Assessment and safety of operation of oil and gas pipelines in non-steady conditions of technological parameters
The relevance. Changes in technological parameters of product pumping at oil and gas pipelines operation in comparison with the stationary operating condition leads to appearance of additional mechanical stresses in the wall of pipes and to decrease in margin of safety. At the same time, the pipelin...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2018-02-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya-tpu.ru/archive/article/view/1977 |
| Summary: | The relevance. Changes in technological parameters of product pumping at oil and gas pipelines operation in comparison with the stationary operating condition leads to appearance of additional mechanical stresses in the wall of pipes and to decrease in margin of safety. At the same time, the pipeline resource specified in the project changes to decrease. The risk of failures increases. This substantiates the development of methods for assessing and ensuring the safety of oil and gas pipelines in conditions of non-stationarity of technological parameters of operation. The main aim of the research is to assess and ensure the safety of operation of oil and gas pipelines at non-stationarity of pumping technological parameters. Object: pipeline system of oil and gas industry. Methods: theoretical studies of oil and gas pipeline operation safety in conditions of non-stationarity of technological parameters of the pumping regime. Results. The authors have obtained the analytical dependences of pipelines strength on parameters of non-stationarity of pumping regime and recommended to ensure safety of oil and gas pipelines in conditions of non-stationarity of technological operating parameters. Conclusions. In non-stationarity conditions of oil and gas pipelines technological parameters while operation, in the wall of their pipes, the increased mechanical stresses occur that reduce the safety and life of the structure. Under the same conditions of inner pressure, the highest stresses arise in section of pipeline connection with equipment which have absolute rigidity for deformation. Mechanical stresses reduction in pipeline wall is provided by pumping regime smooth regulation, which is realized on oil pipelines by means of the main pumps, equipped with frequency-regulated electric drive. The pipelines exploitation safety in non-stationarity conditions of pumping technological parameters can be reached by pumping regime regulation with use of frequency-regulated electric drive. |
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| ISSN: | 2500-1019 2413-1830 |