Natural gas well leakage collection system

Abstract

The utility model relates to the technical field of gas treatment, in particular to a natural gas well leakage collecting system which comprises a sealing cover used for covering the top of a sleeve, a collecting pipeline communicated with the top of the sealing cover and a combustion tank located at the tail end of the collecting pipeline, and a valve used for connecting and disconnecting the collecting pipeline is fixedly arranged on the collecting pipeline. A through hole is formed in the center of the sealing cover, the collecting pipeline penetrates through the through hole and is welded and fixed with the sealing cover, and a sealing piece is arranged at the welding position of the sealing cover and the collecting pipeline in a surrounding manner; according to the scheme, the natural gas well leakage collecting system can collect and process natural gas leaked out of a casing pipe gap, and the safety of the natural gas conveying process is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of gas processing technology, specifically a natural gas well leak detection system. Background Technology

[0002] Natural gas refers to combustible hydrocarbon gases, primarily composed of hydrocarbons, that are generated, migrated, and stored under pressure in underground structures under different geological conditions. A gas well is an artificial conduit connecting a gas-bearing reservoir to the surface, playing a crucial role in gas extraction by transporting natural gas from the reservoir to the surface and controlling the reservoir's structure. The overall structure of a natural gas well is multi-tiered and consists mainly of guide pipe, surface casing, technical casing, oil casing, and cement sheaths surrounding each casing layer. The guide pipe primarily transports natural gas, while the surface casing and technical casing mainly serve to secure the guide pipe.

[0003] In practical applications, gaps exist between the casing and the conduit, and between different levels of the casing. During natural gas transportation, a small amount of natural gas may leak out through these gaps. It is crucial to promptly address the leaked natural gas to prevent safety accidents. Existing treatment equipment primarily monitors or treats damaged conduits; therefore, there is an urgent need for equipment specifically designed to collect and treat natural gas leaking from casing gaps. Utility Model Content

[0004] This invention provides a natural gas well leakage detection system that can collect and process natural gas leaking from casing gaps, ensuring the safety of natural gas transportation.

[0005] This application provides the following technical solution:

[0006] A natural gas well leak detection system includes a sealing cap for covering the top of the casing, a detection pipe communicating with the top of the sealing cap, and a combustion tank located at the end of the detection pipe. A valve for switching the detection pipe on and off is fixedly installed on the detection pipe. A through hole is opened in the center of the sealing cap, the detection pipe passes through the through hole and is welded and fixed to the sealing cap, and a sealing element is provided at the welding position between the sealing cap and the detection pipe.

[0007] Beneficial effects:

[0008] 1. Effectively prevents safety accidents caused by natural gas leaks: By installing a sealing cap on the top of the casing and creating a closed environment, the system can effectively collect natural gas that seeps or leaks from gaps between casings at various levels, preventing it from directly flowing into the external environment and thus significantly reducing potential safety risks. Operators can open the solenoid valve through the control box, allowing the leaked natural gas to enter the combustion tank via the collection pipeline and be ignited and consumed completely, ensuring that the natural gas leak will not cause explosions or fires.

[0009] 2. A more compact structure enhances system performance and maintenance convenience: The sealing cap is welded to the collection pipeline, and a sealing element is installed around the weld to ensure high strength and airtightness of the connection, preventing natural gas leakage. This design not only simplifies the structure and reduces manufacturing costs but also facilitates daily inspection and maintenance. Staff can perform maintenance and replacement of critical components without frequent disassembly of the equipment, greatly improving the system's maintenance convenience and long-term stability.

[0010] Furthermore, as an improvement, the valve includes both a manual valve and a solenoid valve.

[0011] Beneficial Effects: The most significant benefit of this improvement is the provision of a dual-safety mechanism, ensuring high reliability and emergency response capabilities during natural gas leak handling. By installing both manual and solenoid valves, operators can use the solenoid valve for automated control during normal operations. In the event of solenoid valve failure or other emergencies, the manual valve serves as a backup, quickly shutting off the gas collection pipeline to prevent backflow or further leakage, thus avoiding potential safety incidents.

