Method for Pipeline Section Retrieval for Overhaul with Complete Replacement

Abstract

Earthworks required for overhaul or reconstruction of underground trunk pipelines with complete replacement of pipeline sections are one of the most labor-intensive. The paper suggests a new innovative method for retrieving a pipeline section to avoid using a single-bucket excavator along the entire section. The method reduces the duration of overhaul involving complete replacement of a worn-out pipeline section. The technology suggested is intended to improve the method of pipeline overhaul with complete pipeline section replacement. The study is focused on a set of devices used to retrieve a pipeline section. Based on a 3D model simulating the process flow of pipeline section retrieval, the related processes were observed and studied in depth, and the suggested innovative solutions were adapted as part of the repair and construction flow. The new method helps to, firstly, simplify the process of overhaul with complete replacement, secondly, improve the ecological situation in the construction area, and thirdly, upgrade the repair and construction flow outfitting. All pertinent equipment and devices can be used multiply, which is an indisputable advantage. The method is environmentally safe and suitable for all climate conditions, including complex ones. This innovative method allows retrieving underground pipeline sections regardless of their diameter. A broad use of this pipeline section retrieval method is ensured by a regular set of machinery and equipment available to nearly all repair and construction organizations and remotely controllable to reduce workforce needed for the above overhaul operations.