Patent ID: 9074429
Filing Date: 2015-07-07
Classification: E21B,Y10T

Abstract:
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, wherein at least one waterway of the plurality of waterways comprises an enclosed slot formed in the crown a first distance from the cutting face, and wherein each enclosed slot is radially positioned to not underlie any other waterway of the plurality of waterways.