This invention relates to water-soluble or water-swellable polymers, containing a) 25-35 mol. % of one or more recurrent structural units of formula (1), where R.sup.1 and R.sup.2 represent hydrogen, methyl or ethyl, A represents a linear or branched C.sub.1-C.sub.12-alkylene, and Q.sup.+ stands for H.sup.+, NH.sub.4.sup.+, Li.sup.+, Na.sup.+, K.sup.+, Ca.sup.++, Mg.sup.++, Zn.sup.++, Al.sup.+++, or organic ammonium ions of the formula [HNR.sup.5R.sup.6R.sup.7].sup.+, b) 3 to 8 mol. % of one or more recurrent structural units of formula (2), where R.sup.1 represents hydrogen, methyl, or ethyl, X.sup.+ stands for H.sup.+, NH.sub.4.sup.+, Li.sup.+, Na.sup.+, K.sup.+, Ca.sup.++, Mg.sup.++, Zn.sup.++, Al.sup.+++, or organic ammonium ions of the formula [HNR.sup.5R.sup.6R.sup.7].sup.+, B is a linear or branched alkylene group with 1 to 6 carbon atoms, and n is a whole number between 0 and 5, and c) 57 to 72 mol. % of a (meth)acrylamide.

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Embodiments herein include a method comprising providing a self-sealing cement slurry comprising an aqueous base fluid, a cementitious material, and a vulcanized oil and water swellable particulate composite, wherein the vulcanized oil and water swellable particulate composite comprises an elastomer, a crosslinked water swellable superabsorbent polymer, and a hydrophobically modified water-soluble polymer; introducing the self-sealing cement slurry into a subterranean formation; and allowing the self-sealing cement slurry to set, wherein the vulcanized oil and water swellable particulate composite is capable of swelling in the presence of a non-aqueous fluid and an aqueous fluid to reduce the permeability of fluid flowpaths in the set self-sealing cement slurry upon loss of structural integrity.

A composition includes a polymer-grafted lignin formed by grafting one or more hydrophilic polyalkylene oxide polymers with lignin, wherein the average grafting density of the polymer-grafted lignin is less than 10 per lignin particle and the weight fraction of the one or more hydrophilic polyalkylene oxide polymers in the polymer grafted lignin is less than 40%.

A composition includes a polymer-grafted lignin formed by grafting one or more hydrophilic polyalkylene oxide polymers with lignin, wherein the average grafting density of the polymer-grafted lignin is less than 10 per lignin particle and the weight fraction of the one or more hydrophilic polyalkylene oxide polymers in the polymer grafted lignin is less than 40%.

A powdery additive comprising a water-soluble porous powder impregnated with a specific polyethylene glycol derivative is provided. The powdery additive is easy to handle and effective for formulating a hydraulic composition which is improved in fluidity, bleeding reduction and frost damage resistance.

A powdery additive comprising a water-soluble porous powder impregnated with a specific polyethylene glycol derivative is provided. The powdery additive is easy to handle and effective for formulating a hydraulic composition which is improved in fluidity, bleeding reduction and frost damage resistance.

A packaged composition may include a package made from a water-soluble polymer material. The package may be configured to contain a cementitious composition. The cementitious composition may include water in the form of microencapsulated water spheres and high alumina cement.

The present invention describes a hardening accelerating admixture for hydraulic binders, the accelerator being based on transition metal silicate hydrates having the general formula: aMe.sub.xO.sub.y bMO cAl.sub.2O.sub.3 SiO.sub.2 dH.sub.2O 1) whereMe represents a transition metal whose molar coefficient a is in a range between 0.001 and 2, preferably between 0.01 and 1; M represents an alkaline earth metal whose molar coefficient b is in a range between 0 and 2, preferably between 0.3 and 1.6; The molar coefficient c for Al.sub.2O.sub.3 is in a range between 0 and 2, preferably between 0.1 and 1; H.sub.2O represents the hydration water of the silicate hydrate whose molar coefficient d can vary within a wide range between 0.5 and 20; x and y can both be equal to 1 or different, depending on the valence of the transition metal, given that the valence of the oxygen atom in the metal oxide is equal to 2.

The presently disclosed and/or claimed inventive process concept(s) relates generally to a water soluble or water dispersible composition comprising a copolymer and use in oil field. More particularly, the presently disclosed and/or claimed inventive concept(s) relates to the copolymers comprising allyloxy linkage and its function derivatives and its use in oil field such as a high temperature cement retarder composition.

A rapidly-expanding and -curing geopolymer formulation includes a liquid aqueous phase with silicate, aluminate and/or silico-aluminate precursors, an inorganic base, a monosaccharide and/or disaccharide, and a water-soluble peroxy compound. The saccharide and peroxy compound react spontaneously and rapidly in strongly alkaline conditions, producing an expanding gas and exothermic heat of reaction that drives at least an initial cure of the geopolymer formulation. The resulting foamed geopolymer formulation can be used in a variety of building and construction applications, as well as and others.