Agent injection device for gas well cluster well site

Abstract

The utility model discloses an agent injection device for a gas well cluster well site, which comprises a liquid inlet pipeline and an agent injection main pipeline, a first manual switching control valve is arranged at the joint of the liquid inlet pipeline and the agent injection main pipeline, a liquid feeding pump is arranged on the liquid inlet pipeline, and the liquid inlet pipeline is further connected with an agent storage tank through a pipeline. The connecting position of the agent storage tank and the liquid inlet pipeline is located between the liquid feeding pump and the first manual switching control valve, the agent injection main pipeline is connected with a gas production tree through a plurality of agent injection branch pipelines, and frequency conversion control high-pressure injection pumps are arranged on the agent injection branch pipelines. According to the utility model, the problem of low automation and intelligence degree of the existing vehicle-mounted foam drainage process technology is solved, one set of agent injection device can be used for simultaneously and continuously injecting agents into a plurality of gas wells in a cluster well site at different displacements, and the defects that the foam drainage operation depends on manpower, the foam drainage operation conditions are limited and the foam drainage efficiency is low are also overcome; therefore, the gas well drainage measure effect and economic benefits are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drainage and gas production equipment, and relates to an injection device used in a gas well cluster field. Background Art

[0002] In the development of tight gas reservoirs, gas wells commonly produce water. As natural gas is continuously produced, formation pressure gradually decreases, and the gas production rate of a single well falls below the critical liquid-carrying rate, resulting in liquid accumulation at the bottom of the well and affecting normal gas production. To address this issue, water drainage gas recovery technology has emerged. Its core purpose is to effectively drain the bottom of the well through various methods, ensuring that natural gas can flow smoothly from the formation to the wellhead.

[0003] Foam drainage and gas recovery (Foam drainage) is a primary method for drainage and gas recovery, with a relatively wide range of applications and a relatively high frequency of operations. Currently, mobile foam drainage operations primarily rely on vehicle-mounted filling equipment. Construction teams follow operational instructions, driving vehicles to the wellsite and manually deploying and performing operations on-site.

[0004] Since the drainage operation relies on manpower and has a low degree of automation, it is impossible to drain multiple gas wells at the same time. Technical personnel are unable to guide on-site production in real time and optimize measures in a timely manner. In addition, it is limited by special weather and whether the roads are clear, which to a certain extent restricts the normal production capacity of the gas wells. There are certain deficiencies and shortcomings in improving the efficiency and economic benefits of gas well drainage measures. Utility Model Content

[0005] The utility model aims to provide an injection device for a gas well cluster well field, which solves the problems of limited operating conditions and low efficiency of existing vehicle-mounted foam drainage.

[0006] The technical solution adopted by the present invention is an injection device for a gas well cluster well field, comprising a liquid inlet pipeline and an injection main line, a first manual switching control valve being provided at the connection between the liquid inlet pipeline and the injection main line, a liquid feeding pump being provided on the liquid inlet pipeline, the liquid inlet pipeline being further connected to a medicine storage tank through a pipeline, the connection position between the medicine storage tank and the liquid inlet pipeline being located between the liquid feeding pump and the first manual switching control valve, the injection main line being connected to gas production trees respectively through a plurality of injection branch lines, and a frequency-controlled high-pressure injection pump being provided on the injection branch line.

[0007] The utility model is also characterized in that:

[0008] The chemical storage tank is connected to a sewage pipeline.

[0009] There are two reagent storage tanks, both of which are connected to a sewage pipeline, and a second manual switching control valve is provided between the reagent storage tanks and the sewage pipeline.

[0010] A liquid level gauge is provided in the medicine storage tank.

[0011] It also includes an injection control system RTU, which includes a CPU. The CPU is connected to an interface module and a wireless communication module. The interface module of the injection control system RTU is connected to the liquid feeding pump and the frequency conversion controlled high-pressure injection pump through a transmission line. The injection control system RTU sends an operation signal to the liquid feeding pump and the frequency conversion controlled high-pressure injection pump through the transmission line.

