| 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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| 08/03/1991 | CA2035356A1 Method of treating subterranean formulations using a non damaging fracturing fluid |
| 07/30/1991 | US5036136 Mixtures of colloidal rod-like viscoelastic fluids and anionic-alkyl containing copolymers |
| 07/30/1991 | US5035813 Containing water, lime, glycerol,sugar and silica flour as weighing agent;drilling of geothermal brine wells |
| 07/30/1991 | US5035812 Vinyl and acrylic copolymers, fluid loss additives for drilling muds, retention agents for cements, mortars |
| 07/30/1991 | US5035288 Subterranean Hydrocarbon Recovery |
| 07/30/1991 | US5035287 Use Of Metal-Containing Oxidizing Solutions In Subterranean Reservoirs |
| 07/30/1991 | CA1286981C High salinity polymer drive for surfactant flooding systems |
| 07/24/1991 | EP0408700A4 Composition and method for sweetening hydrocarbons |
| 07/23/1991 | US5034140 Well acidizing compositions and method |
| 07/23/1991 | US5034139 Water absorption polymer gel as drilling fluid thickeners |
| 07/23/1991 | US5034062 Use of acid-containing anionic emulsion copolymers as calcined clay slurry stabilizers |
| 07/23/1991 | US5033548 Process to improve hydrocarbon recovery by decreasing injection solution viscosity and improving solution screen factor |
| 07/23/1991 | US5033547 Enchaned oil recovery |
| 07/17/1991 | EP0436731A1 Film for wafer processing |
| 07/17/1991 | CA2030330A1 Method of using urea as a sacrificial agent for surfactants in enhanced oil recovery |
| 07/16/1991 | US5032298 Antideposit |
| 07/16/1991 | US5032297 Enzymatically degradable fluid loss additive |
| 07/16/1991 | US5032296 Well treating fluids and additives therefor |
| 07/16/1991 | US5032295 Nonflocculating |
| 07/16/1991 | US5032280 Liquid membrane catalytic scale dissolution method |
| 07/16/1991 | US5031700 Enhanced oil recovery |
| 07/16/1991 | US5031698 Steam foam surfactants enriched in alpha olefin disulfonates for enhanced oil recovery |
| 07/16/1991 | CA1286437C Method for preparing dilute polymer solutions |
| 07/16/1991 | CA1286287C Hydrophobically modified non-ionic polygalactomannan ethers |
| 07/16/1991 | CA1286099C Method of fracturing using hydration process involving sequential steps |
| 07/11/1991 | WO1991009815A1 Ceramic microspheres |
| 07/10/1991 | CN1013133B Delayed in situ crosslinking of acrylamide polymers for oil recovery applications in high-temp. formations |
| 07/09/1991 | US5030603 Lightweight oil and gas well proppants |
| 07/09/1991 | US5030366 Spacer fluids |
| 07/09/1991 | US5030365 Of high and low softening points, causticized lignite and a strongly lipophilic surfactant |
| 07/09/1991 | CA1285767C Method of disinfecting petroleum and petroleum products |
| 07/09/1991 | CA1285749C Powder - form lubricant additive for water-based drilling fluids |
| 07/09/1991 | CA1285747C Carbonate-containing co _foam for enhanced oil recovery |
| 07/09/1991 | CA1285746C Organophilic polyphenolic acid adducts |
| 07/08/1991 | CA2019057A1 Method of stabilizing polymer solutions in a subterranean formation |
| 07/03/1991 | CN1052687A Functional fluids |
| 07/03/1991 | CA2028168A1 Sand consolidation method |
| 07/02/1991 | USH935 Compositions for oil-base drilling fluids |
| 07/02/1991 | US5028344 Nitrogen Heterocycle or Butanediamine, Syneresis Reduction |
| 07/02/1991 | US5028343 Inhibit Loss Of Catalytic Activity In Storage For An Amine-Mercaptan Mixture |
| 07/02/1991 | US5028342 Drilling mud additives based on a polymer mixture, their use, and a process for their production |
| 07/02/1991 | US5028341 Well servicing fluid |
| 07/02/1991 | US5028271 Vinyl grafted lignite fluid loss additives |
| 07/02/1991 | US5027901 Method of oil well corrosion inhibition via emulsions and emulsions therefore |
| 07/02/1991 | US5027898 Foaming agents for carbon dioxide and steam floods |
| 07/02/1991 | US5027897 Supplying solvent and hydrophilizing solution into well |
| 07/02/1991 | CA1285379C Salt-tolerant alkyl aryl sulfonate compositions for use in enhanced oilrecovery processes |
| 06/30/1991 | CA2030745A1 Method to reduce movement of a cpf device via a gelled petroleum based fluid |
| 06/30/1991 | CA2030744A1 Method to reduce movement of a cpf device via a shear-thickening fluid |
| 06/30/1991 | CA2030743A1 Method to reduce movement of a cpf device via a drag-reducing fluid tamp |
| 06/26/1991 | EP0434544A1 Process and composition for the selective reduction of the water permeability in warm and salt hydrocarbon reservoirs |
