| Efficiency Study of Pushing Machines in the Oil Industry: Enhancing the Efficiency of the Entire Pipeline Processing and Energy Transmission Chain In the modern petroleum industrial system, pipelines are regarded as the "main artery" for energy transportation, and their safety and reliability directly affect national energy security and the operation of the national economy. During the various stages of pipeline manufacturing and laying, the pushing machine, as a key process equipment, is playing an increasingly important role in the petroleum industry due to its remarkable high efficiency. The application of pushing technology throughout the entire life cycle of petroleum pipelines not only significantly improves production efficiency but also demonstrates indispensable advantages in energy conservation, emission reduction, and quality assurance. I. Core Principles and Technical Advantages of Pushing Technology Pushing is a plastic forming process for metal pipe fittings. Its basic principle is to place the pipe blank on the pushing machine and, through the axial advancement and radial expansion of the core mold, cause the pipe blank to gradually deform into the required curvature and shape under heating. Compared with traditional production methods, pushing technology exhibits multiple significant advantages. Firstly, the pushing process enables continuous operation, significantly improving production efficiency. In actual production, the production process of a bending push machine includes pipe blank cutting and sizing, multi-piece installation, continuous pushing production with medium-frequency heating, shaping of semi-finished products by oil press machines, and cutting of the bending bevel. Due to the use of medium-frequency heating continuous pushing production method, the equipment can achieve continuous processing of multiple pipe blanks, completing the overall shaping of the pipe fittings in one go. Taking the bending production as an example, the hydraulic pushing bending machine can produce a large number of finished pipe fittings annually. Its simple process and smooth operation make the production efficiency significantly higher than traditional stamping or welding processes. Secondly, the pushing process adopts a whole-forming technology, with no weld structure in the product, completely eliminating the performance weakening problem caused by the welding heat affected zone. For petroleum pipelines, welds are often the weakest part of the pipe fittings, and in the long-term operation under high pressure and corrosive media, weld defects are prone to cause leakage or even pipe burst accidents. The whole-forming characteristic of the pushing process enables the pipe fittings to have better pressure-bearing capacity and fatigue resistance, fundamentally solving the quality problems of welded pipe fittings. Furthermore, the wall thickness uniformity of the pushed bends is better, with the difference in inner and outer arc wall thicknesses controlled within a very small range. This performance advantage is attributed to the reasonable redistribution of metal materials during the pushing process, where the pipe wall maintains a uniform thickness distribution during the bending process. For petroleum pipelines under high-pressure transportation tasks, the uniformity of wall thickness directly relates to the pressure-bearing capacity and service life of the pipeline. The advantage of the pushing process in this key indicator makes it the preferred technical solution for petroleum pipe fittings production. II. The Driving Effect of Medium-Frequency Heating Technology on Efficiency Medium-frequency heating is one of the core technologies of the pushing machine and is a key support for achieving efficient production. Pushing bending machines use seamless steel pipes, welded steel pipes, or spiral pipes as raw materials and adopt medium-frequency heating methods. The power and frequency can be adjusted to ensure the appropriate penetration depth, ensuring stable material performance of the products. The power factor of the medium-frequency power supply can reach over 0.95, meaning that the equipment has an extremely high energy utilization rate during operation and extremely limited energy waste. Compared with traditional heating methods, medium-frequency heating has the advantages of fast heating speed, precise temperature control, and small heat affected zone, and can heat the pipe blank to the required temperature in a very short time, significantly reducing the processing cycle of a single piece. At the same time, the heating temperature is generally controlled at around 800°C, belonging to the warm extrusion processing category, which can ensure the plastic deformation ability of the metal material while avoiding the problem of grain coarsening caused by overheating. From the perspective of efficiency, the high efficiency of the medium-frequency heating pushing machine is reflected in the following aspects: First, the heating speed is fast, resulting in higher processing output per unit time; Second, the energy utilization rate is high. The power factor of the medium-frequency power supply is above 0.95, reducing ineffective energy consumption. Third, the automation level is high. Hydraulic cylinders are used to push the raw materials, featuring powerful thrust, stepless speed regulation, and automatic control, which can significantly save manpower and material resources. In addition, this process also has the advantages of low construction investment, high material yield, and strong applicability of raw material specifications. From a comprehensive cost perspective, it achieves the maximization of production efficiency. Taking typical technical parameters as an example, the advanced pusher machine can achieve the optimal matching of pushing speed and heating power during the processing process, controlling the forming angle deviation within a very