[0012] The injection control system RTU is also connected to batteries and solar photovoltaic panels in sequence, and the batteries are also connected to the liquid feeding pump and the frequency conversion controlled high-pressure injection pump respectively.

[0013] The injection control system RTU is connected to a power detector, a pressure gauge, a flow meter, and a liquid level meter. The liquid feeding pump and the frequency conversion controlled high-pressure injection pump are both equipped with a pressure gauge and a flow meter. The power detector, pressure gauge, flow meter, and liquid level meter transmit the collected data to the CPU of the injection control system RTU through the interface module. The wireless communication module of the injection control system RTU sends the collected data in the CPU to the mobile terminal.

[0014] The power tester is connected to the battery.

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

[0016] The utility model is used for the injection device of a gas well cluster well field, which solves the problems of low automation and intelligence of the existing vehicle-mounted foam drainage process technology, and can realize a set of injection devices to continuously inject chemicals with different displacements into multiple gas wells in the cluster well field at the same time, and also solves the defects that the foam drainage operation relies on manpower, the foam drainage operation conditions are limited, and the foam drainage efficiency is low, thereby improving the effect and economic benefits of gas well drainage measures; the injection device of the utility model has a reasonable layout and a chemical storage function, and the situation of sudden cessation of chemical injection will not occur, thereby ensuring the stability and continuity of the foam drainage operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a structural schematic diagram of an injection device used in a gas well cluster well field.

[0018] In the figure, 1. Liquid inlet pipeline, 2. Injection main line, 3. First manual switching control valve, 4. Liquid feeding pump, 5. Chemical storage tank, 6. Injection branch pipeline, 7. Gas tree, 8. Frequency conversion controlled high-pressure injection pump, 9. Sewage pipeline, 10. Second manual switching control valve, 11. Injection control system RTU, 12. Battery, 13. Solar photovoltaic panel. DETAILED DESCRIPTION

[0019] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments described are only a portion of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1

[0021] The present embodiment provides an injection device for a gas well cluster well site, comprising a liquid inlet pipeline 1 and an injection main line 2. A first manual switching control valve 3 is provided at the connection between the liquid inlet pipeline 1 and the injection main line 2. The first manual switching control valve 3 serves as a switch for injecting chemicals. When the first manual switching control valve 3 is opened, chemicals (foaming agent and corrosion inhibitor) can be injected into the well. When the first manual switching control valve 3 is closed, the injection of chemicals into the well is cut off. A liquid feeding pump 4 is provided on the liquid inlet pipeline 1. The liquid inlet pipeline 1 is externally connected to a chemical source for transmitting the chemical. The liquid inlet pipeline 1 is also connected to a chemical storage tank 5 through a pipeline. The connection position of the chemical storage tank 5 and the liquid inlet pipeline 1 is located between the liquid feeding pump 4 and the first manual switching control valve 3. The injection main line 2 is connected to a gas production tree 7 through multiple injection branch lines 6, and a variable frequency controlled high-pressure injection pump 8 is provided on the injection branch line 6.

[0022] This embodiment only represents a preferred implementation of the injection device of the present invention for a gas well cluster well field. Any injection device designed with similar technical features to the present invention will fall within the protection scope of the injection device of the present invention for a gas well cluster well field.

[0023] Example 2

[0024] The present embodiment provides an injection device for a gas well cluster well field, comprising a liquid inlet pipeline 1 and an injection main line 2. A first manual switching control valve 3 is provided at the connection between the liquid inlet pipeline 1 and the injection main line 2. A liquid feeding pump 4 is provided on the liquid inlet pipeline 1. The liquid inlet pipeline 1 is also connected to a medicine storage tank 5 through a pipeline. The connection position of the medicine storage tank 5 and the liquid inlet pipeline 1 is located between the liquid feeding pump 4 and the first manual switching control valve 3. The liquid feeding pump 4 is used to draw the medicine into the medicine storage tank 5 for storage and standby. The medicine storage tank 5 is connected to a sewage pipeline 9. The medicine often has impurities and precipitates deposited at the bottom of the medicine storage tank 5. The impurity precipitates of the medicine are discharged through the sewage pipeline 9, thereby ensuring the efficacy of the medicine.

