| Patents for C09K 8 - Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations (31,745) |
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| 10/29/1991 | US5060727 Method for improving enhanced recovery of oil using surfactant-stabilized foams |
| 10/29/1991 | CA1291420C Method of treating heterogeneous formation with potassium hydroxide |
| 10/29/1991 | CA1291419C Nitrogen stimulation of a potassium hydroxide wellbore treatment |
| 10/23/1991 | EP0453366A1 Scleroglucan drilling mud |
| 10/23/1991 | EP0452758A2 Hydrocarbon rich gels |
| 10/22/1991 | US5059333 Dissolution of sulfate scales |
| 10/22/1991 | US5058681 Increased effectiveness of fluid transport; steam contains carbon dioxide and ammonia |
| 10/22/1991 | US5058679 Solidification of water based muds |
| 10/22/1991 | US5058678 Method for preventing the formation of sludge in crude oil |
| 10/22/1991 | US5058676 Method for setting well casing using a resin coated particulate |
| 10/20/1991 | CA2040753A1 Scleroglucane containing drilling mud |
| 10/18/1991 | CA2040601A1 Gels rich in hydrocarbons |
| 10/17/1991 | DE4012105A1 Verwendung von hydriertem rizinusoel als viskositaetsbildner in oelbasierten bohrspuelsystems Use of hydrogenated castor oil as thickeners in oelbasierten bohrspuelsystems |
| 10/17/1991 | CA2040179A1 Metal ion complexes for use as scale inhibitors |
| 10/16/1991 | EP0451586A2 Well treatment fluid, inhibiting the swelling of the clay |
| 10/15/1991 | WO1991016391A1 Use of hydrated castor oil as a viscosity promoter in oil-based drilling muds |
| 10/15/1991 | US5057234 Non-hydrocarbon invert emulsions for use in well drilling operations |
| 10/15/1991 | US5057233 Hydrocarbon geller and method for making the same |
| 10/15/1991 | US5057228 Metal ion complexes for use as scale inhibitors |
| 10/15/1991 | US5056597 Injecting and mixing a surfactant; uniform distribution |
| 10/15/1991 | US5056596 Recovery of bitumen or heavy oil in situ by injection of hot water of low quality steam plus caustic and carbon dioxide |
| 10/15/1991 | CA2080484A1 Use of hydrated castor oil as a viscosity promoter in oil-based drilling muds |
| 10/10/1991 | DE4011343A1 Aq. fluid for treating borehole - contg. distn. residue from prepn. of di:amine(s) inhibiting swelling of clay |
| 10/09/1991 | EP0334944A4 Apparatus and method for removing and recovering oil and/or other oil-based drilling mud additives from drill cuttings |
| 10/08/1991 | US5055209 Reduction of the viscosity of solutions viscosified with Xanthan gum polymers |
| 10/08/1991 | US5054556 Method of and means for operating geothermal wells |
| 10/08/1991 | US5054552 Breaker system for aqueous fluids containing xanthan gums |
| 10/08/1991 | US5054551 In-situ heated annulus refining process |
| 10/03/1991 | WO1991015290A1 Branched ether surfactants and their use in an enhanced oil recovery process |
| 10/03/1991 | WO1991015289A1 Branched ether surfactants and their use in an enhanced oil recovery process |
| 10/03/1991 | CA2078111A1 Branched ether surfactants and their use in an enhanced oil recovery process |
| 10/03/1991 | CA2078110A1 Branched ether surfactants and their use in an enhanced oil recovery process |
| 10/02/1991 | EP0449360A1 Lightweight cement for high pressure applications |
| 10/02/1991 | EP0449257A2 Oil based synthetic hydrocarbon drilling fluid |
| 10/02/1991 | EP0448646A1 Use of selected diester oils as drilling fluids, in particular for exploiting off-shore petroleum or natural gas deposits (ii) |
| 10/02/1991 | EP0448579A1 Use of selected ester oils in bore-flushing fluids, particularly for the development of offshore oil and gas fields (i) |
| 10/01/1991 | US5053149 Method for dewaxing oil and gas pipelines or wells |
| 10/01/1991 | US5052490 Permeability of fines-containing earthen formations by removing liquid water |
| 10/01/1991 | US5052486 Method and apparatus for rapid and continuous hydration of polymer-based fracturing fluids |
| 10/01/1991 | CA2039211A1 Method for dewaxing oil and gas pipelines or wells |
| 09/30/1991 | CA2038303A1 Lightweight cement for high pressure applications |
| 09/25/1991 | EP0448218A1 Accelerating the set of cement compositions in wells |
| 09/25/1991 | EP0447967A2 Gelation of acrylamide-containing polymers with furfuryl alcohol and water dispersible aldehydes |
| 09/25/1991 | EP0431085A4 Method of decontaminating earth and/or natural gas processing equipment |
| 09/25/1991 | EP0418374A4 Sulfate scale dissolution |
| 09/24/1991 | US5051243 Mixing red mud in acid sulfur dioxide solution to form a residue for use as a weighting agent for drilling fluids |
| 09/24/1991 | US5051197 Aminopolycarboxylic acids and salts with organosilicone compounds for scale removal in wells |
