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- W2370196028 abstract "The combine force of the drill string is very complex during DWA.Pneumatic power hammer drive the drill string axial vibration which is the most serious factor,because it often cause the fatigue failure to the drill string.The axial stress and size of the failure crackle formula was amended in this paper,and then the average stress of the risk spots is calculated by using No.4 strength theory and gave a new fatigue life model of the drill string: Walker model.This paper explained the drill string failure reason in Tarim Oilfield by the results calculated." @default.
- W2370196028 created "2016-06-24" @default.
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- W2370196028 date "2010-01-01" @default.
- W2370196028 modified "2023-09-25" @default.
- W2370196028 title "Research on Predicting DWA Drive Drillstring Fatigue Life by Walker Model" @default.
- W2370196028 hasPublicationYear "2010" @default.
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