CONSIDERATIONS ON THE MODELING OF CONNECTIONS FOR REPAIR OF PIPELINES / CONSIDERAÇÕES SOBRE A MODELAGEM DE CONEXÕES PARA REPARO DE DUTOS

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The reduction of pipeline wall thickness caused by corrosion is one of the defects that more affect pipeline structural integrity. These defects can take place in the metal base, in the longitudinal and circumferential welding. With the expansion of the rigid submarine pipelines mesh already installed and considering the advanced time of using, the oil industry has been developing several tools for pipeline repair without compromising the safety and avoiding production stops. The preliminary objective of this work was the study and the generation of computer models, which once parameter, they could be a tool for analyze the repair connection of submarine pipeline. During this study, about two types of repair connection, it was realized that the behaviour at failure described by the connection numerical models has details which needed to be explained in addition to the considered experimental program (Alves). One phase of this research was the laboratory works in which it was possible to repeat the mixture of epoxi resin and cement, according to the references adopted in the experimental program (Alves). Compression test were conducted on cylindrical specimens made of this mixture for determining the stress-strain curve and the Poisson coefficient. Another phase of this research was the consulting of other works which could indicate the expected behaviour of the mixture subjected to the compression load. Finally, analytical and numerical models of repair connection were generated the results were compared with those obtained on experimental program (Alves) Based on comparison, discrepancies were detected as well as they possible causes. Suggestions to obtain the initial objective were indicated.

ASSUNTO(S)

defeitos de corrosao corrosion defects pipes dutos reparo repair

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