摘要:
Embodiments provide a method for controlled release of a cement additive for use in a wellbore. The method includes the steps of mixing an aramide capsule with a cement slurry to form an additive-containing slurry, and introducing the additive-containing slurry into the wellbore. The aramide capsule is formed by interfacial polymerization where an aramide polymer forms a semi-permeable membrane encapsulating the cement additive.
摘要:
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.
摘要:
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.
摘要:
The invention relates to coating compositions, treated reinforced fibers, reinforced asphalt and portland cement concrete and methods for producing the same. The coating compositions include monomer, prepolymer or mixtures thereof, and graft initiator. The monomer and/or prepolymer include at least one functional group selected from the group consisting of hydroxyl, carboxyl, amino and ester. The graft initiator includes metallic salt.
摘要:
The present invention relates to a method of producing a water repelling surface or imparting hydrophobicity onto a surface comprises applying a polymer-based coating composition. The water repelling surface or the hydrophobic surface imparted by the present method has at least 90° of water contact angle. The water repelling surface or the hydrophobic surface imparted by the present method is preferably on a concrete surface. The present method imparts hydrophobicity onto surfaces that are durable without an additional primer layer between the surfaces and the coating composition.
摘要:
The invention relates to a method of stabilizing the bonding agent gelation time in the consolidation of a geological formation in the presence of one or more catalytically active substances, in which method a bonding agent is infiltrated into the formation, a portion of the infiltrated bonding agent is optionally expelled by flushing with a gas or a liquid, and the bonding agent remaining in the formation is cured. The bonding agent comprises a mixture of A) a heterocondensate, obtainable by hydrolysis and condensation of at least one hydrolyzable silicon compound and at least one metal, phosphorus or boron compound, the metal being selected from Al, Ge, Sn, Pb, Ti, Mg, Li, V, Nb, Ta, Zr and Hf, B) at least one organic polymerizable monomer or oligomer comprising a C—C double bond, and C) at least one thermal polymerization initiator without peroxide function.
摘要:
The following describes a novel and alternative mechanism in regards to releasing reactive chemicals. Namely, utilizing shells containing multiple emulsions that can be blended with the base fluids, and then react with said base fluid upon exposure to a trigger e.g. high shear and/or elongation flow, therefore plugging even large fractures. Such gelling lost circulation material allows to obtain a reliable carrier and fast reaction when triggered.
摘要:
A chemical two-component mortar compound including a resin component (A) that contains at least one radically curable, ethylenically unsaturated compound (a) as the curable component, and including a separately arranged so as to inhibit reaction curing component (B) that contains a curing agent for the resin of the resin component (A), with improved adhesion to the surface of partially cleaned and/or moist holes in mineral substrates, characterized by a content of 0.2% to 10% by weight of at least one (meth)acryloxy alkyl trialkoxy siloxane and/or poly(meth)acryloxy alkyl silsesquioxane as an additional component (b) of the resin component (A); it also describes magazines, cartridges or plastic bags containing this chemical two-component mortar compound in two or more chambers that are separate from each other, in which the resin component (A) or the curing component (B) are arranged separately so as to inhibit a reaction; and it also describes its use to chemically fasten structural elements in mineral substrates.
摘要:
Compositions and methods are directed to a cement composition for use in a subterranean formation. In an embodiment the cement composition comprises: (A) cement; (B) water; and (C) a polymer, wherein the polymer: (i) consists essentially of a monomer or monomers selected from the group consisting of acrylic acid, esters of acrylic acid, maleic acid, methacrylic acid, esters of methacrylic acid, itaconic acid, fumeric acid, citraconic acid, mesoconic acid, and any alkali metal, alkaline earth metal, or ammonium salt of any of the foregoing, and any combination of any of the foregoing.
摘要:
This invention provides an additive for Portland Cement comprising a mixture of polyols, acrylic monomers and copolymers, wetting agent, polypropylene glycol and silicone.