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Fatigue Life Prediction of Buckling String with Cracks in Horizontal Wells of Mining Engineering

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Abstract:

Fatigue damage in the rotating drill pipe in the horizontal well of mining engineering is usually resulted from cyclic bending stresses caused by the rotation of the pipe especially when it is passing through curved sections or horizontal sections. This paper studies fatigue life prediction method of rotating drill pipe which is considering initial crack in horizontal well of mining engineering. Forman fatigue life prediction model which considering stress ratio is used to predict drill string fatigue life and the corresponding software has been written. The program can be used to calculate the stress of down hole assembly, can predict stress and alternating load in the process of rotating-on bottom. Therefore, establishing buckling string fatigue life prediction model with cracks can be a good reference to both operation and monitor of the drill pipe for mining engineering.

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Info:

Periodical:

Advanced Materials Research (Volume 577)

Pages:

127-131

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.577.127

Citation:

Cite this paper

Online since:

October 2012

Authors:

Peng Wang, Tie Yan, Xue Liang Bi, Shi Hui Sun

Keywords:

Buckling, Drill String, Fatigue Life, Horizontal Well, Prediction

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