316 results about "Hydroxypropyl guar" patented technology

This invention relates to compositions used in treating subterranean formations, which include a hydrated polymer, and a dry blended multi-functional component. The hydrated polymer and dry blended multi-functional component are mixed at the ground surface of a wellsite, and subsequently injected into the formation providing controlled delay in crosslinking to achieve targeted fluid viscosity properties. The hydrated polymer may be a guar, hydroxypropyl guar, carboxymethyl guar, carboxymethylhydroxypropyl guar, synthetic polymers, and guar-containing compounds. The dry blended multi-functional component may include a crosslinker and a chelating agent, and the well treatment fluid may further include an activator mixed with the hydratable polymer. The chelating agent may be a polyols, gluconate, sorbitol, mannitol, carbonate, or any mixtures thereof. The crosslinker may be any source of boron, alkaline earth metal borates, alkali metal borates, zirconium compounds, titanium compounds, or any combination thereof, while the activator may be a caustic soda or magnesium oxide compound. The invention further provides methods for producing a well treatment composition including providing a hydrated polymer, and providing a dry blended multi-functional component. Also, methods of hydraulically fracturing a subterranean formation, as well as cleanup operations and gravel packing a wellbore are provided as well.

The present invention relates to artificial tear formulations and ophthalmic formulations suitable for drug delivery. The formulations comprise galactomannans such as guar or hydroxypropyl guar and a borate source such as boric acid. The formulations further comprise a cis-diol such as sorbitol that interferes with the cross-linking of galactomannan and borate. Optionally, the formulations are substantially free of divalent cations.

The invention provides a composition comprising a benefit agent delivery particle comprising at least one of hydroxylpropyl methyl cellulose, hydroxylethyl methyl cellulose, hydroxylpropyl guar, hydroxylethyl ethyl cellulose or methyl cellulose. The benefit agent delivery particle may further comprise a non-polysaccharide polymer, preferably an aminoplast polymer. The benefit agent delivery particle may comprise a perfume. The invention also provides a process for the manufacture of the particles in which perfume oil is encapsulated using emulsion polymerization to form core-shell particles, (in the alternative the perfume may be adsorbed later) and, a further polymer layer is formed on the outer surface of the core shell-particles in the presence of the delivery aid.

This invention relates to compositions used in treating subterranean formations, which include a hydrated polymer, and a dry blended multi-functional component. The hydrated polymer and dry blended multi-functional component are mixed at the ground surface of a wellsite, and subsequently injected into the formation providing controlled delay in crosslinking to achieve targeted fluid viscosity properties. The hydrated polymer may be a guar, hydroxypropyl guar, carboxymethyl guar, carboxymethylhydroxypropyl guar, synthetic polymers, and guar-containing compounds. The dry blended multi-functional component may include a crosslinker and a chelating agent, and the well treatment fluid may further include an activator mixed with the hydratable polymer. The chelating agent may be a polyols, gluconate, sorbitol, mannitol, carbonate, or any mixtures thereof. The crosslinker may be any source of boron, alkaline earth metal borates, alkali metal borates, zirconium compounds, titanium compounds, or any combination thereof, while the activator may be a caustic soda or magnesium oxide compound. The invention further provides methods for producing a well treatment composition including providing a hydrated polymer, and providing a dry blended multi-functional component. Also, methods of hydraulically fracturing a subterranean formation, as well as cleanup operations and gravel packing a wellbore are provided as well.

The invention relates to an anion healthy paint which comprises the following combination raw materials in parts by weight: 300 parts of purified water, 1.5 parts of hydroxypropyl guar gum, 2 parts ofhydroxyethylcellulose, 1 part of waterborne pigment wetting agent, 4 parts of water soluble dispersant, 3 parts of defoamer, 200 parts of titanium dioxide, 72 parts of anion coating additive, 50 parts of micro calcined kaolin, 10 parts of aluminosilicate, 10 parts of wollastonite, 10 parts of barite, 8 parts of propanediol, 1 part of sodium hydroxide diluent, 2 parts of bactericide, 50 parts of talcum powder, 60 parts of fine heavy calcium carbonate, 13 parts of mildewproof powder, 200 parts of styrene-acrylic emulsion and 2.5 parts of thickener. A preparation method comprises the following steps: putting the purified water into a dispersion reactor; respectively adding the hydroxypropyl guar gum and cellulose into the dispersion reactor; then adding the diluent, the wetting agent, the dispersant, the bactericide, the defoamer, the aluminosilicate, the talcum powder, the kaolin, the titanium dioxide, the heavy calcium, the wollastonite, the barite and the mildewproof powder; sand grinding the mixture; adding the defoamer, the propanediol, the styrene-acrylic emulsion, the anion additive, the thickener and the purified water into a paint mixing reactor; and finally adding sodium hydroxide and filtering and packing to obtain the anion healthy paint.

The invention relates to high-density low-friction fracturing fluid. The high-density low-friction fracturing fluid is made of, by weight, 20-46.5% of weighting agent sodium nitrate, 0.4-0.6% of thickener hydroxypropyl guar gum, 0.4-1.0% of cleanup additive Gemini surfactant, 0.1-0.3% of pH (potential of hydrogen) modifier, 0.1-0.3% of bactericide lauryltrimethylammonium chloride or dodecyl dimethyl benzyl ammonium bromide, 0.5-1.0% of clay stabilizer quaternary ammonium salt, 0.5-1.0% of temperature stabilizer organic amine composite, and the balance water. Sodium nitrate is used for increasing weight, the density at the normal temperature can reach 1.35g / cm<3>, and the high-density low-friction fracturing fluid is long in delayed crosslinking time, low in friction, low in filter loss, high in high-temperature rheological property, and especially applicable to fracture modification of ultradeep compact reservoirs under unusual high pressure, wellhead construction pressure can be reduced remarkably. Further, the high-density low-friction fracturing fluid is applicable to massive popularization and application to mine fields, low in cost and low in stratum damage, and has wide market prospect.

Alcohol based hydraulic fracturing fluids useful for treating oil and gas wells are disclosed. The fluids are compatible with carbon dioxide, and comprise an alcohol, a polymer, a crosslinking agent, and a breaker. Hydroxypropyl guar with a molar substitution of about 1.2 to about 2.2 is identified as a presently preferred polymer.

The invention relates to an ultralow-concentration fracturing fluid and a preparation method thereof. Currently, a reservoir is reconstructed by adopting a hydraulic fracturing method with the following shortcomings: (1) the rubber crushing residue content in the fracturing fluid is high and is generally 500-600 mg / L; and (2) the using amount of the rubber crushing agent is larger during reconstructing the reservoir and the average using amount is up to about 0.03%. The ultralow-concentration fracturing fluid provided by the invention comprises 93.35-97.4 parts of water, 0.25-0.35 part of hydroxypropyl guar, 1.0-2.0 parts of cross-linking agent, 0.40-2.0 parts of surfactant, 0.20-1.0 part of clay stabilizer, 0.05-0.5 part of bacteriacide and 0.2-0.8 part of temperature resistant reinforcing agent; and the preparation method comprises the following steps of: preparing a solution A in a container; and mixing the solution A and the cross-linking agent according to a volume ratio of 100:1-100:2 so as to form the fracturing fluid. In the fracturing fluid provided by the invention, the concentration of the hydroxypropyl guar as a thickening agent is up to 0.25-0.35%.