New Analysis Theory and Method for Drag and Torque Based on Full-Hole System Dynamics in Highly Deviated Well

<div>Contact force: (a) transient processes of contact force in the node located at 600 m for 4305 m drill string and (b) transient processes of contact force in the node located at 3000 m for 4305 m drill string.</div>

Mathematical Problems in Engineering

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Figure 9

Figure 9: New Analysis Theory and Method for Drag and Torque Based on Full-Hole System Dynamics in Highly Deviated Well 