[0025] The injection main line 2 is connected to the gas production tree 7 through multiple injection branch lines 6, that is, each gas production tree 7 corresponds to an injection branch line 6. Therefore, the injection device of this embodiment can inject multiple gas wells, improve the injection efficiency, and further improve the foam removal efficiency. A variable frequency controlled high-pressure injection pump 8 is provided on the injection branch line 6. When the first manual switching control valve 3 is opened, the variable frequency controlled high-pressure injection pump 8 draws the agent in the liquid inlet line 1 into the injection main line 2 and the injection branch line 6 in turn, and injects it into the well to achieve injection.

[0026] This embodiment only represents a preferred implementation of the injection device of the present invention for a gas well cluster well field. Any injection device designed with similar technical features to the present invention will fall within the protection scope of the injection device of the present invention for a gas well cluster well field.

[0027] Example 3

[0028] This embodiment provides an injection device for a gas well cluster well field, including a liquid inlet pipeline 1 and an injection main line 2. A first manual switching control valve 3 is provided at the connection between the liquid inlet pipeline 1 and the injection main line 2. A liquid feeding pump 4 is provided on the liquid inlet pipeline 1. The liquid inlet pipeline 1 is also connected to two chemical storage tanks 5 through pipelines to meet the required storage volume of the chemical. The connection position of the chemical storage tank 5 and the liquid inlet pipeline 1 is located between the liquid feeding pump 4 and the first manual switching control valve 3.

[0029] Both medicine storage tanks 5 are connected to the sewage pipeline 9 to facilitate the discharge of impurities and sediments in the medicine, and a second manual switching control valve 10 is provided between the medicine storage tank 5 and the sewage pipeline 9. The second manual switching control valve 10 serves as the sewage switch of the medicine storage tank 5. When the second manual switching control valve 10 is opened, the impurities and sediments in the medicine storage tank 5 are discharged. When the second manual switching control valve 10 is opened, the impurities and sediments in the medicine storage tank 5 continue to accumulate.

[0030] The injection main line 2 is connected to the gas production tree 7 through multiple injection branch lines 6, that is, each gas production tree 7 corresponds to an injection branch line 6. Therefore, the injection device of this embodiment can inject multiple gas wells, improve the injection efficiency, and further improve the foam removal efficiency. A variable frequency controlled high-pressure injection pump 8 is provided on the injection branch line 6. When the first manual switching control valve 3 is opened, the variable frequency controlled high-pressure injection pump 8 draws the agent in the liquid inlet line 1 into the injection main line 2 and the injection branch line 6 in turn, and injects it into the well to achieve injection.

[0031] This embodiment only represents a preferred implementation of the injection device of the present invention for a gas well cluster well field. Any injection device designed with similar technical features to the present invention will fall within the protection scope of the injection device of the present invention for a gas well cluster well field.

[0032] Example 4

[0033] The present embodiment provides an injection device for a gas well cluster well field, comprising a liquid inlet pipeline 1 and an injection main line 2, a first manual switching control valve 3 is provided at the connection between the liquid inlet pipeline 1 and the injection main line 2, the first manual switching control valve 3 serves as a switch for injecting the agent, a liquid feeding pump 4 is provided on the liquid inlet pipeline 1, the liquid inlet pipeline 1 is externally connected to a drug source, the liquid inlet pipeline 1 is also connected to a drug storage tank 5 through a pipeline, a liquid level gauge is provided in the drug storage tank 5, and is used to monitor the level of the drug in the drug storage tank 5. The storage volume of the agent can be determined by stopping storage or increasing storage as required. The connection position between the agent storage tank 5 and the liquid inlet pipeline 1 is located between the liquid feeding pump 4 and the first manual switching control valve 3. The injection main line 2 is connected to the gas production tree 7 through multiple injection branch lines 6. The injection branch line 6 is provided with a variable frequency controlled high-pressure injection pump 8. The variable frequency controlled high-pressure injection pump 8 draws the agent in the liquid inlet pipeline 1 into the injection main line 2 and the injection branch line 6 in turn, and injects it into the well to achieve injection.

