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Petroleum Science >2014, Issue 3: 417-423 DOI: https://doi.org/10.1007/s12182-014-0356-z

Theoretical and experimental study of the thermal strength of anticorrosive lined steel pipes Open Access

文章信息

作者：Zeng Dezhi,Deng Kuanhai,Lin Yuanhua,Shi Taihe,Shi Daiyan and Zhou Lizhi

作者单位：

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University), Chengdu, Sichuan 610500, China CNPC Key Laboratory for Tubular Goods Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;CNPC Key Laboratory for Tubular Goods Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University), Chengdu, Sichuan 610500, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University), Chengdu, Sichuan 610500, China;Southwest Branch of Engineering Design Co. Ltd., CNPC, Chengdu, Sichuan 610500, China;Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China

投稿时间：2013-09-17

引用方式：Zeng, D., Deng, K., Lin, Y. et al. Pet. Sci. (2014) 11: 417. https://doi.org/10.1007/s12182-014-0356-z

文章摘要

Bimetallic lined steel pipe (LSP) is a new anti-corrosion technology. It is widely used to transport oil, gas, water and corrosive liquid chemicals. At present, the hydroforming pressure for LSP has been investigated theoretically and experimentally by most researchers. However, there are a few reports on the thermal strength of bimetallic LSP. Actually, the bimetallic LSP will be subjected to remarkable thermal load in the process of three layer polyethylene (3PE) external coating. Reverse yielding failure may occur on the inner pipe of the bimetallic LSP when it suffers from remarkable thermal load and residual contact pressure simultaneously. The aim of this paper is to study the thermal load and strength of the bimetallic LSP. A mechanical model, which can estimate the thermal strength of the bimetallic LSP, was established based on the elastic theory and the manufacture of the bimetallic LSP. Based on the model, the correlation between the thermal strength of the bimetallic LSP and residual contact pressure and wall thickness of the inner pipe was obtained. Reverse yielding experiments were performed on the LSP (NT80SS-316L) under different thermal loads. Experiment results are consistent with calculated results from the theoretical model. The experimental and simulation results may provide powerful guidance for the bimetallic LSP production and use.

关键词

Thermal strength, reverse yielding, mechanical model, lined steel pipe, residual contact pressure