| 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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| 01/21/1992 | US5082577 Method and composition for selectively reducing permeability to water in hydrocarbon reservoirs which are hot and saline |
| 01/21/1992 | US5082499 Water, cement, calcium sulfate, acdelerator |
| 01/21/1992 | US5082059 Hydraulic fluids, enhanced oil recovery, nonionic, cationic and anionic surfactants |
| 01/21/1992 | US5082058 Composition and method for slowly dissolving siliceous material |
| 01/21/1992 | US5082057 Sand consolidation treatment for a hydrocarbon production well bore using an overdisplacement fluid |
| 01/21/1992 | US5082056 In situ reversible crosslinked polymer gel used in hydrocarbon recovery applications |
| 01/14/1992 | US5081209 Applying to a metal surface a mercaptan chain transfer agent modified poly(meth)acrylic acid |
| 01/14/1992 | US5080809 Polymers useful in the recovery and processing of natural resources |
| 01/14/1992 | US5080534 Low water materials transportation |
| 01/14/1992 | US5080171 Free radical generator |
| 01/14/1992 | US5080170 Method for reducing fluid leak-off during well treatment |
| 01/14/1992 | US5080169 Polysilalkylenesilane polymer useful in enhanced oil recovery using carbon dioxide flooding |
| 01/08/1992 | CN1057663A Composition for dissolving sulfer and process for its use |
| 01/07/1992 | US5079278 Enhanced oil recovery profile control with crosslinked anionic acrylamide copolymer gels |
| 01/07/1992 | US5078966 Corrosion protection for fluid catalytic cracking units |
| 01/03/1992 | CA2044843A1 Oil recovery technique employing non-ionic surfactants |
| 01/02/1992 | EP0463664A1 Treating an underground formation |
| 01/02/1992 | EP0463518A1 Terpolymers of ethylene, their preparation and their use for mineral oil distillates |
| 01/02/1992 | EP0463475A2 Composition for dissolving sulfur and process for its use |
| 12/31/1991 | US5076944 Seepage loss reducing additive for well working compositions and uses thereof |
| 12/31/1991 | US5076852 Drilling fluid, sulfonated styrene copolymers asdispersants; p romoters of acetic acid, esters thereof |
| 12/31/1991 | US5076373 Drilling fluids |
| 12/31/1991 | US5076364 Injecting carrier and alcohol |
| 12/31/1991 | US5076363 Water flooding |
| 12/31/1991 | US5076362 Subterranean formation permeability contrast correction methods |
| 12/31/1991 | US5076361 Gel method for decreasing permeability around a wellbore |
| 12/31/1991 | US5076359 Method for gravel packing wells |
| 12/31/1991 | US5076358 Able to release carbon disulfide into formation |
| 12/31/1991 | US5076357 Method of enhancing recovery of petroleum from an oil-bearing formation |
| 12/30/1991 | CA2045155A1 Terpolymers of ethylene, their preparation and their use as additives for mineral oil distillates |
| 12/30/1991 | CA2044989A1 Composition for dissolving sulfur and process for its use |
| 12/27/1991 | EP0462880A1 Method for consolidating a geological formation with a polymerisable substance and the temperature and pressure of the formation |
| 12/27/1991 | EP0462160A1 Use of selected low carboxylic acid ester oils in drilling muds |
| 12/27/1991 | EP0462152A1 Invert drilling muds |
| 12/27/1991 | EP0462151A1 Aqueous resin preparations for consolidating rock and filling cavities and process therefor. |
| 12/26/1991 | WO1991019771A1 Fluid borehole-conditioning agent based on polycarboxylic acid esters |
| 12/24/1991 | US5074991 Using diamino(m)ethane compound |
| 12/24/1991 | US5074358 Surfactant-stabilized foams for enhanced oil recovery |
| 12/19/1991 | CA2043510A1 Method for decreasing mobility of dense carbon dioxide in subterranean formations |
| 12/19/1991 | CA2041020A1 Lignin phenol/lignin/amine surfactant system |
| 12/18/1991 | EP0461584A2 Non-hydrocarbon invert emulsion for use in well drilling operations |
| 12/17/1991 | US5073276 Polymer article of manufacture |
| 12/17/1991 | US5073248 Using a blend of an alkylphenol-formaldehyde resin and a hydrophilic/lipophilic acrylic copolymer; antideposit and -fouling agents; transportation of petroleum or crude oils |
| 12/17/1991 | US5072794 Alcohol-in-oil drilling fluid system |
| 12/17/1991 | US5072791 Method of stabilizing formation prior to gravel packing |
