Sealing with pressure is an important engineering technology, which is commonly used in the process of pipeline construction, maintenance and repair in oil, gas and other energy industries. The main purpose of pressure sealing technology is to achieve local closure in the pipeline system, prevent the leakage of the medium or the entry of external substances, and ensure the normal operation of the pipeline. This paper will focus on the core technology of plugging with pressure, including plugging tools, plugging technology, plugging materials, etc., in order to provide reference for engineers and technicians in related fields.

The core technology of sealing with pressure mainly includes the following aspects:

Plugging tool: Plugging tool is one of the key equipment to achieve plugging with pressure. Common plugging tools include plugging balls, plugging devices, plugging belts, etc. The ball is usually made of rubber or polymer material, which has good sealing properties and pressure resistance, and can form a temporary closure inside the pipe. A sealer is an inflatable or expellable device that seals the inside of a pipe by controlling its internal pressure. Sealing tape is a device that is wrapped around the outside of the pipeline to achieve the sealing effect, and is often used for leak repair and sealing outside the pipeline.

Plugging process: Plugging process is the key link in the process of plugging with pressure, including the preparation before plugging, the specific steps of plugging operation, and the monitoring and detection after plugging. Before plugging, the pipeline needs to be inspected and evaluated in detail to determine the location, type and size of the plugging. The specific steps for plugging include installing plugging tools, verifying sealing performance, monitoring and controlling plugging operations. After plugging, strict monitoring and testing should be carried out to ensure that the plugging effect meets the requirements.

Sealing materials: Sealing with pressure involves a variety of sealing materials, including rubber, polymer, metal, etc. These materials usually have good sealing properties, pressure resistance and corrosion resistance, and can adapt to complex engineering environments and media conditions. When selecting the sealing material, it is necessary to consider the characteristics of the pipeline medium, the conditions of the working environment, the requirements of the sealing position and other factors to ensure that the appropriate sealing material is selected.

In the actual engineering application, the sealing technology with pressure needs to consider the structural characteristics of the pipeline, the conditions of the engineering environment, the nature of the medium and other factors, select the appropriate sealing tools, sealing technology and sealing materials, and realize the efficient sealing operation. At the same time, it is also necessary to pay attention to the monitoring and testing of the plugging operation, find and solve problems in time, and ensure the reliability and durability of the plugging with pressure.

In short, the core technology of sealing with pressure involves many aspects, including sealing tools, sealing processes, sealing materials and so on. Through reasonable selection and application of these core technologies, the closure of the pipeline system can be effectively realized, and the smooth progress and normal operation of the project can be guaranteed. I hope the introduction of this article can be helpful to the technical people in related fields.