Precipitated Particles and Wellbore Fluids and Methods Relating Thereto

A wellbore drilling assembly comprising:

• a pump in fluid communication with a wellbore via a feed pipe;
• a drill string with drill bit attached to the distal end of the drill string;
• and
• a wellbore fluid in contact with the drill bit, wherein the wellbore fluid has a density of about 7 ppg to about 50 ppg and comprises a base fluid and a plurality of precipitated particles having a shape selected from the group consisting of ovular, substantially ovular, discus, platelet, flake, toroidal, dendritic, acicular, spiked with a substantially spherical or ovular shape, spiked with a discus or platelet shape, rod-like, fibrous, polygonal, faceted, star-shaped, and any hybrid thereof.

A wellbore drilling assembly comprising:

• a pump capable of introducing a fluid into a wellbore via a feed pipe;
• a fluid processing unit capable of receiving the fluid from a wellbore via an interconnecting flow line;
• and
• a wellbore fluid disposed in at least one selected from the group consisting of the pump, the feed pipe, the wellbore, the interconnecting flow line, the fluid processing unit, and any combination thereof, wherein the wellbore fluid has a density of about 7 ppg to about 50 ppg and comprises a base fluid and a plurality of precipitated particles having a shape selected from the group consisting of ovular, substantially ovular, discus, platelet, flake, toroidal, dendritic, acicular, spiked with a substantially spherical or ovular shape, spiked with a discus or platelet shape, rod-like, fibrous, polygonal, faceted, star-shaped, and any hybrid thereof.