Full Analysis of Pressure-Resistant Sealing and Opening Equipment: Functional Differences and Technical Key PointsIn the field of pipeline maintenance, these two technologies are quietly transforming the traditional operation methods and ensuring the safety and efficiency of energy transportation. In modern industrial production, the pipeline systems in industries such as petroleum, natural gas, and chemical engineering are like the vascular network of the human body, undertaking crucial transportation tasks. And the technologies of pressure-opening holes and pressure-sealing techniques are like precise interventional medical surgeries, enabling the modification and repair of pipelines without causing flow interruption or production halt. Although these two technologies often work together, their equipment configurations, working principles and application scenarios have fundamental differences. This article will deeply explore the differences between pressure-sealing and opening equipment, and analyze their technical key points and development trends. 01 The fundamental differences in the functional positioning of the equipment The core function of the pressure opening equipment is to create openings on the pressure pipeline, while the core function of the pressure sealing equipment is to block the flow of the medium inside the pipeline. This is the most fundamental difference between the two. The pressure-bearing opening equipment is specifically designed for creating new branches or process openings on operating pipelines, enabling continuous pipeline renovation. It can complete the drilling operation while the pipeline is under pressure, and ensure that the medium does not leak. This technology is widely applied in scenarios such as pipeline system expansion and process modification. In contrast, the pressure-sealing equipment is used to isolate pipeline sections for maintenance, replacement or renovation operations. It blocks the flow of the medium through mechanical means, creating a safe working environment. The application practice of Xinjiang Oilfield Company has shown that this technology can effectively prevent resource waste and environmental pollution, and at the same time reduce the economic losses of downstream users. 02 Comparison of Working Principles and Technical Paths The working mechanism of pressure-bearing hole-opening equipment Pressure-bearing hole-opening equipment is usually composed of a hole-opening machine, a connecting box, cutting tools, and clamping valve, etc. Its working process mainly consists of the following stages: The equipment is first connected to the pipeline via flanges or welding, and then the clamp valve and the hole-making machine are installed. The clamp valve is in the open position, and the hole-making machine is activated to drive the cutting tool to rotate, gradually cutting into the pipeline wall to complete the hole-making operation. During the hole-making process, the pipe wall material cut off by the tool (referred to as "saddle blocks") is retained inside the tube cutter. As the tool is withdrawn, it prevents these blocks from falling into the pipeline and causing blockage. This process requires extremely reliable sealing performance of the equipment, and the balance system must remain stable to prevent medium leakage and ensure smooth cutting. The working mechanism of the pressure-sealing equipment The pressure-sealing equipment mainly consists of components such as the sealing device, the hydraulic control system and the sealing head. Its working process is more complex: The plug device enters the pipeline through the opening, then unfolds the sealing element (such as a rubber cup or an expandable cylinder), and closely adheres to the inner wall of the pipeline, forming a physical barrier to block the flow of the medium. Based on the different sealing principles, the sealing technology can be mainly divided into two categories: the expansion cylinder type sealing and the rubber cup type sealing. The expansion tube type plugger achieves sealing by causing the rubber tube to expand radially within the pipe, while the cup-type plugger achieves sealing through a similar piston-ring type sealing element. 03 Analysis of Differences in Equipment Structure and Key Components The core component of the drilling equipment The key components of the hole-making equipment include the main body of the hole-making machine, the transmission system, the cutting tools and the sealing system, etc. · Main body of the hole-making machine: Provides torque and feed power, usually driven by mechanical or hydraulic means. · Tooling System: The design of the tube cutter is particularly crucial as it directly affects the quality and efficiency of the hole opening process. The new hole-opening tool utilizes high-strength hard alloy materials and a unique tooth arrangement to ensure smooth cutting and high efficiency. · Balance device: The advanced drilling machine is equipped with a dual balance system. Even if one system fails, it can immediately switch to the backup system to ensure the safety and reliability of the drilling process. The core component of the blocking equipment The key components of the blocking equipment mainly include the main body of the blocking device, the blocking head, the sealing elements and the control system: · Sealing head design: The new sealing head has abandoned the traditional lip-sealing method and adopted a multi-seam sealing structure instead. This solves the problem of difficulty in sealing the pipeline under both high and low pressure conditions. · Sealing material: Select the appropriate sealing material based on the properties of the medium and the working conditions. For example, rubber gaskets or expansion tubes can be chosen. The temperature resistance, corrosion resistance and sealing performance of these materials directly affect the sealing effect. · Dust collection device: To prevent the iron filings generated during the opening process from damaging the sealing elements, the advanced sealing device is equipped with a special dust collection device, which can push the iron filings away from the sealing area and avoid causing damage to the sealing elements. 04 Distinction between application scenarios and operation procedures Typical application scenarios of pressure-bearing hole opening The pressure-bearing hole opening technology is mainly applicable to the following scenarios: · Pipeline branch connection: Add side branches to the existing pipeline without requiring a shutdown.