Study on the Uniform Corrosion Characteristics and Influencing Factors of P110S Tubing

In the field of oil and gas exploitation, as a key equipment, P110S tubing faces severe corrosion challenges, among which uniform corrosion is a common and significantly impactful form of corrosion. This paper takes P110S tubing as the research object, and comprehensively applies experimental research, numerical simulation, theoretical analysis and other methods to deeply explore its uniform corrosion characteristics and influencing factors. An electrochemical corrosion experiment is carried out through a self-made stress loading device to obtain the corrosion rates under different stress states. A three-dimensional finite element model is established using ABAQUS software to simulate and analyze the influence of factors such as the size of uniform corrosion defects, temperature, duration, and operating pressure on the mechanical behavior of the tubing. And the influence degree of each factor is determined through grey relational analysis. The research results show that stress significantly accelerates the corrosion of P110S tubing, and the corrosion rate increases with the increase of stress. Among the uniform corrosion defects, the corrosion depth is the most critical factor affecting the corrosion of the tubing, while the circumferential length and axial length have relatively little influence. In addition, an increase in temperature, an extension of duration, and an increase in operating pressure will all intensify the corrosion of the tubing. The research results of this paper provide a solid theoretical basis for accurately predicting the remaining life of P110S tubing and rationally formulating maintenance and replacement strategies, and have important practical significance for ensuring the safe production of oil and gas fields.