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Local lateral stability analysis of deep drilling processes
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DOI：10.1016/j.jsv.2026.120022.png)
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Abstract
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• A linear delay differential equation is formulated to assess the lateral stability of the drill bit. • Key stability factors are identified, including wearflat length and blade geometry. • A geometry-dependent parameter indicates initial forward/backward bit whirl tendency.
Keywords:
Drilling dynamics
Drilling stability
Bit whirl
Delay differential equations
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