[0034] This embodiment only represents a preferred implementation of the injection device of the present invention for a gas well cluster well field. Any injection device designed with similar technical features to the present invention will fall within the protection scope of the injection device of the present invention for a gas well cluster well field.

[0035] Example 5

[0036] The present embodiment provides an injection device for a gas well cluster well field, comprising a liquid inlet pipeline 1 and an injection main line 2. A first manual switching control valve 3 is provided at the connection between the liquid inlet pipeline 1 and the injection main line 2. The first manual switching control valve 3 serves as a switch for injecting chemicals. When the first manual switching control valve 3 is opened, chemicals can be injected into the well, and when the first manual switching control valve 3 is closed, the injection of chemicals into the well is cut off. A liquid feeding pump 4 is provided on the liquid inlet pipeline 1. The liquid inlet pipeline 1 is externally connected to a chemical source for transmitting chemicals. The liquid inlet pipeline 1 is also connected to a chemical storage tank 5 through a pipeline. A liquid level gauge is provided in the chemical storage tank 5. The connection position between the chemical storage tank 5 and the liquid inlet pipeline 1 is located between the liquid feeding pump 4 and the first manual switching control valve 3. The injection main line 2 is respectively connected to a gas production tree 7 through a plurality of injection branch lines 6. A variable frequency controlled high-pressure injection pump 8 is provided on the injection branch line 6.

[0037] It also includes an injection control system RTU11, which includes a CPU. The CPU is connected to an interface module and a wireless communication module. The interface module of the injection control system RTU11 is connected to the liquid feeding pump 4 and the frequency-controlled high-pressure injection pump 8 through a transmission line. The injection control system RTU sends an operation signal to the liquid feeding pump 4 and the frequency-controlled high-pressure injection pump 8 through the transmission line, that is, controls whether to store the agent in the agent storage tank 5, and controls whether to inject the agent into the gas well. The frequency-controlled high-pressure injection pump 8 can control its operating parameters through the injection control system RTU11 to adjust the displacement, that is, adjust the injection rate of the agent according to the different conditions of each gas well, reasonably use the agent, avoid waste, and at the same time, for gas wells requiring a larger amount of agent, there will be no insufficient amount of agent and poor foaming effect.

[0038] This embodiment only represents a preferred implementation of the injection device of the present invention for a gas well cluster well field. Any injection device designed with similar technical features to the present invention will fall within the protection scope of the injection device of the present invention for a gas well cluster well field.

[0039] Example 6

[0040] The present embodiment provides an injection device for a gas well cluster well field, comprising a liquid inlet pipeline 1 and an injection main line 2. A first manual switching control valve 3 is provided at the connection between the liquid inlet pipeline 1 and the injection main line 2. The first manual switching control valve 3 serves as a switch for injecting chemicals. When the first manual switching control valve 3 is opened, chemicals can be injected into the well, and when the first manual switching control valve 3 is closed, the injection of chemicals into the well is cut off. A liquid feeding pump 4 is provided on the liquid inlet pipeline 1. The liquid inlet pipeline 1 is externally connected to a chemical source for transmitting chemicals. The liquid inlet pipeline 1 is also connected to a chemical storage tank 5 through a pipeline. A liquid level gauge is provided in the chemical storage tank 5. The connection position between the chemical storage tank 5 and the liquid inlet pipeline 1 is located between the liquid feeding pump 4 and the first manual switching control valve 3. The injection main line 2 is respectively connected to a gas production tree 7 through a plurality of injection branch lines 6. A variable frequency controlled high-pressure injection pump 8 is provided on the injection branch line 6.

