摘要:
In an embodiment, a method of fabricating a polycrystalline diamond compact (“PDC”) includes forming a polycrystalline diamond (“PCD”) table in the presence of a metal-solvent catalyst in a first high-pressure/high-temperature (“HPHT”) process. The PCD table includes bonded diamond grains defining interstitial regions, with the metal-solvent catalyst disposed therein. The method includes at least partially leaching the PCD table to remove at least a portion of the metal-solvent catalyst therefrom. The method includes subjecting the at least partially leached PCD table and a substrate to a second HPHT process under diamond-stable temperature-pressure conditions to partially infiltrate the at least partially leached PCD table with an infiltrant. A maximum temperature (T), a total process time (t), and a maximum pressure (P) of the second HPHT process are chosen so that β is about 2° Celsius·hours/gigapascals (“° C.·h/GPa”) to about 325° C.·h/GPa, with β represented as β=T·t/P.
摘要:
In an embodiment, a polycrystalline diamond compact (“PDC”) includes a substrate and a polycrystalline diamond (“PCD”) table bonded to the substrate. The PCD table includes a first PCD region having bonded-together diamond grains, with the first PCD region exhibiting a first thermal stability and a first diamond density. The PCD table further includes an intermediate second PCD region bonded to the substrate and disposed between the first PCD region and the substrate. The intermediate second PCD region includes bonded-together diamond grains. The intermediate second PCD region exhibits a second thermal stability that is less than that of the first thermal stability of the first PCD region and a second diamond density less than that of the first diamond density of the first PCD region.
摘要:
Embodiments relate to polycrystalline diamond compacts (“PDCs”) and methods of manufacturing such PDCs in which an at least partially leached polycrystalline diamond (“PCD”) table is infiltrated with a low viscosity cobalt-based alloy infiltrant. In an embodiment, a method includes forming a PCD table in the presence of a metal-solvent catalyst in a first high-pressure/high-temperature (“HPHT”) process. The method includes at least partially leaching the PCD table to remove at least a portion of the metal-solvent catalyst therefrom to form an at least partially leached PCD table. The method includes subjecting the at least partially leached PCD table and a substrate to a second HPHT process effective to at least partially infiltrate the at least partially leached PCD table with a cobalt-based alloy infiltrant having a composition at or near a eutectic composition of the cobalt-based alloy infiltrant.
摘要:
A rotary drill bit is disclosed. The rotary drill bit may include a bit body, a cutting pocket defined in the bit body, and a cutting element rotatably coupled to the bit body. The cutting element may be positioned at least partially within the cutting pocket. The rotary drill bit may also include a rotation-inducing member adjacent to the cutting element for inducing rotation of the cutting element relative to the cutting pocket. The rotation-inducing member may include a resilient member or a vibrational member. The rotary drill bit may also include protrusions extending from an interior of the cutting pocket adjacent to an outer diameter of the cutting element. A method of drilling a formation is also disclosed.
摘要:
Embodiments of the invention relate to superabrasive compacts including multiple superabrasive cutting portions and methods of fabricating such superabrasive compacts. In an embodiment, a superabrasive compact comprises a cemented carbide substrate including a first interfacial surface and a second interfacial surface longitudinally spaced from the first interfacial surface. A first superabrasive cutting portion may be bonded to the first interfacial surface of the cemented carbide substrate. The first superabrasive cutting portion includes a first working surface. A second superabrasive cutting portion may be bonded to the second interfacial surface of the cemented carbide substrate and spaced from the first superabrasive cutting portion. The second superabrasive cutting portion includes a second working surface that generally opposes the first working surface of the first superabrasive cutting portion.
摘要:
In various embodiments, a polycrystalline diamond compact (“PDC”) comprises a substrate including an interfacial surface having a raised region. In an embodiment, a PDC comprises a substrate including an interfacial surface having a generally cylindrical raised region and a peripheral region extending about the generally cylindrical raised region. The generally cylindrical raised region extends to a height above the peripheral region of about 450 μm or less. The PDC includes a PCD table bonded to the interfacial surface of the substrate. The PCD table includes an upper surface and at least one peripheral surface, and includes a plurality of bonded diamond grains defining interstitial regions. At least a portion of the interstitial regions includes a metallic constituent therein. In another embodiment, instead of employing a generally cylindrical raised region, the interfacial surface may include a plurality of raised arms extending above the face. Each raised arm extends radially and circumferentially.
摘要:
Embodiments relate to polycrystalline diamond compacts (“PDCs”) and methods of manufacturing such PDCs in which an at least partially leached polycrystalline diamond (“PCD”) table is infiltrated with a low viscosity cobalt-based alloy infiltrant. In an embodiment, a method includes forming a PCD table in the presence of a metal-solvent catalyst in a first high-pressure/high-temperature (“HPHT”) process. The method includes at least partially leaching the PCD table to remove at least a portion of the metal-solvent catalyst therefrom to form an at least partially leached PCD table. The method includes subjecting the at least partially leached PCD table and a substrate to a second HPHT process effective to at least partially infiltrate the at least partially leached PCD table with a cobalt-based alloy infiltrant having a composition at or near a eutectic composition of the cobalt-based alloy infiltrant.
摘要:
In an embodiment, a polycrystalline diamond compact (“PDC”) includes a substrate and a pre-sintered polycrystalline diamond (“PCD”) table bonded to the substrate. The pre-sintered PCD table includes an upper surface, a back surface bonded to the substrate, and at least one lateral surface extending between the upper surface and the back surface. The pre-sintered PCD table includes a region including at least a residual amount of at least one interstitial constituent disposed in at least a portion of the interstitial regions thereof, and a bonding region. The at least one interstitial constituent includes at least one metal carbonate and/or at least one metal oxide. The region extends inwardly from the upper surface and the at least one lateral surface.
摘要:
Embodiments of the invention relate to polycrystalline diamond compacts (“PDCs”) and methods of fabricating polycrystalline diamond tables and PDCs in a manner that facilitates removal of metal-solvent catalyst used in the manufacture of polycrystalline diamond tables of such PDCs.
摘要:
In various embodiments, a polycrystalline diamond compact (“PDC”) comprises a substrate including an interfacial surface having a raised region. The PDC comprises a polycrystalline diamond (“PCD”) table bonded to the interfacial surface of the substrate. The PCD table defines an upper surface and exhibits a thickness over the raised region. The PCD table includes a plurality of bonded diamond grains defining a plurality of interstitial regions. A first region of the PCD table adjacent to the substrate includes metal-solvent catalyst disposed interstitially between the bonded diamond grains thereof, and a leached second region of the PCD table extends inwardly from the upper surface. The interstitial regions of the leached second region are depleted of metal-solvent catalyst. The geometry of the PCD table and raised region may be selected so that residual compressive stresses therein are retained to a sufficient level after leaching to provide a damage tolerant/thermally-stable PCD table.