| 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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| 04/17/1990 | US4916946 Method of flowing a high viscosity substance through a conduit at a low apparent viscosity |
| 04/17/1990 | CA1267777A1 Non-polluting fluidising agents for drilling fluids having soft or salt water base |
| 04/17/1990 | CA1267776A1 Alkaline silicate compounds, and their uses |
| 04/11/1990 | EP0363316A1 Biocides to protect materials and for water systems |
| 04/10/1990 | US4915845 Inhibition method |
| 04/10/1990 | US4915174 Storage-stable thickeners for enhanced oil recovery |
| 04/10/1990 | US4915170 Enhanced oil recovery method using crosslinked polymeric gels for profile control |
| 04/10/1990 | US4915169 Method for controlling the pH of steam fluids using heterocyclic, multifunctional, nitrogen-containing compounds |
| 04/10/1990 | CA1267747A1 Gel and process for preventing carbon dioxide break through |
| 04/04/1990 | EP0362121A2 Bore rinsing additive based on a polymer mixture, its use and process for producing the same |
| 04/04/1990 | CN1007425B Hydrauliccement |
| 04/03/1990 | US4913237 Remedial treatment for coal degas wells |
| 04/03/1990 | US4913236 Corrosion resistance by forming alkaline component in vapor phase |
| 04/03/1990 | US4913235 Enhanced oil recovery using CO2 flooding |
| 04/03/1990 | CA1267276A1 Acidizing method |
| 03/28/1990 | EP0181915B1 Surfactant compositions for steamfloods |
| 03/27/1990 | US4911923 Water insoluble polyoxymethylene glycol |
| 03/27/1990 | US4911241 Constant viscosity foam |
| 03/27/1990 | US4911238 Gas flooding with surfactants enriched in olefin disulfonate |
| 03/27/1990 | CA1267079A1 Method for removal of flow restricting matter from hydrocarbon producing wells |
| 03/27/1990 | CA1267075A1 Encapsulated water absorbent polymers as lost circulation additives for aqueous drilling fluids |
| 03/21/1990 | EP0359349A2 Thermoreversible thickener |
| 03/21/1990 | EP0359048A2 Amidoamine salts of alkenylsuccinic acid derivatives, method for their preparation and their use as corrosion inhibitors |
| 03/21/1990 | CN1040651A Miscible gas enhanced oil recovery method using ethoxylated alkyphenol sulfonate-sulfate |
| 03/20/1990 | US4910248 Polymer containing a quaternary amine group |
| 03/20/1990 | US4909324 Block copolymers useful for enhanced oil recovery processes |
| 03/14/1990 | EP0358385A2 Polymeric thickeners |
| 03/14/1990 | EP0357924A1 Process for removing hydrogen sulfide with special iron oxides |
| 03/13/1990 | US4908141 Quaternary ammonium sulfonic acid compounds |
| 03/13/1990 | US4907656 Method for preventing steam channelling into a non-aquifer bottom water zone |
| 03/13/1990 | CA1266559A1 Low toxicity oil composition and use thereof in drilling fluids |
| 03/13/1990 | CA1266558A1 Peroxygen breaker systems for well completion fluids |
| 03/13/1990 | CA1266557A1 Hydraulic cement slurry |
| 03/06/1990 | USH751 Method of inhibiting acid corrosion of ferrous metals |
| 03/06/1990 | US4906575 Phosphate compound that is used in a microbial profile modification process |
| 03/06/1990 | US4905762 Inhibiting wax deposition from a wax-containing oil |
| 03/06/1990 | US4905761 Microbial enhanced oil recovery and compositions therefor |
| 03/06/1990 | CA1266433A1 Antimicrobial compositions and method |
| 02/28/1990 | EP0356001A2 Dissolution of paraffinic/bituminous deposits and pour point reduction |
| 02/28/1990 | EP0355505A1 Low density proppants and methods for making and using same |
| 02/27/1990 | US4903773 Method for injecting water in fluid-storing rocks containing clay materials |
| 02/27/1990 | US4903771 Method for establishing effective barriers to production of undesired fluids in the recovery of oil |
| 02/27/1990 | US4903770 Adding polymerizable monomer, diluent, acid catalyst; injecting with steam |
| 02/27/1990 | US4903769 Method of controlling permeability damage of hydrocarbon formations during steam injection using bicarbonate ions and sources of ammonia |
| 02/27/1990 | US4903768 Steam injection till breakthrough activating gellable mixture to solid gel in situ, sealing high permeability zone |
| 02/27/1990 | US4903767 Crosslinking xanthane polymer with alkylated melamine resin, sealing breakthrough zone; stabilization, enhanced oil recovery |
| 02/27/1990 | US4903766 Selective gel system for permeability profile control |
| 02/22/1990 | DE3926970A1 Bohrspuelung und verfahren zum bohren eines bohrloches Drilling fluid and process for drilling a borehole |
| 02/20/1990 | US4902830 Polyaralkylated hydroxybenzamides, process for their preparation and their use |
| 02/20/1990 | US4901797 Method for plugging subterranean formations with siliceous gels |
