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《Well Logging Technology》 2007-02
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Study and Application of Casing Stress Measuring Tool

WANG Zhong-yi1,MA Wen-zhong1,ZHOU Zhi-bin1,LI Zi-ping2,QI Xiang-yang1(1.Well Logging Company,Drilling and Exploration Group of Daqing Petroleum Administration,Daqing,Heilongjiang 163412,China;2.Daqing Oilfield CO.LTD.,Daqing,Heilongjiang 163001,China)  
A non-destructive testing technique of stress of ferromagnetic substance applying reverse magnetostriction effect has maturely developed in non-destructive testing domain.Based on the technique,developed was a magnetic tool for testing stress of oil casing,which could forecast collapse of casing as its plastic distortion had just happened.Case studies of 5 wells with collapsed casing in Daqing Oilfield show that the tool is sensitive to micro-distortion of casing and that the method has its own advantage over others in casing inspection.
【CateGory Index】: TE937
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