[0041] It also includes an injection control system RTU11, which includes a CPU. The CPU is connected to an interface module and a wireless communication module. The interface module of the injection control system RTU11 is connected to the liquid feeding pump 4 and the frequency-controlled high-pressure injection pump 8 respectively through a transmission line. The injection control system RTU sends an operation signal to the liquid feeding pump 4 and the frequency-controlled high-pressure injection pump 8 through the transmission line. The injection control system RTU11 is also connected to a battery 12 and a solar photovoltaic panel 13 in sequence. The battery 12 and the solar photovoltaic panel 13 are connected through a solar power controller. The battery 12 is also connected to the liquid feeding pump 4 and the frequency-controlled high-pressure injection pump 8 respectively. The battery 12 supplies power to the liquid feeding pump 4 and the frequency-controlled high-pressure injection pump 8.

[0042] This embodiment only represents a preferred implementation of the injection device of the present invention for a gas well cluster well field. Any injection device designed with similar technical features to the present invention will fall within the protection scope of the injection device of the present invention for a gas well cluster well field.

[0043] Example 7

[0044] This embodiment provides an injection device for a gas well cluster well site, such as Figure 1 As shown, it includes a liquid inlet pipeline 1 and an injection main line 2. A first manual switching control valve 3 is provided at the connection between the liquid inlet pipeline 1 and the injection main line 2. The first manual switching control valve 3 serves as a switch for injecting the agent. When the first manual switching control valve 3 is opened, the agent can be injected into the well. When the first manual switching control valve 3 is closed, the injection of the agent into the well is cut off. A liquid feeding pump 4 is provided on the liquid inlet pipeline 1. The liquid inlet pipeline 1 is also connected to two agent storage tanks 5 through a pipeline to meet the required storage volume of the agent. A liquid level gauge is provided in each of the agent storage tanks 5. The connection position of the agent storage tank 5 and the liquid inlet pipeline 1 is located between the liquid feeding pump 4 and the first manual switching control valve 3.

[0045] Both medicine storage tanks 5 are connected to the sewage pipeline 9 to facilitate the discharge of impurities and sediments in the medicine, and a second manual switching control valve 10 is provided between the medicine storage tank 5 and the sewage pipeline 9. The second manual switching control valve 10 serves as the sewage switch of the medicine storage tank 5. When the second manual switching control valve 10 is opened, the impurities and sediments in the medicine storage tank 5 are discharged. When the second manual switching control valve 10 is opened, the impurities and sediments in the medicine storage tank 5 continue to accumulate.

[0046] The injection main line 2 is connected to the gas production tree 7 through multiple injection branch lines 6, that is, each gas production tree 7 corresponds to an injection branch line 6. Therefore, the injection device of this embodiment can inject multiple gas wells, improve the injection efficiency, and further improve the foam removal efficiency. A variable frequency controlled high-pressure injection pump 8 is provided on the injection branch line 6. When the first manual switching control valve 3 is opened, the variable frequency controlled high-pressure injection pump 8 draws the agent in the liquid inlet line 1 into the injection main line 2 and the injection branch line 6 in turn, and injects it into the well to achieve injection.

[0047] It also includes an injection control system RTU11, which includes a CPU. The CPU is connected to an interface module and a wireless communication module. The interface module of the injection control system RTU11 is connected to the liquid feeding pump 4 and the frequency-controlled high-pressure injection pump 8 respectively through a transmission line. The injection control system RTU sends an operation signal to the liquid feeding pump 4 and the frequency-controlled high-pressure injection pump 8 through the transmission line. The injection control system RTU11 is also connected to a battery 12 and a solar photovoltaic panel 13 in sequence. The battery 12 and the solar photovoltaic panel 13 are connected through a solar power controller. The battery 12 is also connected to the liquid feeding pump 4 and the frequency-controlled high-pressure injection pump 8 respectively. The battery 12 supplies power to the liquid feeding pump 4 and the frequency-controlled high-pressure injection pump 8.

