas gathering and transportation process package provided in this embodiment features a multi-well metering skid 3 with a layered design. The metering tank 31 is located at the top and mainly receives fluids (e.g., gas) after pretreatment by the water jacket heater metering pipeline 22, thus ensuring fluid stability and facilitating accurate metering. The lower separation tank 32 receives fluids from the water jacket heater separation pipeline 21 and wastewater flowing in from the first sewage pipeline 35, which is beneficial for achieving more complete oil-gas-water separation using gravity. A first flow meter 331 is installed on the metering pipeline at the outlet of the metering tank 31 to monitor the main fluid from the metering tank 31 in real time, ensuring accurate and reliable data.

[0073] In the multi-well metering skid 3, the separated flow and the main metering flow are processed separately. The separated tank 32 introduces the processed fluid through the separated pipeline and merges it with the main metering pipeline after the first flow meter 331. This setting ensures that the data to be measured is not affected by the fluid on the separated side. Finally, the flow rate after merging is measured by the second flow meter 332, which improves the accuracy and flexibility of the metering.

[0074] The metering tank 31 and the separating tank 32 are connected by a first drain line 35 to transfer internal contaminants. Meanwhile, the separating tank 32 is connected to the venting and separating skid 4 via a second drain line 36, forming a tiered drainage system. This not only promptly removes accumulated impurities and contaminants from the system but also maintains the cleanliness of the equipment's interior, ensuring long-term stable operation.

[0075] The multi-well metering skid 3 integrates metering, separation, and sewage discharge functions into a single skid, reducing the number of on-site pipelines and interfaces, lowering the difficulty of installation and maintenance, and also reducing equipment investment and floor space. The compact equipment layout helps to shorten pipeline length and reduce the number of bends, thereby reducing fluid resistance and leakage risk, and improving the overall system's operational reliability and economic benefits.

[0076] Example 4

[0077] Based on Embodiment 3, in this embodiment, the first sewage discharge pipeline 35 can also be equipped with a first one-way valve 351. The first one-way valve 351 only allows liquid to flow from the metering tank 31 to the separation tank 32. With the first one-way valve 351 installed on the first sewage discharge pipeline 35, sewage flows automatically and unidirectionally into the separation tank 32 by its own gravity, without the need for additional power assistance, thus reducing energy consumption. The one-way valve effectively prevents dirt, sediment, or impurities that may be present in the separation tank 32 from flowing back into the metering tank 31, ensuring the purity of the liquid in the metering tank 31 and guaranteeing the accuracy of the metering data. By controlling the liquid to flow only downwards, it ensures that the sewage discharge and liquid flow direction in the system meet the design requirements, maintains a reasonable liquid level difference and pressure balance, and is conducive to the stable operation of each link.

[0078] Furthermore, along the liquid flow direction within the first sewage pipe 35 (e.g.) Figure 3 As shown from top to bottom, a first level control valve 352 is installed after the first check valve 351, and a third flow meter 353 is installed after the first level control valve 352. The first level control valve 352, located after the first check valve 351, can regulate the liquid flow according to system operating needs, maintaining a liquid level balance between the metering tank 31 and the separating tank 32. This regulation helps prevent excessive liquid level fluctuations, ensuring that the liquid in each tank is in optimal working condition, thereby improving the stability and separation efficiency of the entire system. The third flow meter 353, installed after the first level control valve 352, can monitor the liquid flow through this pipeline in real time. This monitoring provides real-time data to the system, helping operators determine whether the valve regulation effect has met expectations and make timely adjustments to ensure a stable and accurate process flow.

[0079] Furthermore, in this embodiment, the multi-well gas production and gathering process package also includes a central control system (not shown in the figure), and the multi-well metering skid 3 also includes a first level transmitter 37. The mechanical end of the first level transmitter 37 is connected to the metering tank 31, and the signal end of the first level transmitter 37 is connected to the first level control valve 352. The central control system is communicatively connected to the first level transmitter 37 and the first level control valve 352. The central control system can control the first level control valve 352 according to the signal transmitted from the first level transmitter 37.

[0080] For example, in this embodiment, a Siemens SIMATIC S7-1500 series PLC can be used as the control core, along with the TIA Portal software environment and the WinCC SCADA system to build a central control system. The specific application process is as follows:

[0081] Data Acquisition: The first liquid level transmitter 37 installed on site acquires the liquid level data in the metering tank 31 in real time and transmits it to the S7-1500 PLC via fieldbus such as PROFINET or PROFIBUS.

