Pressure plugging is a common technical method used to control pressure or fluid in a pipe, container, or wellbore. It plays an important role in many fields, especially in the petroleum industry, chemical process, hydraulic engineering and geological exploration. In this article, I will introduce the principle, application and related equipment of pressure plugging in detail.

First, the principle and mechanism of pressure plugging

A pressure plug is the introduction of a plug to prevent the flow of fluid or gas in a pipe, container, or wellbore. It can be used in a variety of scenarios, such as dealing with leaks, maintenance and overhaul, pressure testing, and more. The principle of sealing with pressure is based on the following key points:

1. Choice of sealer: The sealer is usually a plastic material, such as a capsule, elastic ball or expansion tube. The choice of sealer is based on the specific needs of the application, including temperature, pressure, fluid properties and the shape of the sealer area.

2. Introduction of the plug: The plug is usually injected through the entrance of the pipe or wellbore. In some cases, the plug can also be delivered to the target area by special equipment or tools.

3. Expansion and fixation of the sealer: Once the sealer enters the target area, it will expand and fill the space to achieve the effect of sealing. Commonly used sealers are flexible to accommodate pipes, containers or Wells of different shapes and sizes.

4. Fixing of the sealer: In order to ensure the stability and pressure resistance of the sealer, sometimes additional measures need to be taken to fix the sealer, such as the use of fixtures, bolts or adhesives. This helps prevent the plug from loosening or moving under high pressure or prolonged action.

Second, the application field with pressure sealing

Pressure plugging is widely used in the following fields:

1. Petroleum industry: In the process of oil production and transmission, pressure plugging is used to control the pressure and fluid flow of oil Wells. It can be used to plug leaks in the wellbore, adjust fluid pressure and flow in the wellbore, and perform pressure testing and maintenance.

2. Chemical process: In chemical plants and pipeline systems, pressure plugging is used to control the flow of fluids and maintain process equipment. It can be used to plug leaks, isolate pipeline segments for repairs, and detect and test the sealing performance of systems.

3. Hydraulic engineering: In projects such as DAMS, sluice gates and water pipes, pressure plugs are used to control water flow and stop water leakage. It can be used to plug defects in sluice gates, repair leakage points in water pipes, and plug cracks in DAMS.

4. Geological exploration: In geological exploration and mining, pressure plugging is used to control water flow and gas in the shaft or tunnel. It can be used to plug underground water sources, prevent groundwater from entering Wells or tunnels, and isolate fluids between different formations.

3. Equipment and tools with pressure plugging

In order to achieve a pressure plug, some special equipment and tools need to be used. Here are some common pressure plugging devices:

1. Plugging capsule: This is an inflatable or liquid-filled capsule that can adjust the size and shape of the plugging material as needed. It is commonly used in smaller diameter pipes and shafts.

2. Elastic ball: This is a rubber or plastic ball that can be injected through the entrance of a pipe or wellbore. Once the sphere enters the target area, it expands inside the pipe to achieve the effect of sealing.

3. Expansion tube: This is an expandable pipe component that can be expanded by injecting liquid or gas. Once the expansion tube expands, it fills the space inside the tube to achieve the sealing effect.

4. Plugging fixture: This is a fixture or bracket used to fix the plugging material to prevent it from loosening or moving under high pressure or prolonged action.

In SUMMARY:

As an important technical method, sealing with pressure has a wide range of applications. It can be used for pressure control, leak treatment, maintenance and overhaul, pressure testing and many other aspects. Through the selection of suitable sealers and the use of appropriate equipment and tools, pressure sealing can effectively control the pressure and fluid flow to ensure the normal operation and stability of the process system.

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