SIMULATION STUDY ON AFFECT FACTORS OF WORKOVER STRING BUCKLING IN HORIZONTAL WELL

SIMULATION STUDY ON AFFECT FACTORS OF WORKOVER STRING BUCKLING IN HORIZONTAL WELL

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Understanding the WOB and the law of tubular buckling is significant to handle workover operation efficiently and safely.Based on the simulation theory and the characteristics of opi meet my decorator workover string dynamics,a finite element model is established for the workover string.Then,the tubular in the wellbore is simulated by the model,and the simulation result is highly coincide with the experiment result.The strings in horizontal well is built,and the critical buckling load is analyzed in different friction coefficient and different annular clearance.The results show that: the sinusoidal buckling load and helical buckling load will increase with the friction coefficient,and the helical buckling load increase more rapidly; while with the increase of annular clearance,the buckling yamaha bbne2 load will decrease.

When the annular is larger than 35 mm,the helical buckling load is even smaller than sinusoidal buckling load.