Patent ID: 9353577
Filing Date: 2016-05-31
CPC Classification: E21B,G06F

Claim Text:
1. A rotary drill bit for drilling a cavity in a medium, wherein the rotary drill bit comprises: a bit body, wherein the bit body comprises: a distal end having a drilling face; and a proximal end, having a rotational power source coupling mechanism; and a plurality of cutters coupled with the drilling face of the bit body, wherein the plurality of cutters comprises at least six groups of cutters, wherein each group of cutters is substantially aligned along a different radius of the drilling face; and wherein the azimuthal distribution of said groups of cutters is non-symmetric around the axis of the drilling face and wherein: the radius along which the second group of cutters is substantially aligned is substantially a first angle (A) in pitch from the radius along which the first group of cutters is substantially aligned; the radius along which the third group of cutters is substantially aligned is substantially the first angle (A) minus a second angle (θ), (A−θ), in pitch from the radius along which the second group of cutters is substantially aligned; the radius along which the fourth group of cutters is substantially aligned is substantially the first angle (A) plus the second angle (θ), (A+θ), in pitch from the radius along which the second group of cutters is substantially aligned; the radius along which the fifth group of cutters is substantially aligned is substantially the first angle (A) in pitch from the radius along which the fourth group of cutters is substantially aligned; and the radius along which the sixth group of cutters is substantially aligned is substantially the first angle (A) minus two times the second angle (θ), (A−2×θ), in pitch from the radius along which the fifth group of cutters is substantially aligned, wherein the second angle θ is substantially greater than zero degree.