Abstract: The present disclosure relates to an industrial device including a PCD element located in a recess of the industrial device. The PCD element and recess may contain an aligned mechanical lock. The device may also include a brazing material located along at least a portion of an interface between the PCD element and the recess. In a more specific embodiment, the industrial device may be an earth-boring drill bit, such as a fixed cutter drill bit, and the PCD element may be PCD cutter. In specific embodiments, the mechanical lock may include at least one ridge located at an end of the PCD element and in an end wall of the recess, at least one ridge located along a side of the PCD element and in a side wall of the recess, or at least an upper wall of the recess.

Abstract: The present disclosure relates to an industrial device including a PCD element located in a recess of the industrial device. The PCD element and recess may contain an aligned mechanical lock. The device may also include a brazing material located along at least a portion of an interface between the PCD element and the recess. In a more specific embodiment, the industrial device may be an earth-boring drill bit, such as a fixed cutter drill bit, and the PCD element may be PCD cutter. In specific embodiments, the mechanical lock may include at least one ridge located at an end of the PCD element and in an end wall of the recess, at least one ridge located along a side of the PCD element and in a side wall of the recess, or at least an upper wall of the recess.

Abstract: A well tool can include multiple sections, one section having a mating weld surface formed thereon, and another section having another mating weld surface formed thereon. Engagement between the mating weld surfaces can prevent lateral displacement of the well tool sections relative to each other. The mating weld surfaces are welded to each other. A method of constructing a well tool can include engaging a mating weld surface on a section of the well tool with another mating weld surface on another section of the well tool, an interface between the mating weld surfaces being inclined relative to a longitudinal axis of the well tool extending through the sections, and welding the mating weld surfaces to each other along the interface.

Abstract: Matrix drill bits and other downhole tools may be formed with one or more layers of hard materials disposed on exterior portions thereof. Exterior portions of used rotary drill bits or other downhole tools may be measured using three dimensional (3D) scanning techniques or other techniques to determine specific locations of undesired abrasion, erosion and/or wear. During the design of a new rotary drill bit or other downhole tool, computational flow analysis techniques may be used to determine potential locations for excessive erosions, abrasion, wear, impact and/or fatigue on exterior portions of the rotary drill bit or other downhole tools. One or more layers of hard material may be disposed at such locations on exterior portions of matrix bit bodies and other matrix bodies based on analyzing exterior portions of used downhole tools and/or computational flow analysis.

Abstract: A hardfacing is provided to protect surfaces of drill bits and other downhole tools. The hardfacing may include tungsten carbide particles or pellets formed with an optimum weight percentage of binding material and dispersed within and bonded to a matrix deposit. The tungsten carbide particles may be formed by sintering or other appropriate techniques. The tungsten carbide particles may have generally spherical shapes, partially spherical shapes or non-spherical shapes.

Abstract: Matrix drill bits and other downhole tools may be formed with one or more layers of hard materials disposed on exterior portions thereof. Exterior portions of used rotary drill bits or other downhole tools may be measured using three dimensional (3D) scanning techniques or other techniques to determine specific locations of undesired abrasion, erosion and/or wear. During the design of a new rotary drill bit or other downhole tool, computational flow analysis techniques may be used to determine potential locations for excessive erosions, abrasion, wear, impact and/or fatigue on exterior portions of the rotary drill bit or other downhole tools. One or more layers of hard material may be disposed at such locations on exterior portions of matrix bit bodies and other matrix bodies based on analyzing exterior portions of used downhole tools and/or computational flow analysis.

Abstract: A hardfacing is provided to protect surfaces of drill bits and other downhole tools. The hardfacing may include tungsten carbide particles or pellets formed with an optimum weight percentage of binding material and dispersed within and bonded to a matrix deposit. The tungsten carbide particles may be formed by sintering or other appropriate techniques. The tungsten carbide particles may have generally spherical shapes, partially spherical shapes or non-spherical shapes.

Abstract: Using inserts which are welded in place allows the use of hardfacing in the immediate vicinity of the inserts. Areas of high wear, such as cutting structures and gage areas, can use a combination of ultra-hard inserts with hardfacing for protection against wear. The inserts slows wear, while the hardfacing prevents erosion around the inserts.

