A one-pump multi-well filling intelligent foam displacement pry system

Abstract

The utility model discloses a kind of one pump multi-well filling's intelligent foam displacement pry system, it is related to gas production foam displacement agent filling technical field, including filling pry, filling pry is provided with pneumatic pump, gas path system and liquid path system, gas path system includes the pressure reducing valve, separation tank, electric regulating valve and buffer tank that are sequentially communicated, the top of buffer tank is communicated with the air inlet of pneumatic pump, liquid path system includes safety valve and several distribution valves, one end of safety valve is communicated with the liquid outlet of pneumatic pump, one end of several distribution valves is communicated with the other end of safety valve, the other end of several distribution valves can be respectively communicated to several gas wells by pipeline;The one pump multi-well filling's intelligent foam displacement pry system has good gas-liquid separation and pressure stabilizing capacity, is conducive to improving the service life of pneumatic pump and ensuring the accuracy of filling process, simultaneously has the ability of one pump multi-well filling, can effectively reduce use cost.

Description

Technical Field

[0001] This utility model relates to the field of bubble drainage injection technology, specifically an intelligent bubble drainage skid system for injection into multiple wells using a single pump. Background Technology

[0002] In natural gas extraction, foaming agents need to be injected into the well. Under the agitation of gas, the foaming agents can generate a large amount of low-density water-containing foam. These foams can effectively engulf and carry away solid dirt (such as mud, silt, etc.) in the liquid, allowing it to be discharged with the gas flow, thereby achieving the effects of cleaning and increased production.

[0003] Foaming skids are devices used to inject foaming agents into wells. The original foaming skids had the following main defects when in use:

[0004] Firstly, natural gas extraction sites are often located in environments with limited or no electricity. When adding foaming agents, natural gas is usually drawn directly from the well as a power source, and a pneumatic pump is driven to complete the injection process. The existing foaming skids have insufficient separation and pressure stabilization capabilities. Because the directly drawn natural gas contains a large amount of water and other impurities, water entering the pneumatic pump will damage the pump and affect its service life. Furthermore, it will cause fluctuations in the intake pressure, thus affecting the accuracy of the injection process.

[0005] Secondly, the existing pneumatic pumps in the bubble drainage skids are configured in a one-to-one correspondence with natural gas wells or in a one-for-one standby manner. At the extraction site, a large number of pneumatic pumps or bubble drainage skids need to be configured according to the number of gas wells, resulting in high operating costs. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an intelligent foaming skid system for multi-well injection with one pump. It has good gas-liquid separation and pressure stabilization capabilities, which helps to improve the service life of the pneumatic pump and ensure the accuracy of the injection process. At the same time, it has the ability to inject into multiple wells with one pump, which can effectively reduce the cost of use.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] An intelligent foam-draining skid system for multi-well injection with a single pump includes an injection skid housing a pneumatic pump, a gas system, and a hydraulic system. The gas system includes a pressure-reducing valve, a separator, an electric regulating valve, and a buffer tank. One end of the pressure-reducing valve is connected to a gas well via a pipeline, and the other end is connected to the separator. One end of the electric regulating valve is connected to the top of the separator, and the other end is connected to the buffer tank. The top of the buffer tank is connected to the air inlet of the pneumatic pump. The gas system effectively separates impurities such as water from the driving gas and has pressure stabilization capabilities, which helps improve the service life of the pneumatic pump and ensures the accuracy of the injection process. The hydraulic system includes a safety valve and several distribution valves. One end of the safety valve is connected to the outlet of the pneumatic pump, and one end of each of the distribution valves is connected to the other end of the safety valve. The other ends of each distribution valve are connected to several gas wells via pipelines. The intelligent foam-draining skid system has the capability of injecting into multiple wells with a single pump, effectively reducing operating costs.

[0009] Furthermore, the filling skid is also equipped with a controller, a front pressure sensor, a rear pressure sensor, and an injection pressure sensor. The front pressure sensor is used to monitor the pressure at the end of the pressure reducing valve away from the separator tank. The rear pressure sensor is used to monitor the pressure in the pipeline between the electric regulating valve and the buffer tank. The injection pressure sensor is used to monitor the pressure at the end of the safety valve near the pneumatic pump. The front pressure sensor, rear pressure sensor, injection pressure sensor, pressure reducing valve, electric regulating valve, and distribution valve are all electrically connected to the controller.

