Abstract
Background Steel oil and gas pipeline is prone to accelerated internal corrosion due to its highly aggressive pumped products. This requires the adoption of effective protective measures and the repair works. One of the progressive directions is attributed to sanitation of exhausted pipelines by trenchless technologies. The introduction of a steel pipe or a polymeric composite sleeve, shell or tube (liner) is among these directions also, creating an insulating and reinforcing effects. However, for the application of these technologies in the oil and gas industry it is required to prove their safety and to select the permissible parameters. In this paper the mathematical model of the process of pulling a polymeric liner in steel pipe is developed. Application of this model allows to forecast pulling forces and stresses at the design stage, to select the maximum allowable length of sections depending on their configuration, thereby reducing the excavation amount. Aims and Objectives To develop an effective mathematical model for polymer liner pulling into a steel pipe with a view of its curvature. To explore the basic laws of distribution of forces and stresses in the pulled liner. To propose an algorithm for determination of the safe parameters. Methods The method of mathematical modeling based on the provisions of theoretical mechanics and the theory of elasticity. Results Effective mathematical model of polymer liner pulling into a steel pipe with a view of its curvature is developed. The main mechanisms of distribution of forces and stresses in the pulled liner are investigated. The algorithm of choice of safe working technological parameters of sanitation with polymeric liner pull is developed.
Published Version
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