A multi-port valve combined crude oil production metering platform

Abstract

This utility model discloses a multi-port valve combined crude oil production metering platform, belonging to the field of oilfield production metering technology. The platform includes multiple multi-port valves, a shared crude oil production metering device, and a control box. The metering outlets of each multi-port valve are connected in parallel to a shared pipeline leading to the metering device, and each return outlet is connected in parallel to a mixed-transmission pipeline. The control box provides interlocking rotation control for the multiple multi-port valves, ensuring that only one multi-port valve enters the switching metering state at any given time, while the oil from the remaining multi-port valves flows into the mixed-transmission pipeline via the return outlet. This utility model is suitable for centralized metering of high-yield oil wells such as SAGD wells, and can expand the number of wells connected without increasing the number of complex multi-port valves, while reducing the risk of crossflow and mismetering caused by multiple valves simultaneously entering the metering device.

Description

Technical Field

[0001] This utility model relates to the field of oilfield production metering technology, specifically to a multi-way valve combined crude oil production metering platform, which is particularly suitable for centralized rotation metering of SAGD wells and other high-yield oil wells. Background Technology

[0002] In oilfield production, it is necessary to periodically or in real-time measure the output of each individual well in order to assess reservoir dynamics, analyze production conditions, adjust production systems, and manage production. Currently, common well measurement methods mainly include single-well measurement and centralized measurement.

[0003] Single-well metering involves installing an independent metering device on each oil well. This method has a clearly defined metering target, but it requires high equipment investment, a large footprint, and significant maintenance workload. Centralized metering typically collects oil from multiple wells onto a metering platform. A multi-way valve or valve group selects one well to enter the metering device, while oil from the remaining wells enters a mixed transportation process. This method reduces the number of metering devices, lowers construction costs and floor space, and is widely used in oilfields.

[0004] However, existing centralized metering platforms still have significant shortcomings in high-yield oil well scenarios. Multi-port valves are typically cylindrical pressure-bearing valve bodies with limited circumferential piping space. When oil well production is low and the inlet pipe diameter is small, a single multi-port valve can have multiple inlets; however, for high-yield oil wells such as SAGD wells and heavy oil thermal recovery wells, due to the large single-well fluid production, the inlet pipeline diameter usually needs to be increased to 80mm–100mm or even larger, resulting in a significant reduction in the number of inlets that a single multi-port valve can accommodate. Forcibly increasing the number of inlets can easily lead to problems such as complex valve body structure, difficult pipeline layout, increased manufacturing costs, and inconvenient maintenance.

[0005] Existing technologies also include solutions for automatic well selection and metering using a single multi-way valve in conjunction with a metering device. These solutions primarily address well selection, gas-liquid separation, metering accuracy, and automation control issues within the single multi-way valve. However, they do not effectively solve the problem of insufficient well connections per multi-way valve under conditions of large-diameter high-yield oil wells. Simply adding multiple independent metering platforms would significantly increase equipment investment and floor space requirements.

[0006] Therefore, there is an urgent need to provide a combined metering platform suitable for centralized metering of high-yield oil wells. Without using complex multi-layer multi-way valves or setting up separate metering devices for each group of oil wells, the platform can expand the number of oil wells that can be managed by one metering platform, and ensure reliable switching between multi-way valves, uninterrupted production of non-metered oil wells, and that the metering device will not experience cross-flow or mismetering due to the simultaneous introduction of oil by multiple multi-way valves. Utility Model Content

[0007] Technical problems to be solved

[0008] The purpose of this invention is to overcome the problems in the existing technology of limited number of wells that can be connected to a single multi-way valve when high-yield oil wells are centrally metered, high investment in multiple independent metering platforms, and easy metering crosstalk or switching confusion when multiple multi-way valves share a metering device, and to provide a multi-way valve combined crude oil production metering platform.

[0009] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0010] A multi-port valve combined crude oil production metering platform includes multiple multi-port valves, a shared crude oil production metering device, and a control box. Each multi-port valve has multiple crude oil inlets, a metering outlet, a reflux outlet, and a well selection mechanism for switching between the multiple crude oil inlets.

