Single-waterway drill bits and systems for using same

摘要

Implementations of the present invention include drilling tools having axially-tapered waterways that can increase flushing and bit life, while also decreasing clogging. According to some implementations of the present invention, the drilling tool can have a single notch extending into the cutting face and a plurality of bores extending from the cutting face to an interior space of the drilling tool. Implementations of the present invention also include drilling systems including drilling tools having a single notch and a plurality of bores.

主权项

1. A core-sampling drill bit having a longitudinal axis, comprising:
a shank; an annular crown surrounding the longitudinal axis of the drill bit, the annular crown having a cutting face, an inner surface, and an outer surface, the annular crown and the shank cooperating to define an interior space about the longitudinal axis configured to receive a core sample; wherein the annular crown defines a single notch, wherein the notch extends radially from the inner surface to the outer surface, and wherein the notch extends axially from the cutting face into at least a portion of the annular crown relative to the longitudinal axis, and wherein the annular crown further defines a plurality of bores, wherein each bore of the plurality of bores is enclosed within the annular crown between the inner surface and the outer surface, and wherein at least one bore of the plurality of bores extends from the cutting face to the interior space.