small range, which is of great significance for the quality stability and production efficiency of large-scale production of petroleum pipe fittings. III. Efficiency Enhancement and Automation Transformation of Intelligent Pusher Machines With the integration and application of artificial intelligence, industrial Internet of Things, and advanced manufacturing technologies, new pusher machines are rapidly evolving from traditional mechanical equipment towards intelligent, efficient, and green directions. This technological transformation has a more profound impact on the efficiency improvement in the petroleum field. In terms of equipment structure, traditional pusher machines use mechanical transmission methods, which have problems such as low space utilization efficiency and poor adaptability. The new pusher machines have made revolutionary improvements in the transmission structure, adopting the meshing design of rack and transportation gears, achieving a more compact structure design, not only reducing the equipment occupation space but also improving the stability and reliability of the pushing process. The mold structure has also been optimized, through one-time forming and stamping technology, the new pusher molds can complete multiple processes simultaneously, significantly improving work efficiency and reducing energy consumption and costs. In the control system aspect, the most remarkable progress of the pusher machine technology lies in the application of intelligent control systems. The intelligent perception and decision-making system enables the pusher machine to monitor the processing status in real time and automatically adjust working parameters. Through sensors to collect data and detect abnormalities, the pusher machine can promptly detect and correct deviations during production, significantly reducing production interruption time. This feature is particularly important for the large-scale continuous production of petroleum pipe fittings, as the reduction of production interruptions directly translates to increased output and cost reduction. Intelligent upgrading also shows strong efficiency gains in pipeline construction. For example, the automatic pusher device developed by the Dangang Oilfield Downhole Operation Company has achieved mechanization of moving and lifting oil pipes and sucker rods, and has been verified in a large number of on-site applications to demonstrate the efficiency of the device. Through the application of the automatic pusher device, labor intensity has been significantly reduced, the on-site working environment has been improved, and the automation level of well repair operations has been significantly enhanced, providing a solid equipment support guarantee for the acceleration and efficiency improvement of well repair construction. The promotion of this automation technology reflects the efficiency improvement value of pusher machine-related equipment in the entire petroleum value chain. IV. Application Efficiency of Pusher Machines in Petroleum Pipeline Construction and Maintenance The application of pusher technology is not limited to factory production of pipe fittings, but also plays an important role in on-site construction and maintenance operations of petroleum pipelines. In non-excavation construction fields such as horizontal directional crossing, the pusher machine serves as a key auxiliary equipment, providing innovative solutions to technical problems in the large-diameter and long-distance pipeline laying. In large-diameter and long-distance pipeline laying projects, traditional methods mainly rely on optimizing the power system of the drilling rig or replacing larger-sized drilling rigs, but these methods all increase the tensile stress of the drill and pipeline in a single direction, causing drill rig fractures and high construction risks. The new pusher machine provides effective auxiliary pushing force in such working conditions. For instance, the PT-500 pipe pushing machine has been successfully applied in natural gas pipeline networks and gas transmission projects. It assists horizontal directional drilling machines in pulling back pipelines in complex strata (such as sand-rock transition layers, pure sand layers), solving the problems of insufficient pulling-back force and prone-to-collapse in traditional methods. Practice has shown that this equipment has reliable performance, convenient operation, and strong adaptability, significantly improving pipeline laying efficiency and reducing construction risks. In terms of application efficiency, the pipe pushing machine demonstrates various advantages: assisting horizontal directional drilling machines in synchronous pipeline pulling back, which can reduce construction costs, reduce pipeline load, lower project cost, reduce accident risks, and improve construction efficiency; at the same time, it avoids the damage to pipe materials caused by the huge impact force of traditional hammering methods, making it one of the safe and economical means in current large-scale directional drilling construction. Moreover, the pipe pushing machine also plays a key role in pipeline installation in long-distance tunnels, where the pipes are prefabricated on both sides of the tunnel entrance and then directly pushed into the tunnel, achieving efficient installation and positioning of the pipes. V. Energy-saving Effects and Environmental Contributions of Pipeline Fitting Pushing Technology Driven by the "carbon neutrality" goal, the green and low-carbon transformation of the petroleum industry has become an irreversible development trend. The pipeline fitting pushing technology has unique contribution value in this transformation process. The medium-frequency pushing technology, with its efficient and energy-saving technical characteristics, is promoting the petroleum pipe material manufacturing industry towards a resource-saving and environmentally friendly