[0011] The metering outlets of each multi-port valve are connected in parallel to the same common line to the metering unit via their respective multi-port valve metering outlet pipelines. The common line to the metering unit is connected to the inlet of the crude oil production metering device. The return outlets of each multi-port valve are connected in parallel to the same mixed-transmission pipeline via their respective multi-port valve return outlet pipelines.

[0012] Each multi-port valve is equipped with a shut-off valve C on its metering outlet pipeline and a shut-off valve F on its return outlet pipeline. The control box is connected to the control terminal of each multi-port valve to control the switching of each multi-port valve between metering switching and non-metering switching states.

[0013] During platform operation, the control box is configured to allow only one multi-port valve to be in the switching metering state at any given time. The multi-port valve in switching metering state, according to the well selection command, switches the incoming oil from the well it is connected to to the corresponding metering outlet, and then sends the oil to the crude oil production metering device for metering via the multi-port valve's metering outlet pipeline and the shared pipeline to the metering device. The remaining multi-port valves in non-switching metering state have their incoming oil from their connected wells flow into the mixed transport pipeline via the corresponding return outlet and the multi-port valve's return outlet pipeline, without entering the crude oil production metering device.

[0014] Furthermore, the control box is equipped with a PLC or microcontroller. It also contains an interlock control module connected to the actuators of each multi-way valve. When one multi-way valve is in the switching metering state, the interlock control module restricts the other multi-way valves from entering the switching metering state, thus preventing two or more multi-way valves from simultaneously supplying oil to the shared pipeline of the metering unit.

[0015] Furthermore, each multi-way valve can be equipped with a valve position feedback unit, which is connected to the control box and used to provide feedback to the control box on the metering outlet conduction status or return outlet conduction status of the corresponding multi-way valve. The control box determines the actual status of each multi-way valve based on the valve position feedback signal, and after confirming that the other multi-way valves are not in the metering conduction state, allows the target multi-way valve to enter the switching metering state.

[0016] Furthermore, the platform also includes a backup process pipeline and a return pipeline. One end of the backup process pipeline is connected to the return pipeline, and the other end is connected to the mixed-transport pipeline. The return pipeline is connected to the crude oil inlet pipeline of each multi-port valve, and a pipeline sweeping inlet is provided on the return pipeline. A shut-off valve B is installed at the connection between the return pipeline and the crude oil inlet pipeline of each multi-port valve. When the multi-port valve or crude oil production metering device needs maintenance, the oil from the well can be directly fed into the mixed-transport pipeline through the return pipeline and the backup process pipeline, thereby reducing the impact of maintenance on the continuous production of the well.

[0017] Furthermore, each crude oil inlet pipeline of each multi-port valve is equipped with a shut-off valve A; a shut-off valve G is installed on the common pipeline to the metering unit; the crude oil production metering device is equipped with a liquid outlet pipeline and a metering unit gas outlet pipeline; a shut-off valve D is installed on the liquid outlet pipeline, and a shut-off valve E is installed on the metering unit gas outlet pipeline; a gas flow meter and a check valve are also installed on the metering unit gas outlet pipeline; a metering unit drain pipeline is installed at the bottom of the crude oil production metering device. The metered gas and liquid can enter the mixed transmission pipeline through the metering unit gas-liquid mixed transmission pipeline.

[0018] Furthermore, the platform is equipped with 2 to 5 multi-port valves, and each multi-port valve connects to 5 to 16 crude oil inlets of the well. When used for metering SAGD wells or other high-yield oil wells, each multi-port valve preferably has 5 to 8 inlets, and the total number of wells connected by multiple multi-port valves is greater than the number of wells connected by a single multi-port valve.

[0019] Furthermore, the multi-way valve can be a seven-way multi-way valve. The inlet pipe inner diameter of the seven-way multi-way valve can be 80mm–100mm, the metering outlet pipe inner diameter can be 80mm–100mm, and the return outlet inner diameter can be 200mm–300mm. Preferably, the multi-way valve body outer diameter is 500mm, the total height is 1500mm, the design pressure is 2.5MPa, the design temperature is 150℃, and the metering range is 0–300t / d.

