METHOD OF DETERMINING WHEN TOOL STRING PARAMETERS SHOULD BE ALTERED TO AVOID UNDESIRABLE EFFECTS THAT WOULD LIKELY OCCUR IF THE TOOL STRING WERE EMPLOYED TO DRILL A BOREHOLE AND METHOD OF DESIGNING A TOOL STRING

摘要

A method of determining when tool string parameters should be altered to avoid undesirable effects that would likely occur if the tool string were employed to drill a borehole includes, modeling portions or an entirety of the tool string in the borehole under steady state loading conditions, identifying deflections of the tool string with the modeling when buckling would occur for specific tool string parameters, and calculating whether whirl exhibiting similar deflections of the tool string to those identified during buckling would be undesirable.