DRILL BITS WITH AXIALLY-TAPERED WATERWAYS

摘要

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 waterways can be radially tapered in addition to being axially tapered. The axially-tapered waterways can include notches extending into the cutting face of the drilling tools and/or slots enclosed within the crown of the drilling tools. Implementations of the present invention also include drilling systems including drilling tools having axially-tapered waterways, and methods of forming drilling tools having axially-tapered waterways.

主权项

1. A core-sampling drill bit, comprising:
a shank; an annular crown including a longitudinal axis therethrough, a cutting face, an inner surface, and an outer surface, the annular crown defining an interior space about the longitudinal axis configured to receive a core sample; and a plurality of waterways extending from the inner surface to the outer surface, wherein each waterway of the plurality of waterways is axially tapered whereby each waterway of the at least one waterway has a variable longitudinal dimension, wherein each waterway of the plurality of waterways is radially tapered whereby each waterway of the at least one waterway has a variable width.