Pressure plugging is a technique commonly used in oil, gas and chemical industries. Its main purpose is to repair, modify or replace pipelines without stopping fluid production. In order to ensure the smooth progress of the sealing construction with pressure, adequate preparation work must be carried out. This paper will elaborate the construction preparation with pressure plugging from many aspects, including management, technical preparation, equipment selection, personnel training and so on.

#### 1. Steady management

Stability is an important factor in the construction of sealing with pressure. The construction unit shall formulate a detailed stability management plan, and conduct a risk assessment before construction to identify potential hazard sources and risk factors. The following are the key links of stability management:

1. ** Risk assessment ** : Conduct a comprehensive risk assessment before construction to analyze possible risks, including high-pressure fluid leakage, equipment failure, casualties, etc. According to the evaluation results, formulate the corresponding emergency plan.

2. ** Stability training ** : Conduct stability knowledge training for all personnel involved in construction to ensure that they understand the basic principle, operating process and precautions of sealing with pressure. In particular, how to identify and deal with emergencies in the construction process should be emphasized.

3. ** Personal Protective Equipment ** : Ensure that all construction personnel wear appropriate personal protective equipment (PPE), such as hats, glasses, earplugs, protective clothing and gloves, to reduce the potential risk of injury.

4. ** Stability supervision ** : During the construction process, there should be a special stabilizer to supervise the whole process to ensure that all stability rules and regulations are complied with. Once violations of stable operating procedures are found, they must be stopped and rectified immediately.

#### Technical preparations

Technical preparation is an important link in the construction of sealing with pressure. The quality of technical preparation directly affects the effectiveness of construction.

1. ** Construction plan formulation ** : According to the specific construction tasks and site conditions, develop a scientific and reasonable construction plan. The construction scheme shall include the selection of the sealing method, the design of the construction process, and the listing of the required materials and equipment.

2. Selection of sealing technology ** : According to the diameter of the pipeline, pressure, fluid properties and other factors, choose the appropriate sealing technology. Common plugging methods, such as mechanical plugging, air bag plugging, and chemical plugging, need to be comprehensively evaluated according to the actual situation.

3. ** Construction process design ** : The construction process should list in detail the operating steps of each step, including preparation, equipment installation, plugging implementation, post-inspection, etc. The person in charge of each link should be clear and ensure coordination.

4. ** Emergency plan formulation ** : In the construction plan, it is necessary to formulate a detailed emergency plan for various possible emergencies, such as equipment failure, leakage, etc., to formulate corresponding treatment measures to ensure rapid response in emergency situations.

#### Three, equipment selection

The selection of equipment directly affects the construction effect of sealing with pressure. The construction team needs to select appropriate equipment and make relevant preparations according to the actual situation.

1. Prepare the list of equipment ** : Before construction, make a list of required equipment, including plugging equipment, pressure monitoring equipment, leak detection equipment, tools and materials, etc., and ensure the integrity and reliability of the equipment.

2. Inspection and maintenance of ** Equipment ** : All equipment must be inspected in detail before use to ensure that it is in good working condition. For old equipment, necessary maintenance and maintenance should be carried out to prevent failure during construction.

3. Commissioning of equipment ** : Before the formal construction, the key equipment is debugged to ensure that it can run smoothly. A pressure test should be carried out during commissioning to ensure that the plugging equipment can withstand the expected working pressure.

4. ** Preparation of spare parts and tools ** : Considering the possible equipment failure during the construction process, it is necessary to prepare relevant spare parts and tools in advance for timely replacement and repair to ensure the smooth construction.

#### IV. Personnel training

Personnel is the core of sealing construction with pressure, and good training can significantly improve the stability and efficiency of construction.

1. ** Common technical training ** : For the technical personnel responsible for sealing with pressure, it is necessary to provide common technical training to ensure that they are familiar with the principle, operation process and maintenance knowledge of the sealing equipment.

2. ** Operating procedures training ** : Operators must be familiar with the operating procedures of the construction site, understand the work requirements and precautions of each link, and ensure standardized operation during the construction process.

3. ** Emergency handling training ** : Regularly carry out emergency handling training, simulate the handling process of emergencies, and improve personnel's emergency response ability. Through the drill, each participant can be familiar with the operation steps of the emergency plan.

4. ** Team cooperation training ** : sealing with pressure often requires the cooperation of multiple departments, the construction unit should strengthen the team cooperation training to ensure the flow of information and work cooperation between various posts, and improve the construction efficiency of the whole team.

####. Preparation for the construction site

The preparation work of construction site is the foundation to ensure the smooth construction of sealing with pressure.

1. ** Site survey ** : Before construction, the project leader should conduct a comprehensive survey of the construction site to understand the site environment, pipeline layout, surrounding facilities and other information in order to formulate a suitable construction plan.

2. ** Site layout ** : According to the construction plan, rationally arrange the construction site, including the placement of equipment, the storage of materials, the setting of channels, etc., to ensure the smooth progress of construction personnel and construction.

3. ** Signs and warnings ** : Set up clear signs and warning slogans at the construction site to remind construction personnel and past personnel to pay attention to prevent accidents.

4. ** Fluid monitoring ** : Before construction, the fluid in the pipeline should be monitored to ensure that the pressure and flow of the fluid are within a stable range to provide stable protection for sealing with pressure.

#### Coordination and communication before construction

Before the construction of sealing with pressure, the coordination and communication of the relevant parties is crucial to effectively reduce the misunderstanding and conflict in the construction.

1. ** Hold a coordination meeting ** : The construction unit shall hold a coordination meeting in advance, invite relevant departments and personnel to participate, clarify their respective responsibilities and tasks, and ensure information sharing and consistent goals.

2. ** Develop a communication mechanism ** : Establish an effective communication mechanism to ensure that all parties can exchange information in a timely manner during the construction process, so as to solve problems in a timely manner.

3. ** Determine the contact person ** : In the construction process, designate a special contact person who is responsible for communication and coordination between the parties to ensure the timely transmission of information.

4. ** Record meeting minutes ** : After the meeting, a written summary of the contents discussed and decisions made at the meeting will be distributed to all relevant personnel in a timely manner to ensure that all parties can implement the meeting as planned.

#### Conclusion

The construction preparation work with pressure sealing involves many aspects, from stability management, technical preparation, equipment selection, personnel training, construction site preparation and coordination and communication, each link is crucial. Full preparation of these can ensure the stability, efficiency and smooth operation of the pressure sealing construction. In the actual construction process, the construction team should always be vigilant, pay attention to the dynamics of the site, and adjust and improve the construction plan in time to cope with various possible challenges. Through careful preparation and rigorous execution, the sealing operation with pressure can successfully achieve the repair and maintenance objectives under the premise of ensuring stability, contributing to the sustainable development of the industry.