[0020] Furthermore, the well selection mechanism of the multi-way valve includes a stepper motor, an upper valve body, a lower valve body, a hollow connecting rod, and an eccentric bushing. The stepper motor is connected to the control box and is used to drive the upper valve body to rotate, aligning the hollow connecting rod with the selected crude oil inlet of the multi-way valve, thereby switching the oil from the well corresponding to that inlet to the metering outlet of the multi-way valve. Oil from other crude oil inlets of the unselected multi-way valve enters the reflux process and is discharged through the reflux outlet 38 of the multi-way valve to the mixed-transport pipeline.

[0021] Furthermore, a safety valve is installed on the mixed transmission pipeline or the return outlet pipeline of the multi-way valve, and the opening pressure of the safety valve can be from 2.0MPa to 2.8MPa.

[0022] Furthermore, the crude oil production metering device can be a tipping bucket meter, a mass flow meter, or a volumetric metering device. When the crude oil production metering device is a tipping bucket meter, it is equipped with a gas-liquid separation chamber and a tipping mechanism. Gas is discharged through the meter's gas outlet pipeline, shut-off valve E, gas flow meter, and check valve, while liquid is discharged through the liquid outlet pipeline and shut-off valve D. After the gas and liquid merge, they enter the mixed transport pipeline through the meter's gas-liquid mixed transport pipeline.

[0023] The working process of this utility model is as follows (taking three seven-way multi-port valves as an example): Assume that multi-port valve A is currently in the switching metering state, while multi-port valves B and C are in the non-switching metering state. According to the control box instruction, multi-port valve A switches the incoming oil from one of the wells to the metering outlet, which then enters the metering device for metering via a shared pipeline. The incoming oil from the other six wells of multi-port valve A, as well as all wells of multi-port valves B and C, converges into the mixed-transport pipeline through their respective return outlets. When it is necessary to meter other wells, the control box can switch multi-port valve A to the non-switching state at any time, switch multi-port valve B or C to the switching metering state, and issue corresponding well selection instructions. The switching between multi-port valves and between wells can be automatically managed by the control program or adjusted manually via buttons.

[0024] Compared with the prior art, this utility model has the following significant advantages.

[0025] First, this utility model uses multiple multi-way valves to share a single crude oil production metering device, which significantly increases the number of oil wells that a metering platform can manage, when a single multi-way valve cannot connect to a sufficient number of high-yield oil wells due to its large inlet pipe diameter and limited circumferential space for valve body arrangement.

[0026] Secondly, this utility model does not adopt a complex multi-layer multi-way valve structure, but combines multiple single-layer multi-way valves. Each multi-way valve still maintains a relatively simple structure, which is convenient for manufacturing, installation, maintenance and replacement.

[0027] Third, this utility model uses a control box to interlock and rotate multiple multi-way valves, so that only one multi-way valve can send oil to the shared pipeline of the metering device and the crude oil production metering device at any given time. This avoids multiple multi-way valves entering the metering device at the same time, which would cause the metering object to be not unique, the metering data to be chaotic, or the pipeline to cross-flow.

[0028] Fourth, in this utility model, the oil in the multi-way valve in the non-switching metering state flows back to the outlet pipeline through the multi-way valve and enters the mixed transportation pipeline. Therefore, the non-metering oil well does not need to stop production, which can meet the continuous production requirements of the oil field.

[0029] Fifth, this utility model is equipped with a backup process pipeline, a return pipeline, a pipeline sweeping inlet, and corresponding shut-off valves, which can provide a bypass process when multi-way valves, metering devices, or related pipelines are under maintenance, thereby improving the maintainability and on-site adaptability of the metering platform.

[0030] Sixth, this utility model is applicable to centralized metering scenarios for SAGD wells, heavy oil thermal recovery wells and other high-yield oil wells. It can improve the well connection capacity and operational reliability of the centralized metering platform while reducing investment and land area. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of a multi-port valve combined crude oil production metering platform according to the present invention.

