Mechanical Analysis of the Down-Hole String in a Deep Well |
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Authors: | HE Yu-fa LIU Qing-you ZHU Xiao-lan |
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Affiliation: | [1]Deepwater Engineering Key Laboratory, CNOOC Research Institute, Beijing 100027, China [2]College of Mechanical and Electric Engineering, Southwest Petroleum University, Chengdu 610500, China [3]Operations Engineering and Optimization, ConocoPhillips China Inc. , Tianjin 300457, China |
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Abstract: | In a deep well, under high pressure and temperature, the force, deformation, and movement of the downhole string are very complicated. In this paper, based on the analysis of the working environment and load properties of the down-hole string in deep wells, the factors of high temperature, high pressure, and the complex structure of wells have been taken into consideration. The loads of the down-hole string, stability, back buckle configuration, dynamic characteristics, mechanical strength, and deformation have been systematically studied. On this basis, mechanical models of a down-hole string under different conditions have been established and software for aiding analysis has been developed. By using this software, deep well strings under different construction parameters can be simulated and analyzed, providing a theoretical basis and method for down-hole string assembly, as well as string down-hole construction and operation. |
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Keywords: | Down-hole string Mechanical behavior Optimization design Software development |
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