[0082] Data processing and monitoring: The central control system (based on the WinCC platform) displays, analyzes trends and manages alarms for liquid level data in real time. Operators can monitor the entire process through the human-machine interface (HMI).

[0083] Automatic adjustment: Based on the data provided by the first level transmitter 37, the preset control logic in the PLC automatically calculates the opening degree of the first level control valve 352 that should be adjusted, and outputs the corresponding control signal to achieve automatic adjustment.

[0084] Feedback and closed-loop control: The adjusted liquid level is collected again by the first liquid level transmitter 37 to form a closed-loop control, ensuring that the system always operates within the preset safe and stable state.

[0085] With this setup, the first level transmitter 37 collects the level information of the metering tank 31 in real time and transmits the data to the central control system. Based on the received level signal, the central control system automatically adjusts the opening of the first level control valve 352 to ensure that the level is always kept within the preset range, thus ensuring stable system operation. By automatically adjusting the level, equipment malfunctions or safety hazards caused by excessively high or low levels can be avoided, ensuring that each process is in optimal condition. The central control system can monitor abnormal level data, and once an abnormality is detected, it will issue an alarm in a timely manner and activate corresponding emergency measures to reduce the risk of downtime. The addition of the central control system reduces reliance on manual monitoring and adjustment, thereby reducing the risk of operational errors.

[0086] Furthermore, such as Figure 3As shown, in this embodiment, the multi-well metering skid 3 may further include a second level transmitter 38 and a third level transmitter 39. The mechanical end of the second level transmitter 38 is connected to the separation tank 32, and the signal end of the second level transmitter 38 is connected to the ESDV valve 361 (emergency shut-off valve). The mechanical end of the third level transmitter 39 is connected to the separation tank 32, and the signal end of the third level transmitter 39 is connected to the second level control valve 362. The ESDV valve 361 and the second level control valve 362 are installed on the second drain line 36.

[0087] The second level transmitter 38 monitors the liquid level in the separator 32 in real time. Once the liquid level abnormally reaches the preset threshold, it can drive the ESDV valve 361 to close immediately via a signal, which can serve as an emergency shutdown or flow restriction function, effectively preventing overfilling or overflow and improving system safety. The third level transmitter 39 works in conjunction with the second level control valve 362 to finely regulate the discharge of liquid in the separator 32, ensuring that the discharge rate and flow rate of liquid in the second drain line 36 are always kept within a reasonable range, and ensuring that the liquid level in the separator 32 is in the optimal working state. The two level transmitters complement each other and can redundantly monitor the liquid level in the separator 32, improve measurement accuracy and system fault tolerance, and ensure that effective monitoring and control of the liquid level can still be maintained when a single transmitter fails.

[0088] Example 5

[0089] Based on Example 4, in this example, the venting and separating skid 4 may include a venting and separating tank 41 and a wastewater tank 42. The venting and separating tank 41 is located above the wastewater tank 42. Both the separating tank 41 and the wastewater tank 42 may be equipped with pressure transmitters and pressure gauges.

[0090] The inlet of the venting separator 41 is connected to the wellhead valve assembly skid 1, the water jacket heater skid 2, the multi-well metering skid 3, and the outlet valve assembly module 5. Specifically, for example... Figures 1-4 As shown, the inlet of the venting separator 41 can be connected to the wellhead valve group venting line 14, the first venting line 2011, the second venting line 2021, the multi-well metering skid venting line 310, and the outlet venting line 51. The outlet of the venting separator 41 is connected to the venting flare 6 through the venting separator venting line 411.

[0091] The inlet of sewage tank 42 is connected to the discharge port of multi-well metering skid 3, specifically, for example... Figure 1 , Figure 3 As shown, the inlet of the wastewater tank 42 can be connected to the drain port of the separation tank 32 via the second drain pipe 36. The wastewater tank 42 is connected to the inlet of the vented separator 41 via the vent pipe 43. Specifically, for example... Figure 4 As shown, the exhaust line 43 is connected to the inlet of the venting separator 41 via a tee.

[0092] The venting separator 41 is connected to the wastewater tank 42 via the third drain line 44. The third drain line 44 is equipped with a second check valve 441, which only allows liquid to flow from the venting separator 41 to the wastewater tank 42. The drain outlet of the wastewater tank 42 is connected to the sewage discharge equipment 200 via the fourth drain line 45. The liquid separated from the wastewater tank 42 can be transported to the wastewater treatment plant for treatment through the sewage discharge equipment 200. It can be understood that in this embodiment, the sewage discharge equipment 200 can be a sewage tanker truck or a sewage pump.