[0032] Figure 2 This is a schematic diagram of the internal structure of the multi-way valve used in this utility model.

[0033] Explanation of reference numerals in the attached figures

[0034] 1. Multi-port valve inlet pipeline; 8. Pipeline sweeping inlet; 9. Shut-off valve A; 10. Multi-port valve A; 11. Shut-off valve B; 12. Return pipeline; 13. Multi-port valve metering outlet pipeline; 14. Shut-off valve C; 15. Common pipeline to metering unit; 16. Crude oil production metering device; 17. Shut-off valve D; 18. Metering unit gas-liquid mixed transmission pipeline; 19. Metering unit gas outlet pipeline; 20. Shut-off valve E; 21. Gas flow meter; 22. Check valve; 23. Mixed transmission pipeline; 24. Metering unit drain pipeline; 25. Multi-port valve return outlet pipeline; 26. Shut-off valve F; 27. Safety valve; 28. Shut-off valve G; 29. ​​Backup process pipeline; 30. Control box;

[0035] 31. Multi-port valve body; 32. Multi-port valve crude oil inlet; 33. Upper valve body; 34. Lower valve body; 35. Multi-port valve outlet to metering device; 36. Stepper motor; 37. Multi-port valve other crude oil inlet; 38. Multi-port valve return outlet; 39. Hollow connecting rod; 40. Eccentric bushing. Detailed Implementation

[0036] These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0037] The platform uses multiple multi-way valves to share a single crude oil production metering device, and uses a control box to interlock and rotate the multiple multi-way valves, so that only one multi-way valve is in metering mode at any given time, while the rest of the multi-way valves are in non-metering reflux mode. This ensures that while expanding the number of wells connected, the metering object is unique, the production process is continuous, and maintenance is convenient.

[0038] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this utility model by way of example, but should not be used to limit the scope of this utility model. This utility model can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0039] Example 1:

[0040] Reference Figure 1 and Figure 2 This embodiment provides a multi-way valve combined crude oil production metering platform. This platform is used for centralized metering of high-yield SAGD oil wells and includes two seven-way multi-way valves, a shared crude oil production metering device 16, and a control box 30. One of the seven-way multi-way valves... Figure 1 The figure shows a multi-way valve A10. Another multi-way valve can have the same structure and pipeline connection as multi-way valve A10.

[0041] like Figure 1 As shown, multi-port valve A10 is connected to multi-port valve inlet pipeline 1, which is connected to different oil wells. Each multi-port valve inlet pipeline 1 is equipped with a shut-off valve A9, used for opening and closing control of the oil coming from the corresponding oil well or for maintenance isolation. The multi-port valve inlet pipeline 1 is connected to multiple multi-port valve crude oil inlets 32 on the multi-port valve body 31.

[0042] The multi-way valve A10 has one metering outlet and one return outlet. The metering outlet of the multi-way valve is connected to the common line to the metering unit 15 via the multi-way valve metering outlet line 13. A shut-off valve C14 is installed on the multi-way valve metering outlet line 13 to cut off the flow from the multi-way valve to the metering unit during maintenance, isolation, or abnormal operating conditions. A shut-off valve G28 is installed on the common line to the metering unit 15, and the downstream of the common line to the metering unit 15 is connected to the crude oil production metering unit 16.

[0043] The return outlet of multi-way valve A10 is connected to the mixed-transport pipeline 23 via multi-way valve return outlet pipeline 25. A shut-off valve F26 is installed on multi-way valve return outlet pipeline 25 to control the on / off flow of the multi-way valve's return process. A safety valve 27 is installed on either the mixed-transport pipeline 23 or the multi-way valve return outlet pipeline 25 to provide pressure relief protection when the pipeline pressure exceeds a set value. The opening pressure of safety valve 27 can be set according to the site conditions, for example, 2.5 MPa, or within the range of 2.0 MPa to 2.8 MPa.