| 02/20/1990 | US4901795 Method for imparting selectivity to otherwise nonselective polymer control gels |
| 02/20/1990 | CA1265992A1 Method for drawing up special crude oil |
| 02/14/1990 | EP0354336A1 Microbial control of hydrogen sulfide production by sulfate reducing bacteria |
| 02/14/1990 | CN1006801B Mixed metal layered hydroxide-clay adducts as thinckeners for water and other hydrophylic fluids |
| 02/13/1990 | US4900457 Aqueous polysaccharide compositions |
| 02/13/1990 | US4900456 Well bore fluid |
| 02/13/1990 | US4899819 Method for suspending wells |
| 02/13/1990 | US4899818 Method to improve use of polymers for injectivity profile control in enhanced oil recovery |
| 02/13/1990 | US4899817 Miscible oil recovery process using carbon dioxide and alcohol |
| 02/13/1990 | CA1265791A1 Process for the preparation of a modified polysaccharide and compositions comprising the same |
| 02/13/1990 | CA1265666A1 Crosslinked fracturing fluids |
| 02/13/1990 | CA1265665A1 Process for drilling mud additive preparation and additive for drilling mud |
| 02/08/1990 | DE3825585A1 Process for recovering crude oil by flooding with water with simultaneous use of nonionic, anionic and cationic surface-active substances |
| 02/07/1990 | EP0353740A1 Low density proppant and methods for making and using same |
| 02/07/1990 | EP0353469A1 Aqueous tenside compositions and their use in combination with a polymer in the winning of oil in highly saline formations |
| 02/06/1990 | US4898915 Alternating copolymerization of donor monomers having protected amine groups with acceptor monomers |
| 02/06/1990 | US4898819 Degassing with carbon dioxide, controlling ph with reducing-deoxidizing agent |
| 02/06/1990 | US4898750 Processes for forming and using particles coated with a resin which is resistant to high temperature and high pH aqueous environments |
| 02/06/1990 | US4898242 Method for suspending wells |
| 02/06/1990 | CA1265528A1 Water soluble polymers and compositions containing them |
| 02/06/1990 | CA1265437A1 Cyclic flooding of a naturally-fractured formation |
| 02/06/1990 | CA1265436A1 Oil recovery process using a delayed polymer gel |
| 02/06/1990 | CA1265325A1 Liquid foaming additives used in the stimulation of oil and gas wells |
| 01/30/1990 | US4896724 Method for suspending wells |
| 01/30/1990 | US4896723 Phenolic resin crosslinking |
| 01/30/1990 | CA1265297A1 Polymers for use as filtration control aids in drilling muds |
| 01/30/1990 | CA1264927A1 Aqueous spacer composition compatible with drilling muds and cement slurries including saline slurries, and application thereof to drilling oil and gas wells |
| 01/30/1990 | CA1264926A1 Mixed metal layered hydroxide-clay adducts as thickeners for water and other hydrophylic fluids |
| 01/25/1990 | WO1990000581A1 Improved method of forming stable dispersions of particulate matter |
| 01/23/1990 | US4895702 Forming films on metal tools and equipment used in drilling and servicing of gas and oil wells; high and low temperature and pressure resistant |
| 01/23/1990 | US4895660 Water-soluble aromatic polyamides and polyureas |
| 01/23/1990 | US4895207 Suspension in hydroxyethyl cellulose, thinning carrier to promote better packing |
| 01/23/1990 | US4895206 Combustion of high pressure gas, enhanced oil recovery |
| 01/23/1990 | CA1264657A1 Enhanced hydrocarbon recovery process utilizing thermoelastic fracturing |
| 01/17/1990 | EP0350548A1 Reducing permeability of highly permeable zones in underground formations |
| 01/17/1990 | CN1006467B Thinners for use in aqueons drilling slurry |
| 01/16/1990 | US4894335 Surfactants, xanthan gums |
| 01/16/1990 | US4894285 Hydraulic fracturing of subterranean formations |
| 01/16/1990 | US4894173 Enhanced oil recovery, anionic surfactants |
| 01/11/1990 | WO1990000187A1 Rock fragmentation method |
| 01/10/1990 | EP0350035A2 Method of forming stable dispersions of particulate matter |
| 01/10/1990 | EP0349681A1 Methods for treating hydrocarbon recovery operations and industrial waters |
| 01/09/1990 | US4892916 Polymeric thickeners and their production |
| 01/09/1990 | US4892898 Water soluble polymers containing allyloxybenzenesulfonate monomers |
| 01/09/1990 | US4892660 Semipermeable membrane, polysulfones |
| 01/09/1990 | US4892589 Hydraulic cement additive |
| 01/09/1990 | US4892148 Enhanced oil recovery, bactericides |
| 01/09/1990 | US4892147 Hydraulic fracturing utilizing a refractory proppant |
| 01/09/1990 | US4892146 Alkaline polymer hot water oil recovery process |
| 01/03/1990 | EP0348975A2 Copolymer of polymerizable components in naphtha oil and maleic anhydride, process for producing said copolymer, and derivatives thereof |