Rotary drill bit including polycrystalline diamond cutting elements

摘要

Embodiments relate to methods of fabricating PCD materials by subjecting a mixture that exhibits a broad diamond particle size distribution to an HPHT process, PCD materials so-formed, and PDCs including a polycrystalline diamond table comprising such PCD materials. In an embodiment, a PCD material includes a plurality of bonded diamond grains that exhibit a substantially unimodal diamond grain size distribution characterized, at least in part, by a parameter θ that is less than about 1.0.;θ=x6·σ,
where x is the average grain size of the substantially unimodal diamond grain size distribution, and σ is the standard deviation of the substantially unimodal diamond grain size distribution.

主权项

1. A drill bit, comprising:
a bit body configured to engage a subterranean formation, the bit body including a plurality of blades, each of the plurality of blades including a plurality of polycrystalline diamond cutting elements, at least one of the plurality of polycrystalline diamond cutting elements including a polycrystalline diamond material including:
a plurality of bonded diamond grains, the plurality of bonded diamond grains exhibiting a substantially unimodal diamond grain size distribution characterized, at least in part, by a parameter θ that is about 0.25 to about 1.0; andwherein:θ=x6·σ; x is the average grain size of the substantially unimodal diamond grain size distribution, and is about 5 μm to about 30 μm; andσ is the standard deviation of the substantially unimodal diamond grain size distribution.