US 10,557,318 B2
Earth-boring tools having multiple gage pad lengths and related methods
Stephen Manson Slavens, Cypress, TX (US); and Zachary Borders, Spring, TX (US)
Assigned to Baker Hughes, a GE company, LLC, Houston, TX (US)
Filed by Baker Hughes, Houston, TX (US)
Filed on Nov. 14, 2017, as Appl. No. 15/812,866.
Prior Publication US 2019/0145189 A1, May 16, 2019
Int. Cl. E21B 17/10 (2006.01); E21B 10/43 (2006.01); E21B 10/55 (2006.01); E21B 10/62 (2006.01)
CPC E21B 17/1092 (2013.01) [E21B 10/43 (2013.01); E21B 10/55 (2013.01); E21B 10/62 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An earth-boring tool, comprising:
a body comprising a shank and a crown adjacent the shank;
at least one first blade extending outward from the body, the at least one first blade comprising:
an upper surface;
a first gage region having a first longitudinal length; and
a recess extending at least partially into the at least one first blade from the upper surface;
at least one second blade extending outward from the body, the at least one second blade comprising:
a second gage region having a second longitudinal length that is greater than the first longitudinal length; and
an upper external surface of the crown between the shank and each of the at least one first blade and the at least one second blade, the upper external surface being tapered radially outward in a longitudinally upward direction relative to a central axis of the earth-boring tool, wherein the upper external surface tapers radially outward to a maximum diameter substantially equal to an outer diameter of the shank.