CPC E21B 7/04 (2013.01) [E21B 7/067 (2013.01); E21B 7/068 (2013.01); E21B 17/20 (2013.01); E21B 44/00 (2013.01); E21B 44/02 (2013.01); E21B 47/013 (2020.05)] | 24 Claims |
1. A portion of a drill string comprising:
a power section;
a transmission section coupled with the power section;
a bearing portion coupled with the transmission section;
a bit portion coupled with the bearing portion;
a bend located below the power section and proximal the transmission section;
an upper positioner located above the bend, the upper positioner having a plurality of blades and flutes;
a near bit positioner located above the bit portion, the near bit positioner having a plurality of blades and flutes;
wherein the upper positioner has a shape that is axially asymmetric such that the shape of the upper positioner is asymmetric about an axis of rotation of the portion of the drill string; and
wherein the near bit positioner has a shape that is axially asymmetric such that the shape of the near bit positioner is asymmetric about the axis of rotation of the portion of the drill string.
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