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Procedure for Identifying Deformations in Oil and Gas Pipelines Subject to External Forces, Based on Primary ILI Data

[+] Author Affiliations
Adriana Galvis Fuentes

Independent Author, Civil Engineer, Bogotá, Colombia

Paper No. IPG2015-8506, pp. V001T02A003; 11 pages
doi:10.1115/IPG2015-8506
From:
  • ASME 2015 International Pipeline Geotechnical Conference
  • ASME 2015 International Pipeline Geotechnical Conference
  • Bogota, Colombia, July 15–17, 2015
  • Conference Sponsors: Pipeline Systems Division
  • ISBN: 978-0-7918-5691-8
  • Copyright © 2015 by ASME

abstract

Oil and gas pipelines that pass through mountainous terrain are subject to an increase in the number of sections affected by the bending deformation’s resulting from external forces, which, when coupled with the construction and operational processes of the systems, cause mechanical damage to the pipelines that has led to containment losses, resulting in operational cost overruns and harmful effects on the environment and on nearby communities, while leaving at high risk the integrity of the petroleum infrastructure.

By using primary data obtained through so-called “smart” in-line inspections or intelligent line inspections (ILIs), the occurrence and magnitude of these deformations and displacements of the pipelines can be determined. With the aid of geotechnical analytical techniques, this information can facilitate the interpretation of the processes that induce these thrusts.

The starting point is the existing knowledge of the characteristics of the installation of the pipelines and of the clearances permitted by the rules and/or reference standards of the industry. The next step consists of comparing that data against the XYZ Data inertial mapping data (obtained through rotations of the XGP geometric tool) in one or more ILI runs, as part of the mechanical analysis procedure.

As a recommended practice, an algorithm is developed for handling the ILI data, showing in parallel the geotechnical zoning data, illustrating it with a study algorithm.

Copyright © 2015 by ASME

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