Experimental Study on Fatigue Damage of the Drilling Pipe Thread Based on Metal Magnetic Memory Testing
ZHANG Guo-ying
FAN Jian-chun
SHAO Pan
Abstract：The thread of drilling pipes can easily generate fatigue failure and cause heavy losses because of bad working condition and complicated stresses in drilling process.Field examinations of the fatigue failure of the drill pipe thread in different operating conditions were carried out based on the theory of MMMT (Metal Magnetic Memory Testing).The field examinations verified that MMMT is useful in examination of the fatigue failure of the drill pipe,and it is the first three threads from the sealing face that can easily generate fatigue failure,and the longer time the drill pipes are used,the more serious fatigue damage condition of the drill pipe thread will happen.And the recommended standard of the drill pipe thread classification is established based on the analysis of a large number of inspection data.
Keywords：drill pipe threadmetal magnetic memoryfatigue damagedetection
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 24-29 )