Application of Vibratory Stress Relief on Relaxation of Residual Stress of Expandable Corrugated Liner

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (4) : 171-174.

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Application of Vibratory Stress Relief on Relaxation of Residual Stress of Expandable Corrugated Liner

LIU Xiao-dan1, TAO Xing-hua1, HAN Zhen-qiang2

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Abstract

The over residual stress chould be left in the expandable corrugated liner after deformation under temperature. This will lead to both the serious deformation and the unstable dimension of the liner ends. That has already become the key factor to prevent us from getting higher quality and more welding efficiency. This paper aims to work out a feasible method to remove residual stress as much as possible. Hence we develop a set of new engineering technology, parameter, appricial methods, and the post analysis method based on plenty of datum from laboratory and well cite. Here the new method is used to verify the effectiveness of the parameter curves and residual stress measured by blind-hole method. The result tells that it can be applied to decrease residual stress greatly in liners. So the Vibratory Stress Relief is believed to be a fair well way to improve the welding efficiency and obtain better stability of the liner section.

Key words

expandable corrugated liner / residual stress / vibratory stress relief / dimensional stability

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LIU Xiao-dan;TAO Xing-hua;HAN Zhen-qiang. Application of Vibratory Stress Relief on Relaxation of Residual Stress of Expandable Corrugated Liner[J]. Journal of Vibration and Shock, 2015, 34(4): 171-174