作者: Francis E. Leany , Joe Fox , David R. Hall , Tyson J. Wilde
DOI:
关键词: Engineering 、 Drill bit 、 Surface (mathematics) 、 Structural engineering 、 Bit (horse) 、 Coaxial 、 Conical surface 、 Geometry
摘要: In one aspect of the present invention, a drill bit has an axis rotation and working face with plurality blades extending outwardly from body. The form in part inverted conical region cutters cutting surface are arrayed along blades. A jack element is coaxial extend within range defined by at least cutter.