Abstract: Methods of subterranean cementing involving cement compositions comprising particulate foamed elastomers and associated methods are provided. In one embodiment, the methods comprise introducing a cement composition into a subterranean location, wherein the cement composition comprises a hydraulic cement, a particulate foamed elastomer, and an aqueous fluid; and allowing the cement composition to set in the subterranean location.

Abstract: A liquid concentrate for use in a well that penetrates a subterranean formation comprising: a base liquid; and a strength retrogression additive, wherein the strength retrogression additive consists of particles of silicon dioxide containing crystalline regions, wherein the liquid concentrate has an activity of at least 40%.

Abstract: A device for testing the amount of free fluid in a colloid comprises: a first container, wherein the first container has a central axis that spans the length of the first container, wherein the length of the first container is greater than the width and height of the first container, and wherein the central axis of the first container is oriented in a substantially horizontal position during the testing. Methods of using the device include: optically determining the height of free fluid in the container after the period of time has elapsed and using a formula to determine the volume of the free fluid; or removing a plug from a plug tube that is operationally connected to the container; and draining the free fluid from the container into a measurement device.

Abstract: This invention is generally related to using treatment fluids having additives that modify rheological characteristics. Some embodiments of the present invention provide methods of using treatment fluids comprising an aqueous fluid and an associative polymer additive, wherein the associative polymer additive increases the PV of the treatment fluid by more than at least 50% and wherein the associative polymer additive increases the yield point by no more than about 30% of the corresponding increase in the PV relative to a treatment fluid without the associative polymer additive in a portion of a subterranean formation.

Abstract: Methods of subterranean cementing involving cement compositions comprising particulate foamed elastomers and associated methods are provided. In one embodiment, the methods comprise introducing a cement composition into a subterranean location, wherein the cement composition comprises a hydraulic cement, a particulate foamed elastomer, and an aqueous fluid; and allowing the cement composition to set in the subterranean location.

Abstract: A device for testing the amount of free fluid in a colloid comprises: a first container, wherein the first container has a central axis that spans the length of the first container, wherein the length of the first container is greater than the width and height of the first container, and wherein the central axis of the first container is oriented in a substantially horizontal position during the testing. Methods of using the device include: optically determining the height of free fluid in the container after the period of time has elapsed and using a formula to determine the volume of the free fluid; or removing a plug from a plug tube that is operationally connected to the container; and draining the free fluid from the container into a measurement device.

Abstract: Methods of subterranean cementing involving cement compositions comprising particulate foamed elastomers and associated methods are provided. In one embodiment, the methods comprise introducing a cement composition into a subterranean location, wherein the cement composition comprises a hydraulic cement, a particulate foamed elastomer, and an aqueous fluid; and allowing the cement composition to set in the subterranean location. In one embodiment, the particulate foamed elastomer may comprise polyurethane foam.

Abstract: A treatment fluid comprising an aqueous liquid and an associative polymer additive. The associative polymer additive increases the plastic viscosity (PV) of an aqueous liquid by more than at least 50% and wherein the associative polymer additive increases the yield point (YP) by no more than about 30% of the corresponding increase in the PV relative to an aqueous liquid without the associative polymer additive. Moreover, the viscosity of the aqueous liquid comprising the associative polymer additive is capable of maintaining a viscosity of greater than about 20 cP for at least 20 minutes at temperatures higher than about 275° F. In some cases the associative polymer additive may be a hydrophobic alkoxylated aminoplast.

Abstract: Methods of subterranean cementing involving cement compositions comprising particulate foamed elastomers and associated methods are provided. In one embodiment, the cement composition comprises a hydraulic cement, a particulate foamed elastomer, and an aqueous fluid. In one embodiment, the particulate foamed elastomer may comprise polyurethane foam.

Abstract: A treatment fluid comprising an aqueous liquid and an associative polymer additive. The associative polymer additive increases the plastic viscosity (PV) of an aqueous liquid by more than at least 50% and wherein the associative polymer additive increases the yield point (YP) by no more than about 30% of the corresponding increase in the PV relative to an aqueous liquid without the associative polymer additive. Moreover, the viscosity of the aqueous liquid comprising the associative polymer additive is capable of maintaining a viscosity of greater than about 20 cP for at least 20 minutes at temperatures higher than about 275° F. In some cases the associative polymer additive may be a hydrophobic alkoxylated aminoplast.

Abstract: Methods of subterranean cementing involving cement compositions comprising particulate foamed elastomers and associated methods are provided. In one embodiment, the cement composition comprises a hydraulic cement, a particulate foamed elastomer, and an aqueous fluid. In one embodiment, the particulate foamed elastomer may comprise polyurethane foam.

Abstract: A method of servicing a wellbore comprising contacting a wellbore servicing composition with a rheology modifying additive wherein the rheology modifying additive comprises a gum and a polymeric material. A method of cementing in a subterranean formation comprising providing a sealant composition comprising cement, water, and a rheology modifying additive wherein the rheology modifying additive comprises a gum and an anionic polymer, placing the composition in the subterranean formation, and allowing the cement composition to set therein.

Abstract: This invention is generally related to using treatments fluids having additives that modify rheological characteristics. Some embodiments of the present invention provide methods of using treatment fluids comprising an aqueous fluid and an associative polymer additive, wherein the associative polymer additive increases the PV of the treatment fluid by more at least 50% and wherein the associative polymer additive increases the yield point by no more than about 30% of the corresponding increase in the PV relative to a treatment fluid without the associative polymer additive in a portion of a subterranean formation.

Abstract: Methods of subterranean cementing involving cement compositions comprising particulate foamed elastomers and associated methods are provided. In one embodiment, the methods comprise introducing a cement composition into a subterranean location, wherein the cement composition comprises a hydraulic cement, a particulate foamed elastomer, and an aqueous fluid; and allowing the cement composition to set in the subterranean location. In one embodiment, the particulate foamed elastomer may comprise polyurethane foam.

Abstract: A method for determining the ability of a cement composition to withstand subterranean formation conditions comprising obtaining an experimental diffraction pattern of the cement composition, generating a theoretical diffraction pattern of the cement composition, comparing the experimental diffraction pattern with the theoretical diffraction pattern, refining the theoretical diffraction pattern using a structural refinement method, determining the relative fraction of the crystalline phases present in the cement composition from the theoretical diffraction pattern, and determining the ability of the cement composition to withstand subterranean formation conditions.