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| Number | Title | Issue Date |
| 5208284 | Coating composition Coatings compositions, which are useful as buffer layers between ceramic layers derived from polysilazane-containing compositions and ceramic layers derived from organoborosilazane polymer-containing compositions, are obtained by dissolving (A) a Group II... | 05/04/1993 |
| 5190675 | Gelling organic liquids A method of producing a gel of an organic liquid, using a metal phosphate ester in which all of the reagents are substantially free of water and pH-affecting substances. The gel is particularly useful in fracturing subterranean formations by entraining a ... | 03/02/1993 |
| 5160643 | Method for delaying the gellation of borated galactomannans with a delay additive such as glyoxal A complexor and method of use are shown for providing controlled delay of the cross-linking reaction in an aqueous well fracturing fluid. A base fluid is first prepared by blending together an aqueous fluid and a hydratable polymer which is capable of gel... | 11/03/1992 |
| 5160642 | Polyimide quaternary salts as clay stabilization agents A clayish formation, such as encountered in rock surrounding an oil well bore, is stabilized with a quaternary ammonium salt of an imide of polymaleic anhydride. The invention is particularly relevant to hydraulic fracturing fluids used for enhanced oil r... | 11/03/1992 |
| 5154857 | Demulsifying and antifouling agent suitable for separating possibly emulsified water/hydrocarbon mixtures The invention relates to a water-soluble demulsifying and antifouling agent capable of separating possibly emulsified water/hydrocarbon mixtures, and particularly water/crude petroleum mixtures containing suspended matter. Said agent comprises from 10 to 60 pe... | 10/13/1992 |
| 5152906 | Clay stabilizing composition for oil and gas well treatment A clay swelling inhibitor additive for oil and gas well treatment is disclosed. The additive comprises an aqueous solution of tetraalkylammonium chloride, preferably tetramethylammonium chloride and a quaternary amine-based cationic polyelectrolyte, such ... | 10/06/1992 |
| 5149690 | Drilling fluid additive and method for inhibiting hydration This invention relates to drilling fluid additives that suppress clay swelling within a subterranean well and to methods for controlling clay swelling during the drilling of a subterranean well. Aliphatic polyamines and aliphatic acids react to form polya... | 09/22/1992 |
| 5145590 | Method for improving the high temperature gel stability of borated galactomannans A complexor solution and method of use are shown for providing controlled delay and improved high temperature gel stability of borated fracturing fluids. A base fluid is first prepared by blending together an aqueous fluid and a hydratable polymer which i... | 09/08/1992 |
| 5143661 | Silicone-hardened pharmaceutical microcapsules There is disclosed a process for preparing compositions comprising microcapsules by phase separation microencapsulation wherein the hardening agent employed is a volatile silicone fluid and with the compositions prepared thereby. The use of the volatile s... | 09/01/1992 |
| 5143645 | Method for suppressing process dust emissions using a salt of a fatty acid as a foaming agent Foam is formed from a solution of demineralized make-down water and foaming agent, and the foam contacted with solid materials to suppress process dust emissions. The foaming agent may be a low salt tolerant surfactant which loses its surface active prope... | 09/01/1992 |
| 5135909 | Drilling mud comprising tetrapolymer consisting of N-vinyl-2-pyrrolidone, acrylamidopropanesulfonic acid, acrylamide, and acrylic acid A water-based drilling fluid comprising a water soluble tetrapolymer in combination with clayey materials.... | 08/04/1992 |
| 5132284 | Polyamphoteric polysaccharide graft copolymers neutrally charged A method of thickening, stabilizing, controlling mobility, or enhancing water retention in aqueous media and electrolyte-containing aqueous media employs neutrally-charged polyamphoteric graft copolymers of polysaccharides with zwitterionic monomers or ca... | 07/21/1992 |
| 5132285 | Method for thickening or stabilizing aqueous media with polyamphoteric polysaccharides A method of thickening, stabilizing, controlling mobility, or enhancing water retention in aqueous media and electrolyte-containing aqueous media employs neutrally-charged polyamphoteric graft copolymers of polysaccharides with zwitterionic monomers or ca... | 07/21/1992 |
