Impregnated diamond cutting structures
AssigneeSmith International, Inc.
InventorsGreg Lockwood, Thomas W. Oldham, Anthony Griffo, Madapusi K. Keshavan, David A. Conroy
Life of this patent
Estimating the term…
Abstract
An insert for a drill bit that includes diamond particles disposed in a matrix material, wherein the diamond particles have a contiguity of 15% or less is disclosed. A method of forming a diamond-impregnated cutting structure, that includes loading a plurality of substantially uniformly coated diamond particles into a mold cavity, pre-compacting the substantially uniformly coated diamond particles using a cold-press cycle, and heating the compacted, substantially uniformly coated diamond particles with a matrix material to form the diamond impregnated cutting structure is also disclosed.
Claims15
An insert for a drill bit comprising:
- diamond particles disposed in a matrix material, wherein the diamond particles have a contiguity of 15% or less, the diamond particles comprise a matrix powder coating thereon, which comprises at least one material selected from tungsten carbide, cast tungsten carbide, sintered tungsten carbide-cobalt (WC—Co), and tungsten carbide in combination with elemental tungsten.
An impreg drill bit comprising:
- a bit body;
- and
- a plurality of ribs formed in the bit body, the ribs being infiltrated with a plurality of diamond particles, wherein the diamond particles have a contiguity of 15% or less, the diamond particles comprise a matrix powder coating thereon, which comprises at least one material selected from tungsten carbide, cast tungsten carbide, sintered tungsten carbide-cobalt (WC—Co), and tungsten carbide in combination with elemental tungsten.
An insert for a drill bit comprising:
- abrasive particles disposed in a matrix material, wherein the abrasive particles have a contiguity of 15% or less, the abrasive particles comprise a matrix powder coating thereon, which comprises at least one material selected from tungsten carbide, cast tungsten carbide, sintered tungsten carbide-cobalt (WC—Co), and tungsten carbide in combination with elemental tungsten.
Dependencies are inferred from the claim text.