EARTH-BORING TOOLS INCLUDING CUTTING ELEMENT PROFILES CONFIGURED TO REDUCE WORK RATES

摘要

Earth-boring tools may include a body including blades projecting therefrom, an axis of rotation, and cutting elements secured to the blades. A profile of the cutting elements intersecting outermost points of cutting faces of the cutting elements as viewed projected rotationally onto a plane may be parabolic from immediately proximate the axis of rotation to a nose point at which a slope of the profile is such that an angle between the profile and a plane perpendicular to the axis of rotation is about 0°. In other embodiments, a first section of the profile may extend at a first slope, and a second section of the profile may extend at a second, different slope. In still other embodiments, a tangent line to the profile may be oriented at an angle of at least 15° at a location proximate to the axis of rotation.