Abstract: A tool includes a base with a crown extending from the base. The crown is additively manufactured on the base, forming a bond between the crown and the base. At least one protrusion may extend from the base surface into a recess in the crown, such that the crown encompasses the protrusion. The protrusion may mechanically interlock the base and the crown to improve torque transfer between the crown and base. The bond at the contact between the base and crown may include impregnating at least a portion of the crown with the material of the base, or at least a portion of base with the material of the crown, which may improve a connection between the crown and base.

Abstract: A bit includes a bit body having at least one blade coupled to the bit body. The blade has a plurality of cutting elements at a nose region and a shoulder region of the blade. A plurality of fluid outlets are positioned on the blade such that at least 30% of the cutting elements have a fluid outlet within a distance that is two or three times a cutting element diameter away from a cutting face of the cutting element.

Abstract: A cutting element may include a substrate, an upper surface of the substrate including a crest, the crest transitioning into a depressed region, and an ultrahard layer on the upper surface, thereby forming a non-planar interface between the ultrahard layer and the substrate. A top surface of the ultrahard layer includes a cutting crest extending along at least a portion of a diameter of the cutting element, the top surface having a portion extending laterally away from the cutting crest having a lesser height than a peak of the cutting crest.