[0012] Furthermore, as an improvement, a control box electrically connected to the solenoid valve is also included.

[0013] Beneficial Effects: The most significant benefit of this improvement lies in the centralized management and intelligent control of the solenoid valves through the integrated control box, which greatly enhances the system's response speed and operational accuracy. Operators can complete the entire process with simple operations on the control box, reducing the need for manual intervention and lowering operational complexity and the probability of errors. Especially in emergencies, the control box can react quickly, shutting off the solenoid valves to prevent natural gas backflow or further leakage, providing enhanced safety. Furthermore, the control box can record and analyze historical data, helping operators better understand the system's operational status and optimize operating procedures.

[0014] Furthermore, as an improvement, a remote control that is wirelessly connected to the control box is also included.

[0015] Beneficial Effects: The most significant benefit of this improvement is the remote control of the solenoid valves and the entire data acquisition system via wireless remote control. This greatly simplifies operation for staff and enhances safety. In practical use, staff can control the opening and closing of the solenoid valves in real time without needing to be near the natural gas well or acquisition equipment. This is especially beneficial in emergencies, allowing for rapid response and timely closure of the solenoid valves to prevent further natural gas leaks or backflow, thus avoiding potential safety accidents. Furthermore, the introduction of wireless remote control reduces the complexity of on-site wiring and lowers the risks associated with cable failures.

[0016] Furthermore, as an improvement, a flow meter is fixedly installed on the collection pipeline, and the flow meter is electrically connected to the control box.

[0017] Beneficial Effects: The most significant benefit of this improvement lies in ensuring accurate monitoring and timely response to leaks by collecting natural gas flow in the pipeline in real time. After the flow meter is electrically connected to the control box, the collected flow data can be transmitted to the control box instantly. Operators can then view flow changes in real time through the control box and adjust the opening and closing of the solenoid valves according to the actual flow, ensuring effective treatment of the natural gas. When the flow rate increases abnormally, the system can react quickly, providing early warnings and taking measures to prevent potential safety hazards. Furthermore, the accurate data provided by the flow meter helps improve the working efficiency of the combustion tank, ensuring that all leaked natural gas is consumed. Attached Figure Description

[0018] Figure 1 This is an isometric view of Embodiment 1 of the natural gas well leakage detection system of this utility model;

[0019] Figure 2 for Figure 1 Top view;

[0020] Figure 3 for Figure 2 AA section view of the portion below the self-sealing cap;

[0021] Figure 4 for Figure 3 An enlarged view of position B in the middle. Detailed Implementation

[0022] The following detailed description illustrates the specific implementation method:

[0023] The markings in the accompanying drawings of the instruction manual include: sealing cap 1, collection pipe 2, combustion tank 3, conduit 4, sleeve 5, retaining ring 6, rubber ring 7, control box 8, manual valve 9, solenoid valve 10, and electronic flow meter 11.

[0024] Example 1

[0025] like Figure 1-4 As shown, the natural gas well leakage detection system includes a sealing cap 1 for sealing the top of the casing 5, a detection pipe 2 connected to the top of the sealing cap 1, a combustion tank 3 located at the end of the detection pipe 2, and a valve for switching the detection pipe 2 on and off fixedly installed on the detection pipe 2.

[0026] The natural gas well structure used in this embodiment is multi-tiered and consists mainly of a central conduit 4 and three casings 5 ​​of varying specifications. The conduit 4 primarily transports natural gas, while the casings 5 ​​mainly serve to secure the conduit 4. The casings 5 ​​provide installation conditions for the conduit 4 and also enhance the stability of the natural gas transport process. The natural gas well is buried underground.

