Against the background of the in-depth advancement of the “double carbon” strategy, the oil drilling industry, as a high-energy-consuming and high-emission field, is accelerating its transformation towards green and low-carbon. As the core power transmission component of drilling equipment, the operational efficiency, energy consumption level and environmental performance of the oil drilling rigs cardan shaft directly affect the green development level of the entire drilling system. Promoting the energy-saving optimization and environmental protection upgrade of the cardan shaft can not only reduce the energy consumption and pollutant emissions of drilling operations but also reduce the operating costs of enterprises, achieving a win-win situation of economic and environmental benefits, and becoming an important direction for the high-quality development of the cardan shaft industry.
Energy-saving optimization is the core of the green development of the cardan shaft, which focuses on improving power transmission efficiency and reducing operational energy consumption. In the operation process of traditional oil drilling rigs cardan shaft, due to unreasonable structural design, insufficient fit accuracy of components, lubrication failure and other reasons, large power loss will occur, which not only increases the energy consumption of drilling equipment but also reduces operational efficiency. To achieve energy-saving optimization, enterprises have made efforts from multiple dimensions such as structural design, material selection, and lubrication technology to develop lightweight and high-efficiency cardan shaft products. In terms of structural design, an integrated structure design is adopted to reduce the number of components and its own weight, and at the same time, the structure of the cross shaft and spline pair is optimized to reduce friction loss during transmission, improve power transmission efficiency, and reduce the power loss of the cardan shaft by more than 10%.
The upgrading of material selection provides important support for the energy-saving optimization of the cardan shaft. High-strength, lightweight new materials, such as carbon fiber composites and high-strength aluminum alloys, are used to replace traditional heavy alloy steel. On the premise of ensuring the bearing capacity and reliability of the cardan shaft, the weight of the cardan shaft is effectively reduced, and power consumption is reduced. For example, compared with the traditional alloy shaft tube, the cardan shaft with carbon fiber shaft tube can reduce the weight by more than 30%, which not only reduces the energy consumption during power transmission but also reduces the load of drilling equipment, further improving the energy-saving effect of the entire drilling system. At the same time, new materials have better wear resistance and fatigue resistance, which can extend the service life of the cardan shaft, reduce the frequency of component replacement, and indirectly reduce energy consumption and resource waste.
Environmental protection upgrading mainly focuses on reducing pollutant emissions and promoting the recycling of waste products. In the production process of the cardan shaft, the manufacturing process is optimized to reduce the emission of waste water, waste gas and waste residue. For example, environmentally friendly heat treatment technology is adopted to replace the traditional high-pollution heat treatment technology to reduce waste gas emissions; water-based anti-corrosion coatings are used to replace solvent-based coatings to reduce the emission of volatile organic compounds (VOCs) and reduce environmental pollution. In terms of lubrication technology, environmentally friendly lubricating grease is selected, which not only has excellent lubricating performance but also is degradable, reducing the pollution of soil and water bodies caused by lubricating grease leakage; at the same time, a lubricating grease recycling mechanism is established to recycle waste lubricating grease and realize resource recycling.
The remanufacturing of waste cardan shafts is an important path to achieve green and low-carbon development. The service life of oil drilling rigs cardan shaft is usually 5-8 years. Waste cardan shafts contain a large number of recyclable components such as steel and bearings. Through processes such as disassembly, testing, repair and reprocessing, waste cardan shafts can be converted into qualified products and put into use again. The performance of the remanufactured cardan shaft can reach more than 90% of that of new products, while the manufacturing cost is only about 50% of that of new products, which not only saves raw material resources, reduces the pollution of waste products to the environment but also reduces the equipment procurement cost of enterprises. At present, some domestic enterprises have established a complete recycling and remanufacturing system for waste cardan shafts, forming a closed loop of “recycling – testing – repair – certification – reuse”, promoting the development of the cardan shaft industry towards a circular economy.
In the future, with the in-depth popularization of the green and low-carbon concept, the energy-saving optimization and environmental protection upgrade of the oil drilling rigs cardan shaft will continue to advance. Enterprises will further increase investment in green technology R&D, promote the R&D and application of lightweight, high-efficiency and environmentally friendly cardan shaft products, optimize production processes, improve the recycling and remanufacturing system, and at the same time strengthen collaborative cooperation with drilling enterprises to promote the transformation of the entire oil drilling industry towards green, low-carbon, efficient and energy-saving direction, providing strong support for the realization of the “double carbon” goal.