[0093] The venting separator 41 receives the gas-liquid mixture from the wellhead valve assembly skid 1 and / or the multi-well metering skid 3, and performs preliminary separation inside the tank. This ensures that the gas enters the venting flare 6 for combustion, while the liquid enters the wastewater tank 42, reducing the possibility of liquid being carried in the gas, improving venting combustion efficiency, and reducing pollutant emissions. The wastewater tank 42 and the venting separator 41 are connected by an exhaust pipeline 43, which can recover any gas that may be present in the wastewater tank 42, improving system safety. The liquid separated by the venting separator 41 enters the wastewater tank 42 through the third sewage pipeline 44, ensuring that the waste liquid is effectively collected and meets environmental protection requirements. A second one-way valve 441 is installed on the third sewage pipeline 44 to ensure that the liquid can only flow from the venting separator 41 to the wastewater tank 42, preventing the accumulated liquid in the wastewater tank 42 from flowing back into the venting system, avoiding contamination of the gas treatment equipment, reducing the amount of condensate from the wastewater module carried to the flare head, reducing the amount of condensate in the venting pipeline, and effectively preventing safety accidents. Traditionally, wastewater and venting separation may require separate treatment, necessitating multiple trips by the wastewater discharge equipment 200 (e.g., a wastewater tanker truck) for collection and transportation. By integrating the wastewater tank 42 and the venting separation tank 41 onto a single skid, the wastewater discharge equipment 200 can complete both wastewater collection and venting separation preparation in a single operation, significantly reducing on-site work frequency and improving operational efficiency.

[0094] Furthermore, such as Figure 4 As shown, the venting and separating skid 4 also includes a fourth level transmitter 46. The upper mechanical end of the fourth level transmitter 46 is connected to the venting and separating tank 41, and the lower mechanical end of the fourth level transmitter 46 is connected to the wastewater tank 42. The fourth level transmitter 46 measures the liquid level in the tanks by measuring the pressure difference between the devices. Adding the fourth level transmitter 46 optimizes the liquid level control of the venting and separating tank 41 and the wastewater tank 42, enabling precise monitoring and intelligent sewage management, improving automation, enhancing system safety, reducing manual intervention and environmental pollution risks, and making the entire venting and separating skid 4 more efficient, stable, and environmentally friendly in operation.

[0095] Figures 1-4 Hollow arrows indicate the direction of fluid flow.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-well site gas production and gathering process package, characterized in that, Includes a wellhead valve assembly skid (1), the wellhead valve assembly skid (1) includes several valve assembly skid modules, the valve assembly skid modules include a distribution pipeline (11), one end of the distribution pipeline (11) is connected to the wellhead (100), and the other end of the distribution pipeline (11) is connected in parallel to the wellhead valve assembly separation pipeline (12) and the wellhead valve assembly metering pipeline (13); Water jacket heating furnace skid (2), one of the water jacket heating furnace skid (2) is connected to the wellhead valve group separation pipeline (12), and the other of the water jacket heating furnace skid (2) is connected to the wellhead valve group metering pipeline (13). A multi-well metering skid (3) is connected to the outlet of the water jacket heating furnace skid (2); the multi-well metering skid (3) is used to measure the gas production and / or liquid production of a single or multiple well stations; the outlet of the multi-well metering skid (3) is connected to the outlet valve group module (5). A venting and separating skid (4) is connected to the drain outlet of the multi-well metering skid (3).

2. The multi-well site gas production and gathering process package according to claim 1, characterized in that, It also includes a venting torch (6), which is connected to the venting liquid separator skid (4), and the venting liquid separator skid (4) is connected to the wellhead valve assembly skid (1), the water jacket heating furnace skid (2), the multi-well metering skid (3), and the outlet valve assembly module (5).

3. The multi-well site gas production and gathering process package according to claim 2, characterized in that, The water jacket heating furnace skid (2) includes a water jacket heating furnace separation pipeline (21) and a water jacket heating furnace metering pipeline (22). The wellhead valve group separation pipeline (12) is connected to the water jacket heating furnace separation pipeline (21) through a first pipeline (201). A first and second stage throttle valve (301) is installed at the connection between the first pipeline (201) and the wellhead valve group separation pipeline (12). The first pipeline (201) is connected to the venting and liquid separation skid (4) through a first venting pipeline (2011). A first and third stage throttle valve (401) is installed on the water jacket heating furnace separation pipeline (21). The wellhead valve group metering pipeline (13) is connected to the water jacket heater metering pipeline (22) via the second pipeline (202). A second-stage throttle valve (302) is installed at the connection between the second pipeline (202) and the wellhead valve group metering pipeline (13). The second pipeline (202) is connected to the venting and liquid separation skid (4) via the second venting pipeline (2021). The water jacket heater metering pipeline (22) is equipped with a second-stage throttle valve (402). The water jacket heater separation pipeline (21) and the water jacket heater metering pipeline (22) are connected to the multi-well location metering skid (3).

