This invention relates to a method for producing a supplementary cementitious material comprising the steps: providing a starting material containing dolomite and aluminium silicate, converting the starting material to the supplementary cementitious material by burning under reducing conditions in the temperature range of >700 to 1100 C. or by burning in the temperature range of 625 to 950 C. in the presence of a mineraliser, and cooling the supplementary cementitious material. The invention further relates to a binder comprising cement and to the ground supplementary cementitious material.

This invention relates to a method for producing a supplementary cementitious material comprising the steps: providing a starting material containing dolomite and aluminium silicate, converting the starting material to the supplementary cementitious material by burning under reducing conditions in the temperature range of >700 to 1100 C. or by burning in the temperature range of 625 to 950 C. in the presence of a mineraliser, and cooling the supplementary cementitious material. The invention further relates to a binder comprising cement and to the ground supplementary cementitious material.

A downhole treatment composition comprises a rare earth-containing compound comprising one or more of the following: scandium; yttrium; lanthanum; cerium; praseodymium; neodymium; promethium; samarium; lutetium; europium; gadolinium; terbium; dysprosium; holmium; erbium; thulium; or ytterbium, wherein the downhole treatment composition is a cement slurry, a drilling fluid, or a spacer fluid. Also disclosed are methods of cementing a wellbore, methods of displacing a first fluid, and methods of drilling a wellbore in a subterranean formation using the cement slurry, the spacer fluid, or the drilling fluid.

A downhole treatment composition comprises a rare earth-containing compound comprising one or more of the following: scandium; yttrium; lanthanum; cerium; praseodymium; neodymium; promethium; samarium; lutetium; europium; gadolinium; terbium; dysprosium; holmium; erbium; thulium; or ytterbium, wherein the downhole treatment composition is a cement slurry, a drilling fluid, or a spacer fluid. Also disclosed are methods of cementing a wellbore, methods of displacing a first fluid, and methods of drilling a wellbore in a subterranean formation using the cement slurry, the spacer fluid, or the drilling fluid.

Embodiments of the present invention described herein relate to fiberglass materials, composite glass materials, methods of making fiberglass materials and composite glass materials, and different applications of fiberglass materials and composite glass materials. The fiberglass materials can include a bimodal particle size distribution. The fiberglass materials can include an average aspect ratio of greater than about 2 to 1. Also described herein are composite glass materials including a first glass material and a second material. The second material can include at least one of post-consumer glass waste, fly ash, metakaolin, and slag. Also described herein are methods of making a composite glass material including providing a first glass material to a mixer; providing a second material to the mixer; and co-milling the first glass material and a second material to form a composite glass material.

A budding material based on calcium hydroxide, in which the main component is lime of the type known as hydrated lime, which is mixed a filler of organic and/or mineral origin to produce a structural mass comprising of the basic component and the filler. A defined volume of water, calculated as a function of the volume of the structural mass, is added thereto to produce a paste that can be worked and is capable of hardening. To ensure setting of the material, an additive comprising at least one powder based on natural materials of volcanic origin is added to the pasty structural mass. The additive is preferably pozzolana and the filler advantageously comprises shavings or fibers of substances, preferably of vegetable origin such as hemp or wood.

A budding material based on calcium hydroxide, in which the main component is lime of the type known as hydrated lime, which is mixed a filler of organic and/or mineral origin to produce a structural mass comprising of the basic component and the filler. A defined volume of water, calculated as a function of the volume of the structural mass, is added thereto to produce a paste that can be worked and is capable of hardening. To ensure setting of the material, an additive comprising at least one powder based on natural materials of volcanic origin is added to the pasty structural mass. The additive is preferably pozzolana and the filler advantageously comprises shavings or fibers of substances, preferably of vegetable origin such as hemp or wood.

A macro-cement and associated methods useful for preparing pastes, mortars, concretes and other cement-based materials having high workability, high density, and high strength are disclosed. A method of producing a macro-cement includes cement, supplemental cementitious materials (SCM's), including siliceous submicron-sized particles and nano-sized particles, and polymers in the form of liquid or dry chemical admixtures for concrete. The cement mixture may be used for making ultra-high performance concrete (UHPC).

A macro-cement and associated methods useful for preparing pastes, mortars, concretes and other cement-based materials having high workability, high density, and high strength are disclosed. A method of producing a macro-cement includes cement, supplemental cementitious materials (SCM's), including siliceous submicron-sized particles and nano-sized particles, and polymers in the form of liquid or dry chemical admixtures for concrete. The cement mixture may be used for making ultra-high performance concrete (UHPC).

The current invention relates to the use of chitin nanocrystals and chitin nanocrystal derivatives. More specifically, the present invention relates to the use of chitin nanocrystals and chitin nanocrystals used in oil and gas operations. The chitin nanocrystals and chitin nanocrystals derivatives can be used as additives to cement and wellbore fluids and can be used to inhibit corrosion in pipelines, on downhole tools and on other oil and gas related equipment.