A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion and an ester activator. The alkaline nanosilica dispersion and the ester activator may form a gelled solid after interaction over a contact period. Methods of lost circulation control using the LCM are also provided.

A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion and an ester activator. The alkaline nanosilica dispersion and the ester activator may form a gelled solid after interaction over a contact period. Methods of lost circulation control using the LCM are also provided.

A method for controlling loss circulation. The method includes introducing into a wellbore a nanosilica drilling fluid comprising water and an alkaline nanosilica dispersion. The method further includes introducing into the nanosilica drilling fluid an amount of a chemical activator comprising a water soluble hydrolysable polyester to produce a convertible drilling mud where the convertible drilling mud has an initial pH between 8 and 11 upon formation. The method also includes allowing the chemical activator to hydrolyze to produce an acid and reduce the pH of the convertible drilling mud to less than a gel pH, thereby converting the convertible drilling mud into a solid gel lost circulation material. A convertible drilling mud operable to convert into a solid gel lost circulation material is also provided.

A method for controlling loss circulation. The method includes introducing into a wellbore a nanosilica drilling fluid comprising water and an alkaline nanosilica dispersion. The method further includes introducing into the nanosilica drilling fluid an amount of a chemical activator comprising a water soluble hydrolysable polyester to produce a convertible drilling mud where the convertible drilling mud has an initial pH between 8 and 11 upon formation. The method also includes allowing the chemical activator to hydrolyze to produce an acid and reduce the pH of the convertible drilling mud to less than a gel pH, thereby converting the convertible drilling mud into a solid gel lost circulation material. A convertible drilling mud operable to convert into a solid gel lost circulation material is also provided.

A curing agent comprising methyl isobutyl ketone peroxide and at least one peroxide.

The present invention relates to a process for preparing a particle-stabilized inorganic foam based on calcium sulfoaluminate, to a particle-stabilized inorganic foam based on calcium sulfoaluminate, to a cellular material obtainable by hardening and optionally drying the particle-stabilized inorganic foam based on calcium sulfoaluminate, and to a composition for preparing an inorganic foam formulation for providing a particle-stabilized inorganic foam based on calcium sulfoaluminate.

The present invention relates to a process for preparing a particle-stabilized inorganic foam based on calcium sulfoaluminate, to a particle-stabilized inorganic foam based on calcium sulfoaluminate, to a cellular material obtainable by hardening and optionally drying the particle-stabilized inorganic foam based on calcium sulfoaluminate, and to a composition for preparing an inorganic foam formulation for providing a particle-stabilized inorganic foam based on calcium sulfoaluminate.

In an embodiment, a resin formulation is provided. The resin formulation includes a curable resin; a hardener, wherein a concentration of hardener is from 15 wt % to 80 wt % based on a total weight of the curable resin; and a surfactant, wherein a concentration of surfactant is from 0.1 wt % to 5 wt % based on the total weight of the curable resin. In another embodiment, a method of treating a wellbore is provided. The method includes adding to a subterranean wellbore a volume of a resin formulation, the resin formulation comprising a curable resin, a hardener, and a surfactant; and allowing the resin formulation to form a sealant.

The present invention relates to a process for preparing a particle-stabilized inorganic foam based on geopolymers, to a particle-stabilized inorganic foam based on geopolymers, to a cellular material obtainable by hardening and optionally drying the particle-stabilized inorganic foam based on geopolymers, and to a composition for preparing an inorganic foam formulation for providing a particle-stabilized inorganic foam based on geopolymers.

The present invention relates to a process for preparing a particle-stabilized inorganic foam based on geopolymers, to a particle-stabilized inorganic foam based on geopolymers, to a cellular material obtainable by hardening and optionally drying the particle-stabilized inorganic foam based on geopolymers, and to a composition for preparing an inorganic foam formulation for providing a particle-stabilized inorganic foam based on geopolymers.