[0027] The sealing cap 1 has a cover-like structure with a through hole in its center. The collection pipe 2 passes through the through hole and is welded to the sealing cap 1. Because the welded area is more prone to breakage and failure, a sealing element is provided around the welded area between the sealing cap 1 and the collection pipe 2. In this embodiment, the sealing element is a retaining ring 6 that is screwed to the conduit 4 or the sealing cap 1. A rubber ring 7, which is also annular in structure, is sandwiched between the retaining ring 6 and the sealing cap 1 or between the retaining ring 6 and the conduit 4. The rubber ring 7 enhances the stability of the connection between the retaining ring 6 and the conduit 4 or the sealing cap 1.

[0028] It also includes a control box 8 electrically connected to the solenoid valve 10; the control box 8 includes a box body and a controller and a display built into the box body, the valves include a manual valve 9 and a solenoid valve 10 fixedly installed on the collection pipeline 2 in sequence, an electronic flow meter 11 fixedly installed on the collection pipeline 2, and the controller is electrically connected to the solenoid valve 10, the electronic flow meter 11 and the display by wires respectively; wherein, the display is used to monitor and display the flow rate of natural gas in the collection pipeline 2.

[0029] A combustion tank 3 is a device used to burn combustible gases or liquids, commonly found in industries such as petroleum and chemicals. The combustion tank 3 includes a tank body and an ignition device installed inside the tank. The collection pipe 2 is connected to the air inlet located at the bottom of the combustion tank 3. Leaking natural gas is ignited and consumed completely after entering the combustion tank 3, preventing natural gas from leaking into the external environment and causing production safety accidents. In this embodiment, a secondary combustion tank 3 consisting of two sequentially connected combustion tanks 3 is provided. Operators select whether to open the second-stage combustion tank 3 based on the natural gas flow rate monitored in the collection pipe 2 on the display to ensure that the natural gas is completely consumed.

[0030] The specific application process is as follows:

[0031] In operation, natural gas seeping or leaking from the gaps between the various stages of the casing 5 is collected in a sealed environment formed by the sealing cap 1. At this time, the operator uses the control box 8 to open the solenoid valve 10, while the manual valve 9 remains open. The leaked natural gas enters the combustion tank 3 through the collection pipeline 2 and is ignited to consume it completely, preventing natural gas from leaking into the external environment and causing a production safety accident. The electronic flow meter 11 monitors the flow rate of natural gas in the collection pipeline 2 in real time. Based on the monitoring data, the operator selects whether to open the second-stage combustion tank 3 to ensure that the natural gas is completely consumed. It is worth noting that when the flame in the combustion tank 3 is observed to decrease, the solenoid valve 10 must be closed in time to cut off the natural gas and prevent backflow. In case of emergency such as a failure of the solenoid valve 10, the operator can also use the manual valve 9 to open or close the collection pipeline 2.

[0032] Example 2

[0033] The difference between this embodiment and Embodiment 1 is that it also includes a remote control that is wirelessly connected to the controller. The on / off state of the solenoid valve 10 is remotely controlled by the remote control, making it more convenient to operate.

[0034] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A natural gas well leakage detection system, characterized in that: It includes a sealing cap for covering the top of the casing, a collection pipe communicating with the top of the sealing cap, and a combustion canister located at the end of the collection pipe. A valve for switching the collection pipe on and off is fixedly installed on the collection pipe. A through hole is opened in the center of the sealing cap, the collection pipe passes through the through hole and is welded and fixed to the sealing cap, and a sealing element is provided at the welding position between the sealing cap and the collection pipe.

2. The natural gas well leakage detection system according to claim 1, characterized in that: The valves include manual valves and solenoid valves.

3. The natural gas well leakage detection system according to claim 2, characterized in that: It also includes a control box that is electrically connected to the solenoid valve.

4. The natural gas well leakage detection system according to claim 3, characterized in that: It also includes a remote control that is wirelessly connected to the solenoid valve.

5. The natural gas well leakage detection system according to claim 4, characterized in that: A flow meter is fixedly installed on the collection pipeline, and the flow meter is electrically connected to the control box.

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