| 09/24/1991 | CA1289692C High temperature profile modification agents and methods for using same |
| 09/18/1991 | EP0447120A1 A liquid membrane catalytic scale dissolution method |
| 09/18/1991 | EP0446865A2 Gelation of acrylamide-containing polymers with hydroxyphenyl alkanols |
| 09/18/1991 | EP0446616A1 Process for inhibiting corrosion in oil production fluids |
| 09/18/1991 | EP0446266A1 Anti-microbial agent |
| 09/18/1991 | EP0224474B1 Water soluble perforation pack |
| 09/17/1991 | US5049311 Surfactants |
| 09/17/1991 | US5049297 Sulfate scale dissolution |
| 09/17/1991 | US5049288 Set retarded cement compositions and methods for well cementing |
| 09/17/1991 | US5048609 Controlled diffusion of gel breaker |
| 09/17/1991 | US5048608 Consolidation of hydraulic fractures employing a polyurethane resin |
| 09/17/1991 | US5048607 In-situ emulsion polymerization of ethylene derivatives |
| 09/17/1991 | CA1289096C Process for the preparation of polysaccharide aqueous solutions |
| 09/13/1991 | CA2035420A1 Gelation of acrylamide containing polymers with hydroxyphenylalkanols |
| 09/11/1991 | EP0445653A1 Clay thickener for use in water-based systems and joint compounds containing such compositions |
| 09/11/1991 | EP0445185A1 Self-emulsifying ester compounds. |
| 09/10/1991 | US5046562 Fluid loss control additives for oil well cementing compositions |
| 09/10/1991 | US5046560 Oil recovery process using arkyl aryl polyalkoxyol sulfonate surfactants as mobility control agents |
| 09/10/1991 | CA1288714C Method for improving the filterability of a microbial broth and its use |
| 09/07/1991 | CA2035120A1 Clay thickener for use in water-based systems and joint compounds containing such compositions |
| 09/04/1991 | EP0444760A1 Enhanced methane production from coal seams by dewatering |
| 09/04/1991 | EP0444542A1 Cementing compositions containing polyethyleneimine phosphonate derivatives as dispersants |
| 09/04/1991 | EP0444489A1 Cementing compositions containing a copolymer as a fluid loss control additive |
| 09/03/1991 | US5045593 Adducts of Phosphatides and Anionic or Cationic Addition Polymers, Fluid Loss Control Agents, Well Drilling Fluids |
| 09/03/1991 | US5045220 Adding a polymer such as polysiloxane or polyvinyl ether and a cosolvent, enhanced oil recovery |
| 09/03/1991 | US5045219 Use of polyalphalolefin in downhole drilling |
| 09/03/1991 | US5044439 Sodium (meth)acrylate, (meth)acrylamide copolymer |
| 09/03/1991 | US5044435 Enhanced oil recovery using denitrifying microorganisms |
| 09/02/1991 | CA2037454A1 Method of enhancing methane production from coal seams by dewatering |
| 08/28/1991 | CN1054078A Process for making graft copolymers from lignin and vinyl monomers |
| 08/27/1991 | US5043468 Mixture of n-nitrosophenylhydroxylamine salt with aminocarboxylic acid |
| 08/27/1991 | US5043364 Adjusting permeability of well bores |
| 08/27/1991 | US5042598 Drilling fluid additive sweep cartridge and method |
| 08/27/1991 | US5042580 Oil recovery process for use in fractured reservoirs |
| 08/21/1991 | EP0442508A1 A process for making graft copolymers from lignin and vinyl monomers |
| 08/20/1991 | US5041630 Sulfoalkylation of naphthol with a carbonyl and a sulfur compound; reduces viscosity, retards gelation |
| 08/20/1991 | US5040604 Sand consolidation method |
| 08/14/1991 | DE4003893A1 Preventing corrosion in liquids in oil fields |
| 08/14/1991 | CN1053727A Anti-microbial agent |
| 08/13/1991 | US5039434 Reduced clay swelling; formation permeability |
| 08/13/1991 | US5039433 Polymerizing using high energy mechanical mixing and high final stage temperature |
| 08/13/1991 | US5038864 Process for restoring the permeability of a subterranean formation |
| 08/13/1991 | US5038863 Cementing oil and gas wells |
| 08/13/1991 | US5038861 Injecting aqueous solution of a polyquaternary amine |
| 08/13/1991 | CA1287622C Fluid loss additive for well drilling fluids |
| 08/08/1991 | DE4003028A1 Verwendung ausgewaehlter emulgatoren auf etherbasis fuer oelbasierte invert-emulsionen Use of selected emulsifiers ether for oelbasierte invert-emulsions |
| 08/06/1991 | US5037931 Addition polymerization of acrylamide, acrylic acid, 2-methoxy ethyl ester and lignin |
| 08/06/1991 | US5036919 Fracturing with multiple fluids to improve fracture conductivity |
| 08/06/1991 | US5036915 Controlling ph |
| 08/06/1991 | CA1287348C Surfactants from lignin |
| 08/06/1991 | CA1287315C Process for the preparation of an aqueous solution of a heteropolysaccharide |
| 08/03/1991 | WO1991011254A1 Use of selected ether-based emulsifiers in oil-based invert emulsions |
| 08/03/1991 | CA2075208A1 Use of selected ether-based emulsifiers in oil-based invert emulsions |