[0048] The interface module of the injection control system RTU11 is respectively connected to a power detector, a pressure gauge, a flow meter, and a liquid level gauge. The liquid level gauge is used to monitor the storage amount of the agent in the agent storage tank 5. The power detector is connected to the battery 12. The power detector is used to detect the battery power. The feeding pump 4 and the frequency-controlled high-pressure injection pump 8 are both provided with a pressure gauge and a flow meter. The two pressure gauges are used to monitor the pressure of the feeding pump 4 and the frequency-controlled high-pressure injection pump 8. The two flow meters are respectively provided at the water outlet of the feeding pump 4 and the frequency-controlled high-pressure injection pump 8 to monitor the real-time displacement of the feeding pump 4 and the frequency-controlled high-pressure injection pump 8. The power detector, pressure gauge, flow meter, and liquid level gauge transmit the collected data to the CPU of the injection control system RTU through the interface module. The wireless communication module sends the collected data in the CPU to a mobile terminal (such as a mobile phone), so that the staff can monitor the data of the well site at any time.

[0049] This embodiment only represents a preferred implementation of the injection device of the present invention for a gas well cluster well field. Any injection device designed with similar technical features to the present invention will fall within the protection scope of the injection device of the present invention for a gas well cluster well field.

[0050] From the above content, it can be seen that the injection device of the utility model for gas well cluster well field uses solar panels for power supply, can realize continuous injection of multiple wells with one set of equipment, real-time monitoring of parameters, real-time adjustment of agent discharge volume, safety and environmental protection, etc., which has significant advantages over traditional manual operation.

Claims

1. An injection device for a gas well cluster field, characterized in that: The invention comprises a liquid inlet pipeline (1) and a main injection pipeline (2), wherein a first manual switching control valve (3) is provided at the connection between the liquid inlet pipeline (1) and the main injection pipeline (2), a liquid feeding pump (4) is provided on the liquid inlet pipeline (1), the liquid inlet pipeline (1) is further connected to a medicine storage tank (5) through a pipeline, the connection position between the medicine storage tank (5) and the liquid inlet pipeline (1) is located between the liquid feeding pump (4) and the first manual switching control valve (3), the main injection pipeline (2) is respectively connected to a gas production tree (7) through a plurality of injection branch pipelines (6), and a variable frequency controlled high-pressure injection pump (8) is provided on the injection branch pipeline (6).

2. The injection device for a gas well cluster field according to claim 1, characterized in that: The medicine storage tank (5) is connected to a sewage discharge pipeline (9).

3. The injection device for a gas well cluster field according to claim 2, characterized in that: Two medicine storage tanks (5) are provided, both of which are connected to a sewage pipeline (9), and a second manual switching control valve (10) is provided between the medicine storage tank (5) and the sewage pipeline (9).

4. The injection device for a gas well cluster field according to claim 1, characterized in that: The medicine storage tank (5) is provided with a liquid level gauge.

5. The injection device for a gas well cluster field according to claim 1, characterized in that: The system further includes an injection control system RTU (11), wherein the injection control system RTU (11) includes a CPU, and the CPU is connected to an interface module and a wireless communication module. The interface module of the injection control system RTU is connected to the liquid feeding pump (4) and the frequency conversion control high-pressure injection pump (8) through a transmission line, and the injection control system RTU sends an operation signal to the liquid feeding pump (4) and the frequency conversion control high-pressure injection pump (8) through the transmission line.

6. The injection device for a gas well cluster field according to claim 5, characterized in that: The injection control system RTU (11) is also connected in sequence to a battery (12) and a solar photovoltaic panel (13), and the battery (12) is also connected to a liquid feeding pump (4) and a variable frequency controlled high-pressure injection pump (8).

7. The injection device for a gas well cluster field according to claim 5, characterized in that: The injection control system RTU (11) is respectively connected to an electric quantity detector, a pressure gauge, a flow meter, and a liquid level meter. The liquid feeding pump (4) and the frequency conversion controlled high-pressure injection pump (8) are both provided with a pressure gauge and a flow meter. The electric quantity detector, pressure gauge, flow meter, and liquid level meter transmit the collected data to the CPU of the injection control system RTU (11) via the interface module. The wireless communication module of the injection control system RTU (11) transmits the collected data in the CPU to the mobile terminal.

8. The injection device for a gas well cluster field according to claim 7, characterized in that: The electric quantity detector is connected to the battery (12).

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