Passing capacity of all-polyurethane pig in pipeline with diameter of 323.9 mm

• Published in: You-qi chuyun Vol. 40; no. 1; pp. 90 - 95
• Main Author: Zhenbei LI
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Oil & Gas Storage and Transportation 01.01.2021
• Subjects: diameter of 323.9 mm; oil and gas pipeline; passing capacity; pig; polyurethane
• ISSN: 1000-8241
• DOI: 10.6047/j.issn.1000-8241.2021.01.015

In order to evaluate the effect of the complicated working conditions in small diameter pipeline on the passing capacity of all-polyurethane pig, the possible causes for the whole fracture of all-polyurethane pig were analyzed. 3 D explicit dynamics simulation analysis models for all-polyurethane pig with diameter of 323.9 mm passing through a straight pipeline with single-sided deformation and scaled pipeline were established respectively with the Scan To 3 D technology and the mechanical property test of polyurethane material based on the actually-deformed pipeline with diameter of 323.9 mm on site. Through simulation model solution and result analysis, it is found that the all-polyurethane pig has high passing capacity and good pigging effect under the conditions of single-sided dent deformation and internal wall scaling of straight pipeline. The bending stress and contact stress generated when the all-polyurethane pig passing through a single-sided dent deformation of pipeline are not sufficient to cause