[0044] like Figure 1 As shown, the platform also includes a return pipeline 12 and a backup process pipeline 29. The return pipeline 12 is connected to the inlet pipeline 1 of the multi-way valve, and a shut-off valve B11 is installed at each connection point. A pipeline cleaning inlet 8 is provided on the return pipeline 12, which can be used to introduce hot water, steam, cleaning media, or cleaning media to clean or clean the return pipeline 12 and related pipelines. One end of the backup process pipeline 29 is connected to the return pipeline 12, and the other end is connected to the mixed transport pipeline 23. When multi-way valve A10, other multi-way valves, or crude oil production metering device 16 require maintenance, the corresponding shut-off valves A9, C14, G28, D17, E20, or F26 can be closed, and the corresponding valves on shut-off valve B11 and the standby process pipeline 29 can be opened, so that the oil from the well can directly enter the mixed transportation pipeline 23 through the return pipeline 12 and the standby process pipeline 29, thereby reducing the impact of maintenance on oil well production.

[0045] The crude oil production metering device 16 can be a tipping bucket metering device. The crude oil production metering device 16 is equipped with a gas-liquid separation chamber and a tipping mechanism. After separation, the gas-liquid mixture entering the crude oil production metering device 16 has the liquid discharged through the liquid outlet pipeline, which is equipped with a shut-off valve D17; the gas is discharged through the metering device gas outlet pipeline 19, which is equipped with a shut-off valve E20, a gas flow meter 21, and a check valve 22 in sequence. The gas flow meter 21 is used to measure the gas flow rate, and the check valve 22 is used to prevent the medium in the mixed transport pipeline 23 from flowing back to the metering device gas outlet pipeline 19. After metering, the gas and liquid can be combined and enter the mixed transport pipeline 23 through the metering device gas-liquid mixed transport pipeline 18. A metering device drain pipeline 24 is provided at the bottom of the crude oil production metering device 16 for discharging sediment, sewage, or maintenance discharge.

[0046] like Figure 2As shown, the multi-way valve includes a multi-way valve body 31. The multi-way valve body 31 is provided with multiple multi-way valve crude oil inlets 32, one of which corresponds to the selected well inlet, while the unselected inlets can be referred to as other crude oil inlets 37. The multi-way valve internally comprises an upper valve body 33, a lower valve body 34, a hollow connecting rod 39, and an eccentric bushing 40. A stepper motor 36 is mounted on the upper part of the multi-way valve and electrically connected to the control box 30. After receiving the well selection command from the control box 30, the stepper motor 36 drives the upper valve body 33 to rotate relative to the lower valve body 34, causing the hollow connecting rod 39 to align and connect with the target multi-way valve crude oil inlet 32 ​​with the cooperation of the eccentric bushing 40. The oil from the selected well enters the multi-way valve's metering outlet 35 via the hollow connecting rod 39, and further enters the multi-way valve's metering outlet pipeline 13. The oil from other crude oil inlets 37 that are not selected in the multi-way valve does not enter the metering outlet 35 of the multi-way valve, but is discharged through the return outlet 38 of the multi-way valve and enters the mixed transportation pipeline 23 through the return outlet pipeline 25 of the multi-way valve.

[0047] The control box 30 is equipped with a PLC or microcontroller and an interlock control module for switching control between multiple multi-way valves. The control box 30 is connected to the actuators of multi-way valve A10 and other multi-way valves. The control box 30 is used to send switching commands and well selection commands to each multi-way valve and control the switching of each multi-way valve between switching metering state and non-switching metering state.

[0048] In this embodiment, the control logic of the control box 30 is as follows: at any given time, only one multi-port valve is allowed to be in the switching metering state. For example, when multi-port valve A10 is in the switching metering state, the control box 30 prohibits other multi-port valves from entering the switching metering state. At this time, according to the well selection command, multi-port valve A10 causes the oil from the well corresponding to one of the inlet pipelines in multi-port valve inlet pipeline 1 to enter the multi-port valve metering outlet 35, and then enter the crude oil production metering device 16 through multi-port valve metering outlet pipeline 13, shut-off valve C14, metering common pipeline 15, and shut-off valve G28. The oil from the remaining inlets of multi-port valve A10 that are not selected, as well as other multi-port valves in non-switching metering states, enters the mixed transportation pipeline 23 through the corresponding multi-port valve return outlet 38, multi-port valve return outlet pipeline 25, and shut-off valve F26.