[0010] Furthermore, it also includes solar photovoltaic panels and a battery pack, wherein the solar photovoltaic panels can generate electrical energy and store it in the battery pack, which is used to power the controller, the front pressure sensor, the rear pressure sensor, the injection pressure sensor, the pressure reducing valve, the electric regulating valve, and the distribution valve.

[0011] Specifically, there are several separation tanks, which are connected in series. The first separation tank is connected to the pressure reducing valve, and the last separation tank is connected to the electric regulating valve.

[0012] Specifically, there are several buffer tanks, which are connected in series. The first buffer tank is connected to the electric regulating valve, and the last buffer tank is connected to the air inlet of the pneumatic pump.

[0013] Furthermore, it also includes a liquid tank, and the inlet of the pneumatic pump is connected to the liquid tank.

[0014] Specifically, a Y-type filter is also connected between the pneumatic pump and the liquid tank.

[0015] The beneficial effects of this utility model are:

[0016] An intelligent foaming agent skid system for multi-well injection includes an injection skid, a liquid tank, and solar photovoltaic panels. The injection skid houses a pneumatic pump, a gas system, and a liquid system. The pneumatic pump can operate in environments with limited or no power to complete the foaming agent injection process. The gas system includes a pressure reducing valve, a separator, an electric regulating valve, and a buffer tank connected in sequence. The two-stage separation by the separator and buffer tank effectively removes impurities such as water from the driving gas, extending the pneumatic pump's lifespan. After separation by the buffer tank, the gas is directly supplied to the pneumatic pump. The buffer tank also has pressure stabilizing capabilities, helping to maintain the stability of the pneumatic pump's operation and ensuring accurate control during the injection process. The liquid system includes a safety valve and several distribution valves. One end of the safety valve is connected to the outlet of the pneumatic pump, and one end of each of the distribution valves is connected to the other end of the safety valve. The other ends of the distribution valves can be connected to several gas wells via pipelines, enabling the intelligent foaming agent skid system to inject gas into multiple wells with a single pump, effectively reducing operating costs. The filling skid is also equipped with a controller, a front pressure sensor, a rear pressure sensor, and an injection pressure sensor. During operation, it can monitor the pressure values ​​at the location of each sensor in real time, and intelligently control the pressure reducing valve, electric regulating valve, and distribution valve through the controller. The installed solar photovoltaic panels can generate electricity under sunlight and store it in the battery pack. The battery pack powers the above-mentioned intelligent control components, so that the intelligent bubble drainage system can operate independently without an external power source. Attached Figure Description

[0017] Figure 1 This is a simplified structural diagram of an intelligent foam drainage skid system for multi-well injection using a single pump, according to this utility model.

[0018] Figure 2 This is a schematic diagram of the overall implementation structure of this utility model;

[0019] In the diagram, 1-filling skid, 2-liquid tank, 3-solar photovoltaic panel, 4-pneumatic pump, 5-pressure reducing valve, 6-separation tank, 7-electric regulating valve, 8-buffer tank, 9-safety valve, 10-distribution valve, 12-front pressure sensor, 13-rear pressure sensor, 14-injection pressure sensor, 15-Y-type filter. Detailed Implementation

[0020] The technical solution of this utility model is described in further detail below with reference to the accompanying drawings, but the scope of protection of this utility model is not limited to the following description.

[0021] like Figure 1 , Figure 2 As shown, an intelligent foaming skid system for multi-well injection using a single pump includes an injection skid 1, a liquid tank 2, and a solar photovoltaic panel 3. The injection skid 1 is equipped with a pneumatic pump 4, a gas system, and a liquid system.

