Rotary drill bit including polycrystalline diamond cutting elements

A rotary drill bit, comprising:

• a bit body including a leading end structure configured to facilitate drilling a subterranean formation;
• and
• a plurality cutting elements mounted to the bit body, at least one of the cutting elements including a polycrystalline diamond table bonded to a substrate, at least an un-leached portion of the polycrystalline diamond table including:
• a plurality of diamond grains defining a plurality of interstitial regions;
• a metal-solvent catalyst occupying at least a portion of the plurality of interstitial regions, the metal-solvent catalyst present in an amount of about 1 weight % to about 6 weight %;
• wherein the plurality of diamond grains and the metal-solvent catalyst collectively exhibit a specific magnetic saturation of about 15 Gauss·cm3/grams (“G·cm3/g”) or less;
• wherein the plurality of diamond grains and the metal-solvent catalyst collectively define a volume of at least about 0.050 cm3;
• and
• wherein the plurality of diamond grains and the metal-solvent catalyst of the at least an un-leached portion of the polycrystalline diamond table collectively exhibit a specific permeability of about 0.060 G·cm3/g·Oersteds to about 0.090 G·cm3/g·Oersteds.

A rotary drill bit, comprising:

• a bit body including a leading end structure configured to facilitate drilling a subterranean formation;
• and
• a plurality cutting elements mounted to the bit body, at least one of the cutting elements including a polycrystalline diamond table bonded to a substrate, at least an un-leached portion of the polycrystalline diamond table including:
• a plurality of diamond grains defining a plurality of interstitial regions, the plurality of diamond grains exhibiting an average grain size of about 20 μm or less;
• a metal-solvent catalyst occupying at least a portion of the plurality of interstitial regions, the metal-solvent catalyst present in an amount of about 3 weight % to about 6 weight %;
• wherein the plurality of diamond grains and the metal-solvent catalyst collectively exhibit a coercivity of about 115 Oersteds (“Oe”) or more;
• and
• wherein the plurality of diamond grains and the metal-solvent catalyst collectively exhibit a specific magnetic saturation of about 15 Gauss·cm3/grams (“G·cm3/g”) or less, indicative of the amount of metal-solvent catalyst.

A rotary drill bit, comprising:

• a bit body including a leading end structure configured to facilitate drilling a subterranean formation;
• and
• a plurality cutting elements mounted to the bit body, at least one of the cutting elements including a polycrystalline diamond table bonded to a substrate, at least an un-leached portion of the polycrystalline diamond table including:
• a plurality of diamond grains defining a plurality of interstitial regions, the plurality of diamond grains exhibiting an average grain size of about 30 μm or less;
• a metal-solvent catalyst occupying at least a portion of the plurality of interstitial regions, the metal-solvent catalyst present in an amount of about 1 weight % to about 6 weight %;
• wherein the plurality of diamond grains and the metal-solvent catalyst collectively exhibit a coercivity of about 115 Oersteds (“Oe”) or more;
• and
• wherein the plurality of diamond grains and the metal-solvent catalyst collectively exhibit a specific magnetic saturation of about 15 Gauss·cm3/grams (“G·cm3/g”) or less, indicative of the amount of metal-solvent catalyst.