### Introduction

Pressure plugging technology, also known as pressure plugging operation, is mainly used in the exploitation process of oil, natural gas and other resources. With the increasing demand for energy in the world, traditional mining methods are facing more and more challenges, especially in the aspects of stability, economy and environmental protection. The emergence of pressure plugging technology has brought new opportunities to the industry and become an important means to improve operational efficiency and reduce the risk of accidents. In this paper, the definition, development history, technical principle, application field and future development trend of sealing with pressure are discussed in detail.

#### I. Definition of Pressure plugging

Pressure plugging is a type of plugging operation that is performed under high pressure conditions and is commonly used in the repair and maintenance of oil and gas Wells and gas Wells, as well as the drilling process of new Wells. The basic principle is to prevent oil and gas leakage and well fluid overflow by applying certain pressure at the wellhead, so as to ensure the stability and effectiveness of the operation. Pressure plugging technology can be used in high-pressure environments and ensures efficient resource extraction without affecting the surrounding environment.

#### II. Development history of pressure plugging

The origin of pressure plugging technology can be traced back to the 1950s, and it was originally mainly applied to wellhead plugging in the oil industry. With the continuous progress of technology, especially the breakthrough in the field of material science and engineering technology, pressure sealing technology has gradually developed into a mature engineering technology.

1. Early development (1950s - 1970s) **

In this period, the pressure sealing technology mainly relied on simple mechanical equipment, and the technical level was low. Although the basic plugging function can be achieved, there are many hidden dangers and efficiency problems.

** Technological Innovation (1980s - 1990s) **

In the 1980s, with the rapid development of computer technology and sensor technology, the technical level of pressure plugging has been significantly improved. In particular, important progress has been made in pressure monitoring, data acquisition and automated control. The technological innovation in this stage has greatly improved the stability and efficiency of the plugging operation with pressure.

3. ** Modern application (early 21st century to date) **

With the increase of energy demand and health awareness in the world, the application of pressure sealing technology in oil and gas production is more and more extensive. Modern pressure plugging equipment is highly automated and automated, enabling real-time monitoring and data analysis, greatly improving the economy of the job.

#### Technical principle of sealing with pressure

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

1. ** Pressure monitoring **

Pressure monitoring is the key to ensure the stability of the operation in the pressure plugging operation. Through high-precision pressure sensor, real-time monitoring of pressure changes in the well, timely adjustment of the plugging plan, to avoid accidents caused by excessive pressure.

2. ** Sealing material **

The materials used for pressure sealing must have the characteristics of high strength, high pressure resistance and corrosion resistance. Common sealing materials include polymers, cement, metal alloys, etc. These materials are used in high-pressure environments to prevent oil and gas leaks and well fluid spills.

3. ** Sealing technology **

Efficient sealing technology is at the heart of sealing with pressure. Modern pressure sealing equipment often uses a dual seal design combined with advanced sealing materials to ensure sealing performance in high-pressure environments and reduce the risk of leakage.

4. ** Automatic control **

Modern pressure sealing equipment mainly adopts automatic control system, which can collect and analyze operation data in real time, and automatically adjust operation parameters, so as to improve the flexibility and efficiency of operation.

#### IV. Application fields with pressure plugging

The application field of pressure sealing technology is very wide, mainly including the following aspects:

** Oil and gas extraction **

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In the process of oil and gas production, pressure sealing technology is widely used in wellhead sealing and maintenance. In the wellhead operation, it can effectively prevent oil and gas leakage, improve the stability and economy of operation.

2. ** Underground work **

Pressure plugging technology can also be applied to downhole operations, such as the repair and replacement of downhole equipment. With pressure plugging, downhole equipment can be maintained without affecting the pressure in the well, reducing operational risks.

3. ** Sewage treatment ** In the field of sewage treatment, pressure sealing technology also plays an important role. By applying pressure in the treatment process, the efficiency of sewage treatment can be improved and the treatment cost can be reduced.

4. ** Geothermal and energy development **

With the rise of renewable energy, geothermal and energy development has been paid more and more attention. In geothermal and energy development, pressure plugging technology can effectively control the pressure in the well and improve the efficiency of geothermal and resource exploitation.

5. ** Mining **

In the mining industry, pressure sealing technology can be used for mine closure and maintenance to ensure the stability of mine operations and reduce the possibility of accidents.

#### The future development trend of sealing with pressure

With the continuous progress of science and technology and the change of market demand, pressure plugging technology will usher in new development opportunities in the following aspects:

1. ** Automation **

With the development of artificial automation, Internet of Things and other technologies, pressure plugging technology will develop in the direction of automation. In the future, pressure plugging equipment will have a higher level of automation, enabling remote monitoring and automatic decision making, improving operational efficiency and stability.

2. ** Hygiene **

With increasingly stringent health regulations, pressure sealing technology will pay more attention to environmental protection. During the operation, more hygienic materials and processes will be adopted to reduce the impact on the environment.

3. ** Multi-field integration **

The application field of pressure sealing technology will gradually expand, and it may be integrated with other industries in the future. For example, in the fields of new energy development and environmental protection, pressure plugging technology will play a greater role.

4. ** Application of new materials **