Scientific Maintenance: The Key to Extending the Service Life of Pressure Sealing EquipmentDuring an annual maintenance inspection of an offshore oil platform, engineers discovered that a pressure-sealing fixture on a critical pipeline had undergone micro-scale deformation. Thanks to the comparison of lubrication data from their daily maintenance records, they were able to predict this potential failure 48 hours in advance. In industries such as petroleum, chemical engineering, and natural gas where continuous production is carried out, the pressure-sealing technology is the lifeline for conducting pipeline maintenance without interrupting the flow. This technology enables the safe completion of leak sealing, renovation, or replacement operations while keeping the pipeline system at its normal operating pressure. Just like any sophisticated equipment, the long-term reliability and lifespan of the pressure-sealing system are almost entirely dependent on a scientific and rigorous maintenance system. Ignoring maintenance can lead to the failure of even the most advanced technology at critical moments; however, adhering to preventive maintenance can extend the performance and value of the equipment by several times. 01 Core Component: The Foundation of Lifespan and the Target of Maintenance A complete pressure-sealing system has its lifespan determined by the conditions of several key components. These components are the primary focus of maintenance work. First, there are the power and execution units, with the pressure-bearing hole-opening machine as a representative example. It is a key equipment for mechanically cutting holes on running pipelines. The accuracy of its main shaft, drive rod, and gearbox directly determines the success or failure of the operation. Every rotation and cutting process involves wear, and lubrication and calibration are the lifelines of it. The next part is the sealing and pressure-bearing unit, which includes various clamps, plugs, and sealing components. The clamps must have sufficient strength and rigidity to withstand the internal medium pressure and the external force of injecting the sealing agent, preventing deformation that could lead to sealing failure. Finally, there is the sealing material system, namely the special sealant. It is not an ordinary material; instead, it is a specialized material that needs to be carefully selected based on the temperature, pressure, and chemical properties (acidic, alkaline, etc.) of the medium. Its performance will deteriorate over time and in different usage environments. 02 Daily Maintenance: The First Line of Defense Against Failures Daily maintenance is the most cost-effective and effective strategy for extending the lifespan. It focuses on the routine procedures before and after each operation, aiming to eliminate immediate hazards. After each operation, a thorough cleaning must be carried out immediately. Remove the oil stains, residual media and metal debris on the outside of the equipment. For the hole-making machine, especially clean off the pipe material sleeves (commonly known as "saddle blocks") cut off during the operation to prevent them from jamming the internal mechanism. After cleaning, conduct a functional inspection. Check for any scratches on the exposed part of the spindle of the hole-making machine, and ensure that the guide device of the blocking rod is in good condition. Manually test whether the operating mechanisms such as the rack handle are smooth. Any sticking could indicate the presence of impurities or initial wear inside. Then, the key operation points are lubricated on a basic level. Appropriate amounts of lubricating grease are applied at the threaded connections and the rotating joint of the handle to reduce frictional losses. After completing these steps, the equipment is placed in a dedicated protective box, and dust-proof and impact-resistant measures are taken for components such as the precision shaft system. 03 Deep Maintenance: Periodic Repair and Performance Regeneration If daily maintenance is like "washing the face", then deep maintenance is like "comprehensive check-up and adjustment". It is carried out according to fixed cycles or operation frequencies, aiming to restore the performance of the equipment. The key lies in thorough disassembly and lubrication. According to the equipment requirements, it is usually necessary to completely dismantle the core equipment such as the hole-making machine once every 30 operations or every 6 months. Each bearing, gear, and slider should be thoroughly cleaned, and high-performance lubricating grease should be re-added. This can effectively prevent permanent wear caused by dry friction. The systematic replacement of sealing elements is a mandatory requirement. Rubber or polymer components such as gaskets and O-rings will naturally age. Especially after exposure to high-temperature operations (such as steam pipelines) or contact with corrosive media, regardless of their appearance, they must be replaced as a whole. Because their elasticity and sealing performance have irreversibly declined. Precision calibration and structural inspection are equally crucial. Check whether the mating surfaces of the fixtures are smooth and whether there are any micro-deformations caused by repeated pressure. Verify the accuracy of the measuring tools, as measurement errors in the field are a common cause of excessive fixture gaps and subsequent failure of the seal. 04 Scientific Storage: Fortifications Against Time's Erosion The wear and tear of equipment during storage is often overlooked. A scientific storage strategy can keep the equipment in a "sleep" state during non-use periods, preventing performance degradation. Environmental control is the primary principle. The equipment should be stored in a dry and well-ventilated indoor environment, avoiding direct sunlight and extreme temperatures. High temperatures will accelerate the aging of rubber seals, causing them to harden and crack. Moisture will lead to rusting of metal components, affecting the accuracy of movement. For leak sealing tools with rubber components (such as internal sealing leak sealing tapes), before storage, talcum powder should be applied to the rubber surface to prevent damage caused by long-term adhesion.