[0049] When switching to another multi-port valve for metering is required, the control box 30 first exits the switching metering state of the multi-port valve A10, causing all its incoming oil to be transferred to the reflux process; then, it allows the target multi-port valve to enter the switching metering state and performs well selection metering on the oil well connected to the target multi-port valve. Through this interlocked rotation control, it is possible to avoid two or more multi-port valves simultaneously supplying oil to the shared pipeline 15 of the metering device, thereby ensuring that the crude oil production metering device 16 corresponds to the metering of only one oil well at any given time.

[0050] Furthermore, valve position feedback units can be installed at the actuators or well selection mechanisms of each multi-port valve. These feedback units send feedback to the control box 30 regarding the metering outlet conduction status, return outlet conduction status, or well selection position status of the corresponding multi-port valve. The control box 30 determines whether the multi-port valve has reached the designated position based on the valve position feedback signal. Only when the control box 30 confirms that the current multi-port valve has exited the switching metering state and other multi-port valves are not in the metering conduction state is the target multi-port valve allowed to enter the switching metering state. This further improves the safety and metering reliability when multiple multi-port valves share the crude oil production metering device 16.

[0051] In this embodiment, the multi-way valve can be a seven-way multi-way valve. Each seven-way multi-way valve corresponds to seven multi-way valve inlet pipelines 1, with an inner diameter of 80mm to 100mm for the inlet pipeline, an inner diameter of 80mm to 100mm for the metering outlet pipeline, and an inner diameter of 200mm to 300mm for the return outlet. Preferably, the multi-way valve body 31 has an outer diameter of 500mm, a total height of 1500mm, a design pressure of 2.5MPa, a design temperature of 150℃, and a metering range of 0 to 300t / d. By combining two seven-way multi-way valves, it is possible to achieve alternating metering of crude oil production from 14 high-yield SAGD oil wells using a single crude oil production metering device 16.

[0052] Example 2:

[0053] This embodiment is basically the same as Embodiment 1, except that the platform is equipped with three multi-port valves, each of which is a five-way multi-port valve, used to manage 15 conventional high-yield oil wells. The metering outlets of the three multi-port valves are all connected in parallel to the same metering-to-the-meter common pipeline 15 through their respective multi-port valve metering outlet pipelines 13, and the return outlets of the three multi-port valves are all connected in parallel to the same mixed-transport pipeline 23 through their respective multi-port valve return outlet pipelines 25.

[0054] The control box 30 controls the three multi-port valves according to a preset rotation cycle. For example, the control box 30 can be set to allow each multi-port valve to sequentially enter a switching metering state for 30 minutes. During the switching metering state of each multi-port valve, the five oil wells connected to that multi-port valve are metered sequentially. After the current multi-port valve completes metering, the control box 30 exits the switching metering state and allows the next multi-port valve to enter the switching metering state. The remaining unmetered oil wells always enter the mixed transportation pipeline 23 through the corresponding multi-port valve return outlet 38 and the multi-port valve return outlet pipeline 25.

[0055] This embodiment can expand the number of oil wells managed by the metering platform to 15 while maintaining one crude oil production metering device 16, and at the same time, the interlock control of the control box 30 prevents multiple multi-way valves from entering the metering process at the same time.

[0056] Example 3:

[0057] This embodiment is basically the same as Embodiment 1, except that the crude oil production metering device 16 uses a mass flow meter. The mass flow meter can directly measure the mass flow rate and density of the crude oil entering it, and is suitable for occasions with high metering accuracy requirements.