Abstract: Using inserts which are welded in place allows the use of hardfacing in the immediate vicinity of the inserts. Areas of high wear, such as cutting structures and gage areas, can use a combination of ultra-hard inserts with hardfacing for protection against wear. The inserts slows wear, while the hardfacing prevents erosion around the inserts.

Abstract: A drill bit (20) for a modular arm (70) is provided. The modular arm (70) includes an inside surface (76) having first (144) and second (146) angled surfaces whose lower portions form an inwardly projecting wedge (125). A curved throat relief area (87) connects to a lower edge (152) of the wedge (125). A pocket (54) in the drill bit (20) is sized to receive the support arm (70). The pocket (54) includes a wedge-shaped recess (121) sized to receive the wedge (125) of the support arm (70). A triangular weld groove (126) is provided in the convex surface of the bit body (40). A length of weld (128) is applied in the weld groove (126) for firmly securing the support arm (70) to the bit body (40).

Abstract: A milled tooth (22) is provided having a back face (38), including an upper back face surface (58) and a lower back face surface (60). A tip or top surface (36) is provided below the upper back face surface (58). The upper back face surface (58) is in a recessed position relative to the lower back face surface (60). A gage rib guide (64) runs along one side of the lower back face surface (60). A layer of hardfacing material (33) is applied to the milled tooth (22) so that the layer (72) applied to the lower back face (60) surface is flush with the gage rib guide (64) and the layer (74) of hardfacing material (33) is thickest in the region of the upper back face surface (58).

Abstract: A rotary cone drill bit for forming a borehole having a body with an underside and an upper end portion adapted for connection to a drill string. The drill bit rotates around a central axis of the body. A number of angularly-spaced arms are integrally formed with the body and depend therefrom. Each arm has an inside surface with a spindle connected thereto and an outer shirttail surface. Each spindle projects generally downwardly and inwardly with respect to the central axis, has a generally cylindrical upper end portion connected to the inside surface, and has an inner sealing surface within the upper end portion. A number of rotary cone cutters equal to the number of arms are each mounted on one of the spindles.

Abstract: A rotary cone drill bit for forming a borehole having a body with an underside and an upper end portion adapted for connection to a drill string. The drill bit rotates around a central axis of the body. A number of angularly-spaced arms are integrally formed with the body and depend therefrom. Each arm has an inside surface with a spindle connected thereto and an outer shirttail surface. Each spindle projects generally downwardly and inwardly with respect to the central axis, has a generally cylindrical upper end portion connected to the inside surface, and has an inner sealing surface within the upper end portion. A number of rotary cone cutters equal to the number of arms are each mounted on one of the spindles.

Abstract: A rotary cone drill bit for forming a borehole having a body with an underside and an upper end portion adapted for connection to a drill string. The drill bit rotates around a central axis of the body. A number of angularly-spaced arms are integrally formed with the body and depend therefrom. Each arm has an inside surface with a spindle connected thereto and an outer shirttail surface. Each spindle projects generally downwardly and inwardly with respect to its associated arm, has a generally cylindrical upper end portion connected to the associated inside surface, and has an inner sealing surface on the upper end portion. A number of rotary cone cutters equal to the number of arms are each mounted on respective spindles.

Abstract: The disclosed invention describes a method for cladding surfaces of an earth boring apparatus, or the like, with a hardfacing material having an entrained, or encapsulated, heavy metal refractory carbide. The method includes heating the surface to the incipient melting temperature and applying a molten super-alloy matrix material that has a melting temperature below the melting temperature of the carbide. The super-alloy, in a powder form, is pre-mixed with the carbide material, also in a powder form, such that, when the molten surface and the molten super-alloy cool, they form a metallurgical bond, at the surface, with the carbide material mechanically retained within the solidified matrix material.

Abstract: The disclosed invention describes a method for cladding surfaces of an earth boring apparatus, or the like, with a hardfacing material having an entrained, or encapsulated, heavy metal refractory carbide. The method includes heating the surface to the incipient melting temperature and applying a molten super-alloy matrix material that has a melting temperature below the melting temperature of the carbide. The super-alloy, in a powder form, is pre-mixed with the carbide material, also in a powder form, such that, when the molten surface and the molten super-alloy cool, they form a metallurgical bond, at the surface, with the carbide material mechanically retained within the solidified matrix material.