Prior to 1909 the traditional fishtail bit scraped the rock and quickly dulled in service. The Hughes two-cone bit's revolutionary rolling action crushed hard-rock formations with twin cone-shaped, hardened steel bits, each with 166 cutting edges, revolving on bronze bearings shaped to provide a large surface with reduced friction.
Rolling Action
![Hughes Two-Cone Drill Bit](/sites/default/files/styles/landmark_node_/public/landmarks/images/Hughes_Two-Cone_Drill_Bit.jpg?itok=QKe6jnNY)
YearAdded:
Image Credit: Courtesy ASMEImage Caption: Hughes Two-Cone Drill BitEra_date_from: 1909
2009
Innovations
![Hughes Two-Cone Drill Bit](/sites/default/files/styles/thumbnail/public/landmarks/images/Hughes_Two-Cone_Drill_Bit.jpg?itok=OVXAkCNF)
Prior to 1909 the traditional fishtail bit scraped the rock and quickly dulled in service. The Hughes two-cone bit's revolutionary rolling action crushed hard-rock formations with twin cone-shaped, hardened steel bits, each with 166 cutting edges, revolving on bronze bearings shaped to provide a…
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