direction. From the perspective of energy consumption, the high efficiency and low energy consumption of the pushing technology are complementary. Due to the significantly higher energy conversion efficiency of medium-frequency heating compared to traditional resistance heating or gas heating methods, the proportion of effective energy used for heating the pipe billet during the pushing process has greatly increased, and heat loss has been significantly reduced. At the same time, the high yield rate and low material cutting loss of the pushing technology mean that the same amount of raw materials can produce more qualified products, reducing resource waste at the source. For the batch production of petroleum pipe fittings, this "less waste and more production" production mode has positive significance for resource conservation and environmental protection. It is worth noting that the green transformation in the petroleum pipe material manufacturing field is continuously advancing from the material level. The international standard for thermoplastic inner liner oil pipes, led by the China Petroleum Engineering Materials Research Institute, has been officially released. This product uses the inner insertion and reduction process, inserting thermoplastic pipe materials into the inner wall of the metal oil pipe, with energy consumption and carbon emissions of this product being reduced by more than 90% compared to traditional reprocessing of metal pipes. Under the trend of new materials and new technologies, the combination of pushing technology and composite pipe material processing will bring a broader development space for petroleum pipe material manufacturing. In the pipeline operation环节， the innovation of green and low-carbon technologies is also remarkable. In the application of the Tarim Oilfield， the green intelligent electric heating equipment replaces traditional gas heating furnaces with electric heating， achieving zero carbon and zero nitrogen emissions， with an annual carbon reduction of several hundred tons， and a thermal efficiency of up to 98%， with extremely high temperature control accuracy. In the operation of long-distance crude oil pipelines， through technological innovation， a significant achievement of reducing energy consumption by 65% has been achieved. These data fully demonstrate that the green upgrade of the entire petroleum pipeline system has become a reality， and the pushing technology， as a key support in the pipeline manufacturing and construction process， plays an indispensable role. VI. Current Development Status and Future Prospects of the Pushing Machine Industry As an important process equipment for pipeline manufacturing， the industrial foundation and development trend of the pushing machine directly affect the supply capacity and technical level of the upstream industrial chain of the petroleum industry. Taking the important agglomeration area of pipeline manufacturing in China as an example， the Yanshan County of Cangzhou City， Hebei Province， is known as the "China Pipeline Manufacturing Base"， with a large number of pipeline pipe fitting manufacturers gathered， possessing advanced fully automatic medium-frequency induction pushing machines and other excellent production equipment， and the products are widely used in petroleum， chemical， gas， nuclear power and other industries. Companies like Cangzhou Aoguang Machinery Equipment Co., Ltd., which have been deeply engaged in the field of pipe forming equipment for a long time, have accumulated rich practical experience through continuous technological research and process optimization. They have made significant contributions to promoting the advancement of push-forming technology and improving the efficiency of oil pipe manufacturing. The push-forming machine industry is a capital and technology-intensive industry. Large-scale medium-frequency push-forming machines and complete sets of testing equipment require huge investments, and they have extremely high requirements for materials metallurgy, heat treatment processes, and non-destructive testing technologies. Under the policy guidance of the mechanical industry's overall move towards high-quality development, the development of the push-forming machine industry still has broad prospects. From the perspective of technological trends, the future push-forming machines will continue to evolve in the following directions: First, a higher degree of intelligence, achieving autonomous perception, autonomous decision-making, and autonomous optimization in the processing process through deep integration of AI technology; second, a wider range of greenness, further reducing energy consumption and carbon emissions through energy efficiency improvement and process optimization; third, stronger adaptability, capable of responding to more complex material types and specifications requirements and meeting the increasingly diverse pipe needs of the oil industry. In the context of the increasing demands for pipeline safety and performance in the oil industry, the pusher machine, as the core equipment for ensuring the quality of pipe fittings and enhancing production efficiency, will increasingly demonstrate its strategic value. From the factory precision forming of pipe fittings to the intelligent laying of long-distance pipelines, from the improvement of production efficiency in the workshop to the safety guarantee at the construction site, the pusher machine is continuously injecting new impetus into the efficient, safe and green development of oil energy transportation through all-round technological innovation and performance enhancement. With the continuous breakthroughs in intelligent, green technology and new material processes, the efficiency performance of the pusher machine in the oil field will constantly reshape people's perception, providing more solid technical support for the high-quality development of modern oil industry. |
