Method for determining technological parameters to repair pipeline with out-of-spec curvature

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Published May 31, 2020
Victor M. Varshitsky Igor B. Lebedenko Eldar N. Figarov

Abstract

When performing in-line inspection of trunk pipelines, line pipe sections are detected with curvature exceeding the values required by specifications. To prepare a repair work project that entails bringing the pipeline into the standard conditions, it is necessary to determine the technological parameters of the repair. The corresponding technique is known for cases of moving an initially straight pipeline. The authors of the paper have developed the method for determining the technological parameters to repair pipeline with out-of-spec curvature of the axis. The method is based on simulation of pipeline deformation with the initial curvature of the axis, taking into account the actual operating conditions of the pipeline and in-line inspection data. Examples of calculations of repair technological parameters and stress-strain state of pipeline sections with out-of-spec curvature are given. The simulation results confirm the possibility for applying this method to assess the technological parameters of repair, the length of trench excavation, the size and limits of the pipeline additional burying or lifting, and to determine the stress-strain state of the pipeline section under repair during and after repair work.

How to Cite

1.
Varshitsky VM, Lebedenko IB, Figarov EN. Method for determining technological parameters to repair pipeline with out-of-spec curvature. PST [Internet]. 2020May31 [cited 2020Aug.8];4(2(4):84-8. Available from: http://pipeline-science.com/index.php/PST/article/view/121

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Keywords

Pipeline, out-of-spec curvature radius, technological parameters of repair, calculation of stress-strain state.

References
[1] Varshitsky V. M., Figarov E. N., Lebedenko I. B. Stress analysis of the pipeline condition with outof- spec curvature of the axis. Nauka i tehnologii truboprovodnogo transporta nefti i nefteproduktov–Science & Technologies: Oil and Oil Products Pipeline Transportation. 2018;8(3), pp 273–277. (In Russ.)
[2] Bykov L. I., Mustafin F. М., Rafikov S. К., Nechval А. М., Lavrentyev А. Е. Typical calculations for construction and repair of oil and gas pipelines:
Textbook. Saint Petersburg: Nedra Publ.; 2006. p 824. (In Russ.)
[3] Feodosyev V. I. Ten lectures-talks on the strength of materials. Moscow: Nauka Publ.; 1975. p 173. (In Russ.)
Section
Original Work