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- W2355112421 abstract "Aiming at the instability phenomena of drill string in the process of drilling operation,the nonlinear drill string helical bucking model is set up.Also,the finite element analysis is presented with numerical method.The theory and the rule of drill string bucking influenced by dead load,rotating speed,weight on the bit and the well deviation are explained.It is shown that under the same conditions,the helical buckling load increases nonlinearly with the increase of the well deviation and decreases nonlinearly with the increase of torsion and the reduction decreases with the increase of deviation angle.From the analysis,the displacement and stress are objectively reflected when drill string buckling occurs in the well.The critical buckling load of drill string under various conditions is forecasted.For the study on nonlinear buckling of drill string,the optimization of BHA design and the reduction of drilling cost,there are both the theoretical and project practical significance." @default.
- W2355112421 created "2016-06-24" @default.
- W2355112421 creator A5064258102 @default.
- W2355112421 date "2010-01-01" @default.
- W2355112421 modified "2023-09-23" @default.
- W2355112421 title "NONLINEAR STABILITY ANALYSIS FOR HELICAL BUCKLING OF DRILL STRING IN WELLBORE" @default.
- W2355112421 hasPublicationYear "2010" @default.
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