Calculation of the stress-strain state of an element of an underground oil pipeline, taking into account the appearance of an overpressure wave

At present, a large number of extended pipeline systems are operated in our country, which are designed for pumping energy resources. Improving the reliability of these pipelines is one of the most important tasks during the operation period. Operational regimes of oil pumping, both through main and field pipelines, provide for a change in pumping capacity, emergency shutdowns of pumping equipment, unauthorized blocking of the flow as a result of closing valves. Such events lead to the occurrence of hydraulic shock in the pipeline and its influence on the strength characteristics of pipes, which can have different material designs. In this regard, the consideration of issues related to the influence of hydraulic shock on the strength characteristics of the pipeline is very relevant in our time. This article is devoted to the study of the stress-strain state of an element of an underground oil pipeline, taking into account the occurrence of an overpressure wave. The paper presents calculation methods that make it possible to evaluate the effect of an overpressure wave on the structural elements of a pipeline in an underground environment. The factors influencing the dynamics of deformations and stresses in pipeline materials under various operating conditions are considered. The analysis of the results of numerical calculations is presented, demonstrating the influence of the parameters of the overpressure wave on the reliability and safety of underground oil pipelines. The findings can be used to optimize the design and operation of pipeline systems under variable loads, thus helping to increase the resilience of the infrastructure and reduce the risk of accidents.