What are the functions and scope of use of packers?

What are the functions and scope of use of packers?
A packer is a downhole tool mainly used to isolate oil and gas well casing or open wellbore annular space. Its main functions include:
Separate production layers to prevent fluid and pressure crosstalk and interference between layers.
Separate well killing fluid and production fluid.
Meet the relevant regulations for oil (gas) production and well repair operations.
Preserving the sealing fluid in the casing annulus plays a role in protecting the casing and ensuring safe production.
The scope of use of packers is very extensive, including but not limited to the following aspects:
Oil and gas field development: In the process of oil and gas field development, packers are widely used in various links such as drilling, cementing, testing, completion, water injection, and downhole operations to improve the efficiency and safety of oil and gas extraction.
Water treatment: In the field of water treatment, packers are mainly used to isolate different water qualities and prevent contamination and cross contamination of water quality.
Chemical industry: In the field of chemical industry, packers are mainly used to separate and isolate different substances, as well as to isolate between different temperatures. Packers are widely used in the chemical industry, such as separation towers, reactors, and transportation pipelines.
Biopharmaceuticals: In the field of biopharmaceuticals, packers are mainly used to isolate different gases and pressures, in order to protect the laboratory environment and ensure the accuracy and reliability of experiments. The application of packers in the field of biomedicine includes pharmaceutical production, laboratory research, etc.
In addition, packers are often used in various electronic systems, such as communication equipment, power supply, measuring instruments, and amplifiers. In these systems, packers can effectively isolate circuits, protecting their stability and reliability.
In summary, packers have a wide range of applications in fields such as petroleum, natural gas, water treatment, chemical engineering, biomedicine, and electronics. With the continuous development and innovation of technology, the function and performance of packers are also constantly improving, providing more reliable and effective guarantees for the production and development of various industries.