Patent ID: 8336647

Claim:
A sonic drill bit for obtaining a core sample, comprising: a body having a central axis, an inner surface, and an outer surface, said body further including a first end and a second end, wherein said first end includes a taper toward the central axis that extends at least the majority of the distance from said outer surface to said inner surface; at least one insert extending upwardly from the first end of the body, each insert having a top portion having a substantially truncated pyramidical cross-sectional shape that defines a substantially planar cutting surface that extends radially outward from said inner surface at a plurality of different angles relative to the central axis of the body; one or more helical channels extending along said outer surface, said one or more helical channels extending from said first end toward said second end of said body; and one or more fluid ports extending between the inner surface and the outer surface, each positioned a distance from said first end.