Superabrasive elements, methods of manufacturing, and drill bits including same

摘要

Methods of manufacturing a superabrasive element are disclosed. In one embodiment, a substrate and a preformed superabrasive volume may be at least partially surrounded by an enclosure and the enclosure may be sealed in an inert environment. Further, the enclosure may be exposed to an elevated pressure and preformed superabrasive volume may be affixed to the substrate. Polycrystalline diamond elements are disclosed. In one embodiment, a polycrystalline diamond element may comprise a preformed polycrystalline diamond volume bonded to a substrate by a braze material. Optionally, such a polycrystalline diamond element may exhibit a compressive stress. Rotary drill bit for drilling a subterranean formation and including at least one superabrasive element are also disclosed.

主权项

1. A method of manufacturing a superabrasive element, the method comprising:
providing a substrate and a sintered superabrasive volume including a sintered superabrasive material; positioning the substrate and the sintered superabrasive volume within a first portion of an enclosure; subjecting the first portion and at least a second portion of the enclosure to a vacuum; before exposing the enclosure to a pressure of at least about 60 kilobar and bonding the sintered superabrasive material to the substrate, attaching together the first and second portions of the enclosure to form a seal therebetween while the enclosure is in the vacuum, thereby sealing the enclosure in the vacuum to form a sealed enclosure; exposing the sealed enclosure to the pressure of at least about 60 kilobar; and bonding the sintered superabrasive material to the substrate.