[0022] The pneumatic system includes a pressure reducing valve 5, a separator tank 6, an electric regulating valve 7, and a buffer tank 8. One end of the pressure reducing valve 5 is connected to the separator tank 6, one end of the electric regulating valve 7 is connected to the top of the separator tank 6, the other end of the electric regulating valve 7 is connected to the buffer tank 8, and the top of the buffer tank 8 is connected to the air inlet of the pneumatic pump 4. In operation, the end of the pressure reducing valve 5 furthest from the separator 6 is connected via a pipeline to the gas well (a wellhead separator is installed at the existing gas well to perform preliminary separation of the drawn gas; the pressure reducing valve 5 is directly connected to the existing wellhead separator) to collect natural gas for driving the pneumatic pump 4. The natural gas flows into the separator 6 after being depressurized by the pressure reducing valve 5 to a set pressure. The natural gas is then separated in the separator 6; larger liquid and solid impurities settle at the bottom of the separator 6, while the separated gas rises to the top. The gas at the top of the separator 6 is then introduced into the buffer tank 8 at a set pressure via the electric regulating valve 7. The buffer tank 8 operates on the same principle as the separator 6, further separating the introduced gas to settle impurities. Finally, the gas accumulated at the top of the buffer tank 8 supplies gas to the pneumatic pump 4. It should be understood that the separator 6 and buffer tank 8 are existing pressure vessels with discharge ports at the bottom to periodically discharge settled solid and liquid impurities. In this gas system, the two-stage separation of the separator tank 6 and the buffer tank 8 helps to further separate impurities such as water from the driving gas, preventing these impurities from entering the pneumatic pump 4 and causing damage, thus extending the service life of the pneumatic pump 4. The electric regulating valve 7 is used to regulate the gas storage pressure in the buffer tank 8 (i.e., the driving gas pressure of the pneumatic pump 4). The pneumatic pump 4 draws gas directly from the buffer tank 8. Compared to the form where the electric regulating valve 7 is directly connected to the pneumatic pump 4, the buffer tank 8 also plays a role in stabilizing the gas supply pressure, which helps to ensure the stability of the operating conditions of the pneumatic pump 4, and thus helps to ensure the accuracy of the foaming agent dosing.

[0023] The hydraulic system includes a safety valve 9 and several distribution valves 10. One end of the safety valve 9 is connected to the outlet of the pneumatic pump 4, and one end of each of the distribution valves 10 is connected to the other end of the safety valve 9. The other ends of the distribution valves 10 can be connected to several gas wells via pipelines (an injection pipe is installed at each existing gas well, and the end of the distribution valve 10 furthest from the safety valve 9 is directly connected to the injection pipe; a one-way valve is also installed on the injection pipe to ensure that the medium in the injection pipe can only flow unidirectionally towards the gas well). Furthermore, this intelligent foam pump skid system for multi-well injection with a single pump also includes a liquid tank 2, and the inlet of the pneumatic pump 4 is connected to the liquid tank 2. The liquid tank 2 stores foaming agent. When the pneumatic pump 4 is running, the foaming agent can be drawn from the liquid tank 2 and discharged from the outlet of the pneumatic pump 4. The discharged foaming agent flows through the safety valve 9 and then to the front end of each distribution valve 10. Opening one or more distribution valves 10 allows for the injection of foaming agent into different gas wells. Controlling the opening degree of the distribution valve 10 controls the injection flow rate. The safety valve 9 is used to shut off the discharge port of the pneumatic pump 4 in case of system failure. Therefore, only two sets of intelligent foaming skid systems need to be configured in a one-in-one standby configuration at the work site to complete the foaming agent injection work for multiple gas wells, which can effectively reduce the operating cost compared to the original one-to-one injection method.

[0024] Furthermore, a control cabinet, a front pressure sensor 12, a rear pressure sensor 13, and an injection pressure sensor 14 are also installed inside the filling skid 1. The control cabinet contains a controller; the front pressure sensor 12 and the rear pressure sensor 13 are pressure sensors that detect air pressure. The front pressure sensor 12 is used to monitor the pressure at the end of the pressure reducing valve 5 away from the separator tank 6, and the rear pressure sensor 13 is used to monitor the pressure in the pipeline between the electric regulating valve 7 and the buffer tank 8; the injection pressure sensor 14 is a pressure sensor that detects hydraulic pressure, and the injection pressure sensor 14 is used to monitor the pressure at the end of the safety valve 9 near the pneumatic pump 4. Pressure reducing valve 5, electric regulating valve 7, and distribution valve 10 are all electrically controlled valves. The front pressure sensor 12, rear pressure sensor 13, injection pressure sensor 9, pressure reducing valve 5, electric regulating valve 7, and distribution valve 10 are all electrically connected to the controller. After inputting the set parameters into the system, the controller can automatically control the pressure reducing pressure of pressure reducing valve 5 according to the pressure value monitored by front pressure sensor 12, automatically control the pressure regulating pressure of electric regulating valve 7 according to the pressure value monitored by rear pressure sensor 13, and automatically control the opening degree of distribution valve 10 according to the pressure value monitored by injection pressure sensor 9. Thus, the intelligent foam drainage skid system for multi-well injection with one pump can realize intelligent control of the injection process.

