Patent ID: 8685903

Claim:
A method of servicing a well bore comprising: introducing a lost circulation composition into a lost circulation zone, the lost circulation composition comprising: hydraulic cement in an amount of about 0.1% to about 25% by weight of the lost circulation composition, nano-particles in an amount of about 0.1% to about 10% by weight of the lost circulation composition, amorphous silica in an amount of about 0.1% to about 15% by weight of the lost circulation composition, clay in an amount of about 0.1% to about 2% by weight of the lost circulation composition, and water in an amount of about 60% to about 75% by weight of lost circulation composition; and allowing the lost circulation composition to set in the lost circulation zone, wherein the lost circulation composition seals the lost circulation zone and reduces loss of fluid into the lost circulation zone from subsequently introduced fluids; and preventing loss of fluid into the lost circulation zone from subsequently introduced fluids with the lost circulation composition, wherein the lost circulation composition is shear sensitive, has a 10-second static gel strength of at least about 15 lbf/100 ft 2 at room temperature, and a 10-minute static gel strength of at least about 25 lbf/100 ft 2 at room temperature.