[0058] In this embodiment, the common pipeline 15 to the metering unit is connected to the inlet of the mass flow meter, and the outlet of the mass flow meter is connected to the mixed transport pipeline 23. Since the mass flow meter can directly measure the fluid, the gas outlet pipeline 19 of the metering unit, the shut-off valve E20, the gas flow meter 21, the one-way valve 22, and part of the gas-liquid separation structure can be simplified or omitted according to actual needs. The control box 30 simultaneously collects the flow signal from the mass flow meter and associates it with the well selection status and switching metering status of each multi-way valve to form the production data of each single well.

[0059] In this embodiment, the metering outlets of each multi-port valve are still connected in parallel to the common pipeline 15 to the metering unit via the multi-port valve metering outlet pipeline 13, and each return outlet is still connected in parallel to the mixed transport pipeline 23 via the multi-port valve return outlet pipeline 25. The control box 30 still follows the interlock control logic to ensure that only one multi-port valve supplies oil to the crude oil production metering device 16 at any given time.

[0060] Example 4:

[0061] This embodiment is basically the same as Embodiment 1, except that the platform is mainly used in scenarios with frequent maintenance or where heavy oil is prone to condensation. In this case, the pipeline cleaning inlet 8 can be connected to a hot water, steam, or cleaning medium supply device. When there is a risk of blockage in the return pipeline 12, the multi-way valve inlet pipeline 1, the multi-way valve metering outlet pipeline 13, the metering-to-common pipeline 15, or the multi-way valve return outlet pipeline 25, cleaning medium can be introduced into the return pipeline 12 through the pipeline cleaning inlet 8. In conjunction with the opening and closing of the shut-off valves A9, B11, C14, F26, G28, D17, and E20, the designated pipeline section can be cleaned, cleaned, or isolated for discharge.

[0062] With this configuration, the platform can not only achieve centralized metering of multiple multi-way valves sharing a single crude oil production metering device 16, but also improve the convenience of maintenance and operational reliability under heavy oil, high wax content, or high sand content conditions.

[0063] This utility model's multi-port valve combination crude oil production metering platform can be applied to oilfield production sites, especially suitable for SAGD wells, heavy oil thermal recovery wells, high-yield oil wells, or well groups requiring centralized rotation metering. The platform expands the number of wells that can be connected through multiple multi-port valve combinations, reduces equipment investment through a shared crude oil production metering device 16, and ensures the uniqueness of the metered object through interlocking rotation control of the control box 30. It has the advantages of simple structure, reliable operation, convenient maintenance, and strong field adaptability, possessing excellent industrial practicality.

[0064] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0065] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0066] Furthermore, the terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0067] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0068] All terms used in this invention have the same meaning as understood by one of ordinary skill in the art to which this invention pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0069] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0070] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. A multi-pass valve combined crude oil production metering platform comprising a plurality of multi-pass valves, a common crude oil production metering device (16) and a control cabinet (30), characterized in that, Each of the multi-way valves has multiple crude oil inlets, a metering outlet, a reflux outlet, and a well selection mechanism for switching between the multiple crude oil inlets; The metering outlets of each multi-port valve are connected in parallel to the same metering device common line (15) through the corresponding multi-port valve metering outlet pipeline (13), and the metering device common line (15) is connected to the inlet of the crude oil production metering device (16). The return outlets of each multi-way valve are connected in parallel to a mixed transport pipeline (23) through the corresponding multi-way valve return outlet pipeline (25). Each of the multi-port valve metering outlet pipelines (13) is equipped with a shut-off valve C (14), and each of the multi-port valve return outlet pipelines (25) is equipped with a shut-off valve F (26). The control box (30) is connected to the control terminal of each of the multi-way valves, and is used to control each of the multi-way valves to switch between switching metering state and non-switching metering state; The control box (30) is configured to allow only one of the multi-way valves to be in the switching metering state at any given time, and to send the oil from the well connected to it to the crude oil production metering device (16) for metering through its metering outlet, the multi-way valve metering outlet pipeline (13) and the common pipeline to the metering device (15). The oil from the other multi-way valves that are not in the switching metering state flows into the mixed transport pipeline (23) through their respective return outlets and the multi-way valve return outlet pipelines (25).

