Patent ID: 9194187
Filing Date: 2015-11-24
Classification: E21B

Abstract:
1. A subterranean support-bolt drilling assembly, comprising: a drill bit rotatable about a central axis, the drill bit having a forward end and a rearward end axially spaced away from the forward end, the drill bit comprising at least one cutting edge; a spacer coupled to the rearward end of the drill bit, the spacer extending axially rearward from the drill bit; a reamer member coupled to a rearward end of the spacer, the reamer member comprising at least two cutting elements, each of the at least two cutting elements comprising a cutting edge that extends radially beyond an outer peripheral portion of the drill bit relative to the central axis, each of the at least two cutting elements being disposed axially rearward of the spacer, each of the at least two cutting elements comprising polycrystalline diamond, wherein: