The critical buckling load is the highest axial force that a column can withstand before buckling.
Buckling occurs along the horizontal axis for which the column's moment of inertia is lowest. The critical buckling load of a long column with pinned ends is predicted by the Euler column formula. The Euler formula is P cr = 2 E I L 2 where L is the column's length, I is the moment of inertia, and E is the modulus of elasticity in (force/length2). In order to access a formation, deviated wellbores that veer away from the vertical at an angle are frequently drilled using directional drilling.
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