2. A multi-pass valve combined crude oil production metering platform according to claim 1, characterized in that, The control box (30) is equipped with an interlock control module, which is electrically connected to the actuator of each multi-way valve. The interlock control module is used to restrict the other multi-way valves from entering the switching metering state when one multi-way valve is in the switching metering state.

3. A multi-pass valve combined crude oil production metering platform according to claim 2, characterized in that, Each of the multi-way valves is provided with a valve position feedback unit, which is electrically connected to the control box (30) and is used to provide feedback to the control box (30) on the metering outlet conduction status or return outlet conduction status of the corresponding multi-way valve.

4. The multi-pass valve combined crude oil production metering platform of claim 1, wherein, The platform also includes a backup process pipeline (29) and a return pipeline (12); one end of the backup process pipeline (29) is connected to the return pipeline (12), and the other end is connected to the mixed transport pipeline (23); the return pipeline (12) is connected to the crude oil inlet pipeline of each of the multi-port valves, and a pipeline sweeping inlet (8) is provided on the return pipeline (12); a shut-off valve B (11) is provided at the connection between the return pipeline (12) and the crude oil inlet pipeline of each of the multi-port valves.

5. A multi-pass valve combined crude oil production metering platform as claimed in claim 1, wherein, Each of the multi-port valves is equipped with a shut-off valve A (9) on each crude oil inlet pipeline; a shut-off valve G (28) is installed on the common pipeline to the metering device (15); a liquid outlet pipeline and a metering device gas outlet pipeline (19) are installed on the crude oil production metering device (16); a shut-off valve D (17) is installed on the liquid outlet pipeline, and a shut-off valve E (20) is installed on the metering device gas outlet pipeline (19); a gas flow meter (21) and a check valve (22) are also installed on the metering device gas outlet pipeline (19); a metering device drain pipeline (24) is installed at the bottom of the crude oil production metering device (16).

6. A multi-pass valve combined crude oil production metering platform according to claim 1, characterized in that, The number of the multiple multi-port valves is 2 to 5, and the number of crude oil inlets connected to each multi-port valve is 5 to 16. When the multi-port valve is used for metering SAGD wells or high-yield oil wells, the number of crude oil inlets of each multi-port valve is 5 to 8, and the total number of wells connected after the combination of multiple multi-port valves is greater than the number of wells connected to a single multi-port valve.

7. A multi-pass valve combined crude oil production metering platform according to claim 1, characterized in that, The multi-way valve is a seven-way multi-way valve. The inner diameter of the inlet pipe of the multi-way valve is 80-100mm, the inner diameter of the metering outlet pipe is 80-100mm, and the inner diameter of the reflux outlet is 200-300mm.

8. A multi-pass valve combined crude oil production metering platform according to claim 1, characterized in that, The well selection mechanism of the multi-way valve includes a stepper motor (36), an upper valve body (33), a lower valve body (34), a hollow connecting rod (39), and an eccentric bushing (40). The stepper motor (36) is electrically connected to the control box (30) and is used to drive the upper valve body (33) to rotate, so that the hollow connecting rod (39) is aligned and connected with the selected crude oil inlet, thereby switching the oil coming from the well corresponding to the crude oil inlet to the metering outlet of the multi-way valve.

9. A multi-pass valve combined crude oil production metering platform according to claim 1, characterized in that, A safety valve (27) is provided on the mixed transport pipeline (23) or the multi-way valve return outlet pipeline (25), and the opening pressure of the safety valve (27) is 2.0 MPa to 2.8 MPa.

10. A multi-pass valve combined crude oil production metering platform as claimed in claim 5, wherein, The crude oil production metering device (16) is a tipping bucket meter, a mass flow meter or a volumetric metering device; when the crude oil production metering device (16) is a tipping bucket meter, it is equipped with a gas-liquid separation chamber and a tipping mechanism inside, a gas flow meter (21) and a one-way valve (22) are installed on the gas outlet pipeline (19) of the meter, a shut-off valve D (17) is installed on the liquid outlet pipeline, and a meter drain pipeline (24) is installed at the bottom of the crude oil production metering device (16).

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