Invention Grant
US07984773B2 Sonic drill bit for core sampling 有权
声波钻头用于核心采样

Sonic drill bit for core sampling
Abstract:
A drill bit for core sampling includes a body having a central axis and first end having a tapered outer surface and a radius transverse to the central axis, and an insert having a cutting surface on the first end oriented at an axial angle relative to the radius to move material displaced during drilling away from the first end.
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