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| Analysis of sealing reliability for premium connection casing and tubing based on Kriging model |
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LIU Wenhong1, LIN Kai1, FENG Yaorong1, WANG Peng1, XIE Junfeng2, YANG Xiangtong2
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(1.State Key Laboratory of Performance and Structure Safety for Petroleum Tubular Goods and Equipment Materials in CNPC Tubular Goods Research Institute,Xi 'an 710077, China;2.Tarim Oil Field Branch of PetroChina, Korla 841000, China)
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| Abstract: |
| Taking a type of casing premium connection as the analysis object, a function was constructed to evaluate the sealing reliability of the connection, and the load envelope was simulated by using the finite element method. The worst sealing point of the connection was determined during the sealing failure test. Based on the most dangerous load point during the load envelope test, by randomizing effect of the premium connection sealing performance of 11 parameters, the sealing reliability of the casing premium connection was assessed during the test of load envelope using the Kriging surrogate model. The sealing reliability of the connection at the worst load point was obtained. The results show that the Kriging model is an effective method in the evaluation of premium connection sealing reliability based on performance, and it can satisfy the need of engineering application, which is used for the design, optimization and selection of casing and tubing premium connections. |
| Key words: premium connection sealing reliability finite element analysis Kriging model |
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