| 06/26/1991 | EP0434461A1 Ceramic microspheres |
| 06/26/1991 | EP0292508B1 Corrosion inhibiting composition for zinc halide-based clear, high density fluids |
| 06/25/1991 | US5026490 Zwitterionic functionalized polymers as deflocculants in water based drilling fluids |
| 06/25/1991 | US5026483 Methods for treating hydrocarbon recovery operations and industrial waters |
| 06/25/1991 | US5026481 Liquid membrane catalytic scale dissolution method |
| 06/25/1991 | CA1285135C Plugging a tubing/casing annulus in a wellbore with a polymer gel |
| 06/25/1991 | CA1285134C Wellbore cementing process using a polymer gel |
| 06/25/1991 | CA1285133C Plugging an abandoned well with a polymer gel |
| 06/23/1991 | CA2033131A1 Ceramic microspheres |
| 06/22/1991 | WO1991010042A1 Process for enriching a gas |
| 06/22/1991 | CA2069434A1 Process for enriching a gas |
| 06/19/1991 | EP0432646A2 Alkoxylated alkyl glucoside ether quaternaries useful in personal care |
| 06/18/1991 | US5025040 Of water, hydraulic cement and a blend of acrylamide-vinylimidzole copolymer and acrylamide-vinylimidazole-acrylamidomethyl propane sulfonic acid sodium salt terpolymer |
| 06/18/1991 | US5024276 Hydraulic fracturing in subterranean formations |
| 06/18/1991 | US5024271 Permanent-magnet wax-proof device |
| 06/14/1991 | WO1991009206A1 Method of supporting fractures in geological formations and hydraulic fluid composition for same |
| 06/13/1991 | WO1991008271A1 Improved process for stabilising rock and/or filling hollows, e.g. in tunnel building and mining |
| 06/12/1991 | EP0431085A1 Method of decontaminating earth. |
| 06/11/1991 | US5022467 Polymer containing pendant silyl ether groups useful in enhanced oil recovery using CO2 flooding |
| 06/11/1991 | US5022466 Method for steam flooding profile control |
| 06/08/1991 | CA2004948A1 Process and apparatus for cleaning high pressure water injection wells |
| 06/06/1991 | DE3940088A1 Verbessertes verfahren zur gesteinsverfestigung und/oder hohlraumverfuellung zb im tunnel- und bergbau Improved methods for rock solidification and / or hohlraumverfuellung eg tunnels and mining |
| 06/06/1991 | DE3939513A1 Treating drilling mud used as ballast and non-constructional concrete - by adding cement and allowing the resulting concrete mixt. to set |
| 06/05/1991 | EP0430644A1 Spacer fluids |
| 06/05/1991 | EP0430602A1 Functional fluids |
| 06/04/1991 | US5021526 Anionic polymeric stabilizers for oil-in-water emulsions |
| 06/04/1991 | US5021498 Asphaltene dispersants - inhibitors |
| 06/04/1991 | US5021170 Mixture of sulfonated ethylene-propylene-5-phenyl-2-norbornene terpolymer and organophilic clay |
| 06/04/1991 | US5021094 Swellable clays, thinner with salt of polycarboxylic acid, water; for sealing bore holes or subterranean cavities. |
| 06/04/1991 | US5020595 Carbon dioxide-steam co-injection tertiary oil recovery process |
| 06/04/1991 | CA1284693C Method for concentrating surfactant from a brine solution |
| 06/01/1991 | CA2004393A1 Method of cementing well casing to avoid gas channelling from shallow gas-bearing formations |
| 05/28/1991 | US5019341 Contacting with polymerization product of tallowtriamine or tallowtetramine and (meth)acrylate |
| 05/28/1991 | US5019279 Process for enriching a gas |
| 05/28/1991 | US5019274 Methods for treating hydrocarbon recovery operations and industrial waters |
| 05/28/1991 | US5018577 Phosphinate inhibitor for scale squeeze applications |
| 05/22/1991 | EP0427835A1 Non-damaging workover and completion fluid. |
| 05/22/1991 | CN1051580A Wellbore fluid |
| 05/21/1991 | US5016714 Biocidal well treatment method |
| 05/21/1991 | US5016711 Cement sealing |
| 05/16/1991 | WO1991006511A1 Polyvinyl sulfonate scale inhibitor |
| 05/15/1991 | EP0427107A2 Drilling fluid additive |
| 05/14/1991 | US5015409 For cleansers, corrosive products household products or personal care products |
| 05/14/1991 | US5015400 Polyvinyl alcohol, xanthan biopolymer, sodium alginates, acrylamide copolymer with acrylamido-2-methyl propanesulfonate or w ith vinyl alcohol as crosslinking agents |
| 05/14/1991 | US5014783 And displating oil from matrix block; enhanced oil recovery |
| 05/14/1991 | CA2027504A1 Compositions for oil-base drilling fluids |
| 05/10/1991 | WO1991007570A1 Improved method for transporting particles in a porous medium |
| 05/08/1991 | EP0426427A2 Well completion method |
| 05/08/1991 | EP0426255A2 Organophilic clay and process for preparing it |