Pressure-sealing technology: Autonomous control system leads to new changes in pipeline operationsPipes are like the blood vessels of an industrial society, and the technology of pressure-sealing has become a crucial breakthrough for performing "surgery" without disrupting the "blood flow". In modern industrial society, pipeline transportation systems for oil, gas, and other substances are like the blood vessel network of the human body, maintaining the national energy security and economic lifeline. Traditional pipeline maintenance operations often require cumbersome steps such as shutdown, emptying, and cleaning, resulting in significant economic losses and energy waste. Pressure-sealing technology - this advanced technology that enables maintenance, renovation and emergency repairs without interrupting the pipeline flow, is completely transforming this situation. The core of this technology lies in its own intelligent development of the control system. This enables pressure-sealing operations to evolve from simple tools to autonomous decision-making intelligent systems. 01 Technological Innovation: From Traditional Handwork to Intelligent Control The evolution of pipeline maintenance technology is a path from roughness to precision, and from manual operation to intelligent systems. In the early days of pipeline operations, there was a difficult choice to make: either endure huge loss of production downtime or take the risk of conducting simple treatments. Although the traditional pressure-bearing hole opening and sealing technology is a significant advancement, it still has some limitations such as complex process, long operation time, and limited safety. The emergence of in-line high-pressure intelligent plugging technology has overcome these limitations. It has broken through the structural limitation of the plugging device that must enter the pipeline through an opening, making the process simpler, reducing the downtime loss, and increasing the plugging pressure. The qualitative leap of this technology lies in the introduction of the built-in control system, which enables the sealing equipment to have the capabilities of autonomous perception, analysis and execution. 02 Nervous Center: The Architecture and Composition of the Control System The automatic control system for pressure sealing is a highly precise and complex integrated system. It consists of multiple subsystems that work together to form the "central nervous system" of the sealing equipment. This system mainly consists of four modules: control execution, communication transmission, power supply guarantee, and emergency handling. Together, they ensure the accuracy and reliability of the sealing operation. The control execution system is the "brain" of the plugging operation, responsible for signal processing and command issuance. The electrically controlled integrated plugging device developed by Bohai Drilling can enable operators to precisely complete all operations such as injection and plugging, retrieval, and withdrawal simply by pressing the electric control button. The communication transmission system is the "nerve" of the sealing equipment, connecting the control end and the execution end. The high-pressure intelligent sealing device inside the pipe is controlled by ultra-low frequency electromagnetic pulse signals (ELF). This type of signal has strong penetrating power and can stably transmit instructions underground or within the pipeline. The power supply system provides the energy source for the sealing operation. The micro-hydraulic system is the power core of the sealing device. It is activated under the control of ELF signals to achieve braking and sealing. The emergency handling system serves as the "safety rope" for work operations. When abnormal parameters or emergencies are detected, the system can automatically activate the emergency plan to achieve fault-safe protection. 03 Key Technical Feature: The Core Breakthrough of Intelligent Control The advanced nature of the pressure-sealing automatic control system lies in the fact that it integrates technological breakthroughs from multiple fields, achieving a leap from "mechanization" to "intelligence". Adaptive control capability is the primary indicator of system intelligence. By adopting a control strategy based on fuzzy PID, the coupling characteristics among the various axes have been eliminated, thereby improving the control accuracy. Precise positioning and attitude adjustment capabilities ensure the accuracy of the sealing. Through the 6-degree-of-freedom mechanism in space, the positions and orientations of the sealing blind plates at the water injection end and the pressure test end can be fully adjusted and controlled in all directions. Intelligent vibration reduction and stability control have significantly enhanced operational reliability. By establishing a nonlinear mapping relationship between the tail pressure and vorticity of the plug and the angle of the aileron using RBF neural networks, the internal flow field pressure in the pipe is precisely controlled through an active control method. The integrated design eliminates the limitations of traditional technologies. The electric control fishing and plugging integrated device of Bohai Drilling integrates the functions of electric control plugging and electric control fishing, enabling simultaneous precise plugging of the downhole pipe string and efficient setting. 04 Application Scenario: Multi-domain Solution The intelligent pressure-sealing technology, with its outstanding performance, has demonstrated extensive application value in various industries and provided customized solutions for different working conditions. Hydrocarbon reservoir pressure repair well operations are an important application area of intelligent plugging technology. The electro-controlled plugging device has been successfully applied in pressure-resisting well repair operations, marking a breakthrough in this type of operation technology. The maintenance of urban gas pipelines has specific requirements for sealing technology. In response to the current situation of pressure connection, cutting and manual operations in the narrow spaces of urban gas pipelines, a series of lightweight and compact pressure-resistant opening sealing devices for pipelines have achieved mechanized operations. Submarine pipeline operations represent the most demanding application scenario. The intelligent pressure-sealing technology within the pipeline has overcome the limitations of traditional methods, significantly expanding its application scope both on land and at sea. Pressurized operations in the oilfield production sector also require specialized sealing devices. The double-stage self-sealing wellhead device employs a double-stage self-sealing mechanism, significantly improving the force-bearing condition of the rubber core during the lifting and lowering of the pipe string, and enhancing the reliability of self-sealing and the lifespan of the sealing components. 05 Key Advantages: The Revolutionary Value of Intelligent Control Compared with traditional sealing technologies, the pressure-sealing technology with self-control system demonstrates overwhelming advantages in multiple aspects and redefines the standards for pipeline maintenance operations.