Microcapsule encapsulated microcapsule (MIM) material compositions and methods for preparing the same are provided for self-repairing cements that include a plurality of first microcapsules where each of the first microcapsule comprises a first core and a first shell and a plurality of second microcapsules that each comprise a second core and a second shell where the plurality of second microcapsules are dispersed within a continuous phase comprised within the first core of each of the first microcapsules. The MIM material may be prepared such that the first and second shell comprise a cross-linked material. Compositions for self-healing cement slurries are also provided and include cement, sand, water, and microcapsule encapsulated microcapsules (MIM) materials.

A dental device is improved in its ability to produce hydroxyl apatite by having a layer of mineral trioxide aggregate (MTA) deposited thereon. A tile of MTA is prepared, heat treated and sintered to produce a micronized tile of MTA that can then be deposited by physical vapor depositions, hot isostatic pressing, molding or other conventional technique.

Compositions and methods involving polyvalent cation reactive polymers for use as lost circulation materials in subterranean treatment operations are provided. In some embodiments, the methods include forming a treatment fluid including a base fluid, a source of a polyvalent cation, a polyvalent cation reactive polymer, and an acid precursor; introducing the treatment fluid into a wellbore penetrating at least a portion of a subterranean formation; and allowing the treatment fluid to at least partially set.

Compositions and methods involving polyvalent cation reactive polymers for use as lost circulation materials in subterranean treatment operations are provided. In some embodiments, the methods include forming a treatment fluid including a base fluid, a source of a polyvalent cation, a polyvalent cation reactive polymer, and an acid precursor; introducing the treatment fluid into a wellbore penetrating at least a portion of a subterranean formation; and allowing the treatment fluid to at least partially set.

A method of converting a drilling fluid into a geopolymer cement slurry includes introducing the drilling fluid into a wellbore, in which the drilling fluid comprises Na.sub.2SiO.sub.3, NaCl, or both. The method further includes introducing Saudi Arabian volcanic ash into the wellbore. The Saudi Arabian volcanic ash comprises SO.sub.3, CaO, SiO.sub.2, Al.sub.2O.sub.3, Fe.sub.2O.sub.3, MgO, and K.sub.2O. The method further includes allowing the Saudi Arabian volcanic ash to contact the drilling fluid in the wellbore, thereby converting the drilling fluid into the geopolymer cement slurry. A method of cementing a casing in a wellbore includes introducing a drilling fluid into a wellbore, in which the drilling fluid comprises Na.sub.2SiO.sub.3, NaCl, or both, and introducing Saudi Arabian volcanic ash into the wellbore to form the geopolymer cement slurry. The method further includes curing the geopolymer cement slurry to cement the casing in the wellbore.

A dental device is improved in its ability to produce hydroxyl apatite by having a layer of mineral trioxide aggregate (MTA) deposited thereon. A tile of MTA is prepared, heat treated and sintered to produce a micronized tile of MTA that can then be deposited by physical vapor depositions, hot isostatic pressing, molding or other conventional technique.

Methods and systems that utilize reactive metals that hydrate in the presence of a wellbore fluid. The reactive metals can be utilized in cement compositions, on the outer surface of the oilfield tubular in the form of a layer of the reactive metal(s), or on the outer surface of the oilfield tubular in the form of a layer of a composition that includes the reactive metal(s).

An asphalt composition comprising 0.1 to 10.0 wt.-% based on the total weight of the composition of a thermosetting reactive compound selected from the group consisting of polymeric MDI, epoxy resins and melamine formaldehyde resins, wherein at least 18% by weight based on the total weight of the composition are particles with a sedimentation coefficient above 5000 Sved in a white spirit solvent.

Methods and systems that utilize reactive metals that hydrate in the presence of a wellbore fluid. The reactive metals can be utilized in cement compositions, on the outer surface of the oilfield tubular in the form of a layer of the reactive metal(s), or on the outer surface of the oilfield tubular in the form of a layer of a composition that includes the reactive metal(s).

A molded three-dimensional insulator that is suitable for use in an end cone region of a pollution control device and a method of making the insulator are described. The insulator includes ceramic fibers that have a bulk shrinkage no greater than 10 weight percent. The ceramic fibers can contain alumina and silica and can be microcrystalline, crystalline, or a combination thereof.