| 5120455 | Hydraulic fracturing propping agent A high strength propping agent for use in hydraulic fracturing of subterranean formations comprising solid, spherical particles having an alumina content of between 40 and 60%, a density of less than 3.0 gm/cc and an ambient temperature permeability of 10... | 06/09/1992 |
| 5120470 | Solvent composition comprising a chloropentafluoropropane and a chlorofluoroethane The present invention provides: (1) a solvent composition comprising chloropentafluoropropane and 1,1-dichloro-1-fluoroethane; and (2) a solvent composition comprising chloropentafluoropropane and dichlorotrifluoroethane.... | 06/09/1992 |
| 5110485 | Liquid aluminum phosphate salt gelling agent A liquid aluminum phosphate salt gelling agent comprising the reaction product of: a dialkyl phosphate formed from the reaction product of (1) a polyphosphate intermediate produced by reacting triethyl phosphate and phosphorous pentoxide and (2) a mixture... | 05/05/1992 |
| 5106516 | Monocarboxylic acid methylesters in invert drilling muds The invention relates to the use of methylesters of C6-24 monocarboxylic acids as the oil phase or as part of the oil phase of invert drilling muds which are suitable for the environment-friendly development of oil and gas sources and which, in... | 04/21/1992 |
| 5104557 | Mercaptan composition for dissolving sulfur and process for its use A composition is disclosed for dissolving sulfur and preventing or removing sulfur plugs from sour gas and oil wells or other conduits through which sulfur bearing liquids flow which comprises a major proportion of a liquid or gaseous mercaptan, a minor p... | 04/14/1992 |
| 5101902 | Aqueous spacer composition compatible with drilling muds and cement slurries An aqueous spacer composition, compatible with drilling muds and cement slurries including saline slurries, and application there of drilling oil and gas wells. Preferred spacer bases in accordance with the invention comprise a biopolymer of the type prod... | 04/07/1992 |
| 5102561 | Processes of thickening and of oil recovery using polysaccharide polymer made by xanthomonas A polysaccharide polymer is disclosed which is a better viscosifier of water than xanthan gum. The polysaccharide polymer and its non-acetylated form, are comprised of glucose and mannose moieties in a ratio of about 2:1. The invention also discloses Xant... | 04/07/1992 |
| 5096883 | Oil-base drilling fluid comprising branched chain paraffins such as the dimer of 1-decene A non-toxic drilling fluid (drilling mud), for use in rotary-type well-drilling operations, comprises a non-toxic base-oil consisting essentially of branched-chain paraffins which may or may not contain ester functionalities, the base-oil having: (i) betw... | 03/17/1992 |
| 5094830 | Process for removal of water and silicon mu-oxides from chlorosilanes A scavenger composition having utility for removal of water and silicon mu-oxide impurities from chlorosilanes, such scavenger composition comprising: (a) a support; and (b) associated with the support, one or more compound(s) selected from the group cons... | 03/10/1992 |
| 5089151 | Fluid additive and method for treatment of subterranean formations A treatment fluid additive and method for treatment of subterranean formations to minimize formation permeability damage as a result of formation contact by the treatment fluid, wherein the fluid treatment additive is a formation control additive of the g... | 02/18/1992 |
| 5089165 | Compositions of water-dispersed diprimary amine terminated polymers Novel water-dispersed compositions are prepared containing (1) 100 parts by weight of an amine-containing polymer, (2) at least 25 parts by weight of a solvent which is soluble in both water and organics and has a boiling point above about 100° C., (3) a... | 02/18/1992 |
| 5087611 | Method of drilling with fluid comprising peanut hulls ground to a powder A by-product of peanut growing is utilized in the drilling fluid while drilling boreholes to reduce friction and to reduce the normal adverse effects inherent in such drilling fluid.... | 02/11/1992 |
| 5082576 | Removal of sulfides using chlorite and an amphoteric ammonium betaine This invention relates to a composition suitable for use in process for the removal of sulfides, especially hydrogen sulfide from a feed contaminated therewith. The composition comprises an aqueous solution of a chlorite and a corrosion inhibitor which is... | 01/21/1992 |
