Sealing with pressure is a special technology, which is widely used in the mining, storage, transportation and processing of oil, gas, coal and other industries. Its main role is to drill holes and form pore apertures in structures such as metal pipes, equipment and containers for the transportation, reaction, treatment and monitoring of liquids or gases.

There are many kinds of sealing with pressure, which can be divided into the following categories according to the different characteristics of the hole diameter, hole distance, hole number, shape and position of the hole:

Single point reaming: Single point reaming refers to the use of a single gear or gear system for opening holes, there are two types, namely manual single point reaming and mechanical single point reaming. Manual single point reaming is usually used in small aperture and thin-walled steel pipe, simple operation, low efficiency, but low cost; Mechanical single point reaming is suitable for large aperture and thick wall steel pipe, which has high efficiency and high precision, but the cost is higher.

Second, multi-point reaming: Multi-point reaming refers to the use of decentralized gear system (such as drill) in a specific position to open holes, and the corresponding number of gears can be adjusted according to demand. Compared with single point reaming, multi-point reaming has fast drilling speed, high precision and small sheet deformation, and is often used on structures and pressured surfaces.

Hot spot reaming: hot spot reaming refers to the reaming method of heat treatment through laser, plasma and explosion energy generator, the advantage of this method is that it can reaming any shape and size, fast speed, high precision, is a more ideal reaming method, but there are also health and cost issues to consider.

Four, hydraulic reaming: hydraulic reaming is the use of high-pressure water impact on the surface of the object to achieve the purpose of opening holes. Due to the instantaneous impact of water and high speed, the method is suitable for wear-resistant and hard steel plate and iron plate. At the same time, the water pressure can be controlled, and various specifications of the aperture can be expanded.

Explosive reaming: Explosive reaming is to gather energy such as explosives, high-pressure gas or compressed air at a point to form an explosive force, and instantaneously destroy the target object to achieve opening. This method is often used in rock mining and building construction, but it is dangerous and expensive to operate.

Six, water jet reaming: water jet reaming is a way to open the hole with high pressure water flow, its advantage is that it can expand the hole in a straight line, the drilling speed is fast and the blank is clean, and it is also suitable for the reaming of different materials.

In short, with the development of science and technology and the continuous growth of demand, the types and technologies of pressure openings are also constantly innovating and updating. Different opening methods have advantages and disadvantages, and need to be selected according to the actual situation in practical application.

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