4. The multi-well site gas production and gathering process package according to claim 3, characterized in that, The multi-well metering skid (3) includes a metering tank (31) and a separation tank (32), with the metering tank (31) located above the separation tank (32); The inlet of the metering tank (31) is connected to the metering pipeline (22) of the water jacket heater, and the outlet of the metering tank (31) is connected to the metering pipeline (33) of the multi-well metering skid. The multi-well metering skid metering pipeline (33) is equipped with a first flow meter (331) and a second flow meter (332). The multi-well metering skid metering pipeline (33) is connected to the outlet valve group module (5). The inlet of the separation tank (32) is connected to the water jacket heating furnace separation pipeline (21), and the outlet of the separation tank (32) is connected to the multi-well metering skid separation pipeline (34). The multi-well metering skid separation pipeline (34) is incorporated into the multi-well metering skid metering pipeline (33). The connection between the multi-well metering skid separation pipeline (34) and the multi-well metering skid metering pipeline (33) is located between the first flow meter (331) and the second flow meter (332). The metering tank (31) is connected to the separation tank (32) through the first drain line (35), and the separation tank (32) is connected to the venting and separating skid (4) through the second drain line (36).

5. A multi-well site gas production and gathering process package according to claim 4, characterized in that, The first drain line (35) is equipped with a first check valve (351), which only allows fluid to flow from the metering tank (31) to the separation tank (32).

6. A multi-well site gas production and gathering process package according to claim 5, characterized in that, Along the fluid flow direction in the first sewage pipeline (35), a first liquid level control valve (352) is installed after the first check valve (351), and a third flow meter (353) is installed after the first liquid level control valve (352).

7. A multi-well site gas production and gathering process package according to claim 6, characterized in that, It also includes a central control system. The multi-well metering skid (3) also includes a first level transmitter (37). The mechanical end of the first level transmitter (37) is connected to the metering tank (31). The signal end of the first level transmitter (37) is connected to the first level control valve (352). The central control system is communicatively connected to the first level transmitter (37) and the first level control valve (352). The central control system can control the first level control valve (352) according to the signal transmitted from the first level transmitter (37).

8. A multi-well site gas production and gathering process package according to claim 7, characterized in that, The multi-well metering skid (3) also includes a second level transmitter (38) and a third level transmitter (39). The mechanical end of the second level transmitter (38) is connected to the separation tank (32), and the signal end of the second level transmitter (38) is connected to the ESDV valve (361). The mechanical end of the third level transmitter (39) is connected to the separation tank (32), and the signal end of the third level transmitter (39) is connected to the second level control valve (362). The ESDV valve (361) and the second level control valve (362) are installed on the second sewage pipeline (36).

9. A multi-well site gas production and gathering process package according to claim 2, characterized in that, The venting and separating skid (4) includes a venting and separating tank (41) and a wastewater tank (42), with the venting and separating tank (41) located above the wastewater tank (42); The inlet of the venting separator (41) is connected to the wellhead valve assembly skid (1), the water jacket heating furnace skid (2), the multi-well metering skid (3), and the outlet valve assembly module (5). The outlet of the venting separator (41) is connected to the venting torch (6) through the venting separator venting pipeline (411). The inlet of the sewage tank (42) is connected to the drain outlet of the multi-well metering skid (3), and the sewage tank (42) is connected to the inlet of the venting separator (41) through the exhaust pipe (43); The venting separator (41) is connected to the wastewater tank (42) via a third drain line (44). The third drain line (44) is equipped with a second check valve (441), which only allows fluid to flow from the venting separator (41) to the wastewater tank (42). The wastewater tank (42) is connected to the sewage discharge equipment (200) via a fourth drain line (45).

10. A multi-well site gas production and gathering process package according to claim 9, characterized in that, The venting and separating skid (4) also includes a fourth level transmitter (46), the upper mechanical end of which is connected to the venting and separating tank (41), and the lower mechanical end of which is connected to the wastewater tank (42).

Images