[0025] Because the natural gas extraction site is in an environment with a shortage of electricity, a solar photovoltaic panel 3 and a battery pack are further installed. The solar photovoltaic panel 3 can generate electricity under sunlight and store it in the battery pack. The battery pack is used to power electrical components such as the controller, front pressure sensor 12, rear pressure sensor 13, injection pressure sensor 9, pressure reducing valve 5, electric regulating valve 7 and distribution valve 10, so that the intelligent bubble drainage system can operate on its own without an external power source.

[0026] In practical implementation, several separator tanks 6 can be set as needed. These separator tanks 6 are connected in series, with the first separator tank 6 connected to the pressure reducing valve 5 and the last separator tank 6 connected to the electric regulating valve 7. This multi-stage separation of the driving gas through multiple separator tanks 6 helps ensure the separation effect. Similarly, several buffer tanks 8 can also be set as needed, connected in series, with the first buffer tank 8 connected to the electric regulating valve 7 and the last buffer tank 8 connected to the air inlet of the pneumatic pump 4. A Y-type filter 15 is also connected between the pneumatic pump 4 and the liquid tank 2. This Y-type filter 15 filters impurities in the foaming agent, ensuring stable operation of the pneumatic pump 4 and accurate control of the discharge volume.

[0027] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A smart foam drainage skid system for multi-well injection with a single pump, characterized in that, This includes a filling skid, which is equipped with a pneumatic pump, a pneumatic system, and a hydraulic system. The gas system includes a pressure reducing valve, a separator, an electrically controlled regulating valve, and a buffer tank. One end of the pressure reducing valve can be connected to a gas well via a pipeline, and the other end of the pressure reducing valve is connected to the separator. One end of the electrically controlled regulating valve is connected to the top of the separator, and the other end of the electrically controlled regulating valve is connected to the buffer tank. The top of the buffer tank is connected to the air inlet of the pneumatic pump. The liquid circuit system includes a safety valve and several distribution valves. One end of the safety valve is connected to the outlet of the pneumatic pump, and one end of each of the several distribution valves is connected to the other end of the safety valve. The other ends of the several distribution valves can be connected to several gas wells through pipelines.

2. The intelligent foam drainage skid system for multi-well injection with a single pump according to claim 1, characterized in that, The filling skid is also equipped with a controller, a front pressure sensor, a rear pressure sensor, and an injection pressure sensor. The front pressure sensor is used to monitor the pressure at the end of the pressure reducing valve away from the separator tank. The rear pressure sensor is used to monitor the pressure in the pipeline between the electric regulating valve and the buffer tank. The injection pressure sensor is used to monitor the pressure at the end of the safety valve near the pneumatic pump. The front pressure sensor, rear pressure sensor, injection pressure sensor, pressure reducing valve, electric regulating valve, and distribution valve are all electrically connected to the controller.

3. The intelligent foam drainage skid system for multi-well injection with a single pump according to claim 2, characterized in that, It also includes solar photovoltaic panels and a battery pack, wherein the solar photovoltaic panels can generate electrical energy and store it in the battery pack, which is used to power the controller, the front pressure sensor, the rear pressure sensor, the injection pressure sensor, the pressure reducing valve, the electric regulating valve and the distribution valve.

4. The intelligent foam drainage skid system for multi-well injection with a single pump according to claim 1, characterized in that, There are several separation tanks, which are connected in series. The first separation tank is connected to the pressure reducing valve, and the last separation tank is connected to the electric regulating valve.

5. The intelligent foam drainage skid system for multi-well injection with a single pump according to claim 1, characterized in that, There are several buffer tanks, which are connected in series. The first buffer tank is connected to the electric regulating valve, and the last buffer tank is connected to the air inlet of the pneumatic pump.

6. A smart foam drainage skid system for multi-well injection using a single pump, as described in any one of claims 1 to 5, characterized in that, It also includes a liquid tank, and the inlet of the pneumatic pump is connected to the liquid tank.

7. The intelligent foam drainage skid system for multi-well injection with a single pump according to claim 6, characterized in that, A Y-type filter is also installed between the pneumatic pump and the liquid tank.

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