Petroleum exploration and development equipment refers to comprehensive equipment for oil and natural gas exploration, drilling, development, storage and transportation, including various types of geophysical prospecting and logging equipment, drilling equipment, oil and gas production equipment, downhole operation equipment, oil and gas gathering and transportation Equipment, offshore drilling platform equipment, etc. and related accessories and tools; oil refining and petrochemical equipment refers to the complete set of equipment required in the whole process of oil and natural gas processing and conversion, including general equipment (such as various process compressors, expanders, etc.) , pumps and valves, etc.) and medical equipment (such as reactors, towers, heat exchange equipment, industrial furnaces, storage and transportation equipment, medical machinery, etc.). The equipment specifications and parameters of the oil refining and petrochemical industry are determined by the process of the oil refining and petrochemical industry. The oil refining and petrochemical industry is a process industry. The requirements for automation are high, and it is required to be able to run continuously and stably for a long period of time, so there are high requirements for the reliability of the equipment. The oil and gas exploration, development and production process is characterized by multiple links, complex technologies, and high individual requirements.
An elevator link is an important implement in oil drilling: if an elevator link breaks catastrophic accident may occur. It is necessary to reduce the weight of elevator links and to prolong their service life to facilitate drilling opera- tions and to ensure safety. We have developed low-carbon martensitic steel, 0.2C-Si-Mn-Mo-V, with high strength, ductility and fracture toughness, which has been used satisfactorily for making all kinds of light-weight elevator links in the People's Republic of China. The weight of these elevator links is much less than that of conventional links, but in recent years there have been occasional reports or fracture of these light-weight links after a period of service, apparently due to fatigue.