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US 10,480,253 B2Granted
Cutting elements, earth-boring tools including cutting elements, and methods of forming cutting elements
AssigneeBaker Hughes, A Ge Company, LLC
InventorsChaitanya K. Vempati, Konrad T. Izbinski, Suresh G. Patel
Life of this patent
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Abstract
A cutting element comprises a cutting table of a polycrystalline hard material including a cutting face, a sidewall, and at least one peripheral cutting edge portion between the cutting face and the sidewall. A radius of curvature of the peripheral cutting edge portion is greater than a radius of curvature of at least another peripheral edge portion between the cutting face and the sidewall. An earth-boring tool may include one or more such cutting elements.
Claims20
A cutting element, comprising:
- a cutting table of a polycrystalline hard material and, prior to being exposed to wear, comprising:
- a cutting face;
- a sidewall;
- and
- a peripheral cutting edge between the cutting face and the sidewall extending around the cutting element, wherein a radius of curvature of a curved first portion of the peripheral cutting edge is greater than a radius of curvature of an adjacent curved peripheral cutting edge portion of the peripheral edge, the radius of curvature of the adjacent peripheral cutting edge portion being the same as a radius of curvature of the cutting face, wherein an origin of the radius of curvature of the adjacent curved peripheral cutting edge portion lies within a reference circle of the radius of curvature of the curved first portion, and wherein the radius of curvature of the curved first portion intersects the radius of curvature of the adjacent curved peripheral cutting edge portion on each side of the radius of curvature of the curved first portion.
2 more elements
An earth-boring tool, comprising:
- cutting elements secured to at least one structure, at least some of the cutting elements independently comprising prior to being exposed to wear:
- a cutting table comprising a polycrystalline compact of hard material, the cutting table comprising:
- a cutting face;
- a sidewall;
- and
- at least one arced peripheral cutting edge portion positioned between the cutting face and the sidewall, the at least one peripheral cutting edge portion positioned at an outermost extent of the cutting element, wherein the at least one peripheral cutting edge portion is positioned on the at least one structure at a location in which the at least one peripheral cutting edge portion will engage a subterranean formation to remove material therefrom during operation of the earth-boring tool, and wherein a radius of curvature of an outermost extent of the at least one peripheral cutting edge portion is greater than a radius of curvature of an outermost extent of the cutting table, wherein an entirety of the cutting table lies within both a first reference circle defined by the radius of curvature of the outermost extent of the at least one peripheral cutting edge portion and a second reference circle defined by the radius of curvature of the outermost extent of the cutting table.
3 more elements
An earth-boring tool, comprising:
- cutting elements secured to at least one structure, at least some of the cutting elements independently comprising:
- a cutting table comprising a polycrystalline compact of hard material, the cutting table comprising:
- a cutting face;
- at least one sidewall;
- a chamfered surface extending between the cutting face and the at least one sidewall;
- and
- peripheral cutting edge portions defined at at least one interface between the chamfered surface and the at least one sidewall, at least one peripheral cutting edge portion of the peripheral cutting edge portions being positioned at an outermost radial extent of the cutting element, wherein each peripheral cutting edge portion of the peripheral cutting edge portions is configured to be selectively positioned on the at least one structure in a position where the respective peripheral cutting edge portion will engage a subterranean formation to remove material therefrom, and wherein a radius of curvature comprising a natural number of each of the peripheral cutting edge portions is greater than a radius of curvature of at least another peripheral edge portion of the cutting table between the cutting face and the at least one sidewall, wherein an entirety of the cutting table lies within a reference circle defined by the radius of curvature of the at least another peripheral edge portion of the cutting table.
4 more elements
Dependencies are inferred from the claim text.