Polycrystalline diamond compacts and applications therefor

A method of fabricating a polycrystalline diamond compact, comprising:

• mixing a plurality of diamond particles having at least trimodal distribution including:
• a first amount comprising about 15 weight % to about 40 weight % of the plurality of diamond particles that exhibits a first average particle size of about 0.5 μm to about 14 μm;
• a second amount comprising about 50 weight % to about 70 weight % of the plurality of diamond particles that exhibits a second average particle size of about 15 μm to about 24 μm;
• and
• a third amount comprising about 5 weight % to about 35 weight % of the plurality of diamond particles that exhibits a third average particle size of about 25 μm to about 40 μm;
• enclosing the plurality of diamond particles and a substrate in a pressure transmitting medium to form a cell assembly;
• and
• subjecting the cell assembly to a high-pressure/high-temperature process to form a polycrystalline diamond table bonded to the substrate, the polycrystalline diamond table including a plurality of diamond grains exhibiting diamond-to-diamond bonding therebetween.

A rotary drill bit, comprising:

• a bit body including a leading end structure configured to facilitate drilling a subterranean formation;
• and
• a plurality of cutting elements mounted to the leading end structure of the bit body, at least one of the plurality of cutting elements including:
• a substrate;
• and
• a polycrystalline diamond table bonded to the substrate, the polycrystalline diamond table including a plurality of diamond grains exhibiting diamond-to-diamond bonding therebetween, the plurality of diamond grains including:
• a first amount comprising about 15 weight % to about 40 weight % of the plurality of diamond grains that exhibits a first average grain size of about 0.5 μm to about 14 μm;
• a second amount comprising about 50 weight % to about 70 weight % of the plurality of diamond grains that exhibits a second average grain size of about 15 μm to about 24 μm;
• and
• a third amount comprising about 5 weight % to about 35 weight % of the plurality of diamond grains that exhibits a third average grain size of about 25 μm to about 40 μm.