| 5082579 | Method and composition for delaying the gellation of borated galactomannans A complexor and method of use are shown for providing controlled delay of the cross-linking reaction in an aqueous well fracturing fluid. A base fluid is first prepared by blending together an aqueous fluid and a hydratable polymer which is capable of gel... | 01/21/1992 |
| 5077316 | Metal phenoxide/polyethylene glycols chemical decontaminant system A barrier cream consisting essentially of at least one active ingredient chosen from the alkali metal salts of phenols, dispersed in a substantially anhydrous state in a base medium comprising a polyethylene glycol which has been at least partially etheri... | 12/31/1991 |
| 5075297 | Broad spectrum chemical decontaminant system A protective system against chemical warfare agents consisting essentially of at least one alkali metal salt of phenol, acetone oxime, acetophenone oxime and 2,3-butanedione monoxime, a macrocycle chosen from 18-crown-6 or cryptand [2,2,2] and a solvent c... | 12/24/1991 |
| 5069802 | Gas flood surfactants enriched in olefin disulfonate Improved gas foam flooding surfactants and gas foam-forming mixtures wherein the surfactants are enriched in olefin disulfonate. The surfactants may be used in either a gas drive or a gas soak process. Use of the disulfonate-enriched gas foam surfactants ... | 12/03/1991 |
| 5057233 | Hydrocarbon geller and method for making the same An improved hydrocarbon gelling agent is disclosed comprising the reaction product of (1) a polyphosphate intermediate produced by reacting triethyl phosphate and phosphorous pentoxide and (2) a mixed alcohol having a substantial hexanol component, togeth... | 10/15/1991 |
| 5049309 | Titania sol Disclosed is a process for producing a titania sol which comprises an aqueous dispersion of finely-divided titania dispersed therein and has a neutral pH range. The process comprises peptizing hydrous titanium oxides with a monobasic acid or salt thereof ... | 09/17/1991 |
| 5045220 | Increasing the viscosity of CO2 solutions A method of increasing the viscosity of CO2 at least three-fold by adding (1) a viscosifying amount of a polymer having a Minimum Solubility Parameter of 6.85 or less and a plurality of electron donor atoms selected from the group consisting of... | 09/03/1991 |
| 5045219 | Use of polyalphalolefin in downhole drilling The composition of matter and application thereof in the present invention relates to the application of a synthetic hydrocarbon compound, a polyalphaolefin liquid, blended in various concentrations with chemical oil and water emulsifiers, thinners and oi... | 09/03/1991 |
| 5039432 | Copolymers of (meth) acrylic acid esters as flow improvers in oils Method of reducing the pour-point and improving the flowability of petroleum oil or a fraction thereof by adding thereto a flowability-improving quantity of at least one copolymer of (a) an acrylic acid ester, a methacrylic acid ester, or a mixture of an ... | 08/13/1991 |
| 5039434 | Acidizing composition comprising organosilicon compound Subterranean formations are treated with acid, by a method comprising the steps of: (1) forming an acidizing composition by mixing an aqueous acid component with at least one water-soluble organosilicon compound; and (2) injecting the composition into the... | 08/13/1991 |
| 5035812 | Thermostable polymers The present invention provides a thermostable polymer comprising a) 16 to 67 mole % of structural components of the formula: ##STR1## b) 5 to 42 mole % of structural components of the formula: ##STR2## wherein R1, R2 and R... | 07/30/1991 |
| 5034139 | Polymer composition comprising phosphorous-containing gelling agent and process thereof Water absorbent polymers provided, in the form of a thixotropic hydrocarbon gel, demonstrate controlled water absorption. This property enables improved usage of such polymers in the reduction of the loss of circulation fluid or as a viscous sweep in the ... | 07/23/1991 |
| 5032295 | Polymers for use in drilling muds A polymer for use as a deflocculant in drilling muds comprising at least one unsaturated carboxylic acid or its anhydride or salt, at least one unsaturated sulfonic acid or its salt, at least one unsaturated cationic-containing monomer, and optionally, on... | 07/16/1991 |
| 5030366 | Spacer fluids Spacer fluids providing an effective buffer between drilling fluids and cement slurries during well completion. The spacer fluids comprise a sulfonated styrene copolymer dispersant and one or more additional components such as surfactants, viscosifiers an... | 07/09/1991 |
