Abstract: Various drill bits, drilling systems and related methods are provided. In one embodiment, a drill bit comprises a bit body having a face and a shank, at least one insert having a convex engagement surface coupled with the face and at least one wear insert coupled with the shank. In one particular embodiment, the at least one wear insert may be positioned immediately adjacent a coupling end of the shank. The at least one wear insert may include a superabrasive table which may be bonded with a substrate. The at least one wear insert includes a wear surface defined in the superabrasive table. In one embodiment, the superabrasive table may comprise polycrystalline diamond. Similarly, the inset having a convex engagement surface may include a superabrasive material, such as polycrystalline diamond, bonded with a substrate. Such a drill bit may be used, for example, in a top hammer percussion drilling operation.

Abstract: Various drill bits, drilling systems and related methods are provided. In one embodiment, a drill bit comprises a bit body having a face and a shank, at least one insert having a convex engagement surface coupled with the face and at least one wear insert coupled with the shank. In one particular embodiment, the at least one wear insert may be positioned immediately adjacent a coupling end of the shank. The at least one wear insert may include a superabrasive table which may be bonded with a substrate. The at least one wear insert includes a wear surface defined in the superabrasive table. In one embodiment, the superabrasive table may comprise polycrystalline diamond. Similarly, the inset having a convex engagement surface may include a superabrasive material, such as polycrystalline diamond, bonded with a substrate. Such a drill bit may be used, for example, in a top hammer percussion drilling operation.

Abstract: Embodiments disclosed herein are directed to a system for removing road material. In an embodiment, the system may include a milling drum and at least one pick mounted on the milling drum. The pick may include polycrystalline diamond at least partially forming one or more working surfaces of the pick.

Abstract: Embodiments of the invention are directed to cutting tool assemblies, material-removing machines that include cutting tool assemblies, and methods of use and operation thereof. In some embodiments, the cutting tool assemblies described herein may be used in material-removing machines that may remove target material. For example, the cutting tool assemblies may include one or more superhard working surfaces and/or one or more shields.

Abstract: Embodiments described herein relate to material-removal systems and cutting tools that may be used in the material-removal systems. More specifically, for example, the material-removal systems, and particularly the cutting tools thereof, may engage and fail target material. In some instances, the material-removal systems may be used in mining operations.

Abstract: Embodiments described herein relate to material-removal systems and cutting tools that may be used in the material-removal systems. More specifically, for example, the material-removal systems, and particularly the cutting tools thereof, may engage and fail target material. In some instances, the material-removal systems may be used in mining operations.

Abstract: A method for manufacturing a roof-bolt drill bit may include forming at least one coupling pocket in a bit body by (1) forming a pocket back surface, (2) forming a first pocket side surface including a substantially planar surface extending from the pocket back surface, and (3) forming a second pocket side surface including a substantially planar surface extending from the pocket back surface, the second pocket side surface being nonparallel to the first pocket side surface. The at least one coupling pocket may be defined by the pocket back surface, the first pocket side surface, and the second pocket side surface. The first pocket side surface may extend at an angle of between approximately 45° and approximately 90° relative to the second pocket side surface, and the first pocket side surface and the second pocket side surface may be separated from one another.

Abstract: A subterranean support-bolt drill bit has a bit body rotatable about a central axis, the bit body having a forward end and a rearward end axially spaced away from the forward end. The support-bolt drill bit includes at least one bit cutting element coupled to the bit body, the at least one bit cutting element including a cutting edge. The support-bolt drill bit also includes a central pilot projecting from the bit body beyond the at least one bit cutting element in an axially forward direction, the central pilot including a pilot cutting edge.

Abstract: A roof-bolt drill bit includes a bit body that is rotatable about a central axis, a coupling pocket defined in the bit body, and at least one cutting element mounted to the bit body. The at least one cutting element includes a cutting face, a cutting edge adjacent the cutting face, a back surface opposite the cutting face, and a side surface extending between the cutting edge and the back surface. The roof-bolt drill bit additionally includes a coupling attachment coupled to the bit body, the coupling attachment being positioned adjacent to a portion of the side surface of the cutting element that abuts a side surface of the coupling pocket.

Abstract: A method includes rotating a rotary drill bit about a central axis in a rotational direction. The rotary drill bit includes a bit body having a forward end and a rearward end and a plurality of cutting elements coupled to the bit body. Each of the plurality of cutting elements includes a substrate, polycrystalline diamond bonded to the substrate, a substantially planar, substantially semi-circular cutting face, a cutting edge adjacent the cutting face, and a side surface that extends in a direction substantially perpendicular to the cutting face. The method also includes moving the rotary drill bit in an axially forward direction while rotating the rotary drill bit such that the plurality of cutting elements cut into a formation and removing debris generated by the plurality of cutting elements.

Abstract: Embodiments of the invention generally relate to tunnel boring machine cutter assemblies, such as ripping and scraping cutter or tool assemblies, (collectively “cutter assemblies”), and related methods of use and manufacturing. The various embodiments of the cutter assemblies described herein may be used in tunnel boring machines (“TBMs”), earth pressure balance machines (“EPBs”), raise drilling systems, large diameter blind drilling systems, and other types of mechanical drilling and excavation systems.

Abstract: Embodiments disclosed herein are directed to a system for removing road material. In an embodiment, the system may include a milling drum and at least one pick mounted on the milling drum. The pick may include polycrystalline diamond at least partially forming one or more working surfaces of the pick.

Abstract: A subterranean support-bolt drill bit includes a bit body rotatable about a central axis and at least one cutting element mounted to the bit body. The at least one cutting element has a cutting face, a cutting edge adjacent the cutting face, and a back surface opposite the cutting face. A first recess is defined in the bit body and positioned adjacent the at least one cutting element. A first opening extends through a portion of the bit body, the first opening extending from the first recess. A coupling projection extends from the back surface of the at least one cutting element, the coupling projection being positioned within the first recess and bonded to the coupling recess by brazing. A coupling attachment extends through the first opening and is attached to the coupling projection.