| 12/17/1991 | CA1293184C Organic crosslinking of polymers for co _flooding profile control |
| 12/12/1991 | WO1991018974A1 HEMICELLULASE ACTIVE AT EXTREMES OF pH AND TEMPERATURE AND THE MEANS FOR THE PRODUCTION THEREOF |
| 12/12/1991 | WO1991018958A1 Free-flowing drill hole treatment agents based on carbonic acid diesters |
| 12/10/1991 | US5071934 Cationic hydrophobic monomers and polymers |
| 12/10/1991 | US5071890 In situ gelatin of phenolic resin with formation, polyvinyl alcohol polymer |
| 12/10/1991 | US5071575 Containing ground oat hulls |
| 12/04/1991 | EP0459881A1 Use of scleroglucane muds for the drilling of large diameter holes |
| 12/04/1991 | EP0459171A1 Method for inhibition of scale and scale inhibiting composition |
| 12/04/1991 | EP0458852A1 Thinned cement slurry for use in the cementation of wells for producing hydrocarbons |
| 12/04/1991 | CN1056674A Ceramic microspheres |
| 12/03/1991 | USH1000 Water based synthetic hydrocarbon drilling fluid and spotting fluid |
| 12/03/1991 | US5069802 Enhanced oil recovery |
| 12/03/1991 | US5069286 Anionic polymer sequesterant |
| 12/03/1991 | US5069283 Subterranean formations |
| 12/03/1991 | US5069281 Process for enhanced delayed in situ gelation of chromium polyacrylamide gels |
| 12/02/1991 | CA2035737A1 Rheologically-stable water-based high temperature drilling fluid |
| 12/01/1991 | CA2043382A1 Method of enhancing recovery of petroleum from an oil-bearing formation |
| 11/29/1991 | CA2043340A1 Application of scleroglucan containing sludges to large-diameter well drilling |
| 11/28/1991 | DE4016753A1 Poly:hydroxy:alkan:amino-bis(methylene:phosphonic acid) cpds. - useful as complexing agents, and prevent scaling e.g. machine cleaning and washing plant |
| 11/27/1991 | EP0457775A1 Monocarboxylic methyl esters in invert mineral oil muds |
| 11/27/1991 | EP0457774A1 Oleophilic basic amine compounds as additives in invert mineral oil muds |
| 11/26/1991 | US5068278 Novel polyampholyte compositions possessing high degrees of acid, base, or salt tolerance in solution |
| 11/26/1991 | US5068043 Preformed surfactant-optimized aqueous alkaline flood |
| 11/26/1991 | US5068042 Dissolution of sulfate scales |
| 11/26/1991 | US5067566 Low temperature degradation of galactomannans |
| 11/26/1991 | US5067565 Graft Copolymers with Vinylphosphonic Acid |
| 11/26/1991 | US5067564 Selective placement of a permeability-reducing material to inhibit fluid communication between a near well bore interval and an underlying aquifer |
| 11/26/1991 | CA2041513A1 Polyimide quaternary salts as clay stabilization agents |
| 11/20/1991 | CN1056334A Process for restoring the permeability of subterranean formation |
| 11/19/1991 | USRE33747 Rigidification of semi-solid agglomerations |
| 11/19/1991 | US5066753 Polymerizable cationic viscoelastic monomer fluids |
| 11/19/1991 | US5066745 Water-swellable crosslinked hydrogels, gel strength, absorption |
| 11/19/1991 | US5065822 Crosslinking water soluble polymers with iron to form gels for use in subterranean profile modification |
| 11/19/1991 | US5065820 Treatment Mixture Of A Non-Aqueous Carrier Liquid And A Sponge-Like Material |
| 11/17/1991 | WO1991018077A1 Lubricant composition |
| 11/17/1991 | CA2083264A1 Lubricant composition containing spherical particles |
| 11/12/1991 | US5064612 Acrylic acid-allyl hydroxypropylsulfonate ether copolymer mixture |
| 11/12/1991 | US5063997 Method of preventing precipitation of iron compounds during acid treatment of wells |
| 11/12/1991 | CA1291943C Method to improve matrix acidizing in carbonates |
| 11/12/1991 | CA1291867C Encapsulated breaker for cross-linked acid gel, fracture acidizing fluid containing same and method of use thereof |
| 11/11/1991 | CA2031568A1 Process for restoring the permeability of a subterranean formation |
| 11/06/1991 | EP0271564B1 Composition and method for slowly dissolving siliceous material |
| 11/05/1991 | US5062992 Emulsion minimizing corrosion inhibitor for naphtha/water systems |
| 11/05/1991 | US5062970 Surfactant composition |
| 11/05/1991 | US5062969 Enhanced oil recovery |
| 11/05/1991 | US5062484 Method of gravel packing a subterranean well |
| 11/05/1991 | CA1291704C Process for passing carbon dioxide through a cased, cemented and perforated well |
| 10/31/1991 | WO1991016522A1 Dispersant compositions for subterranean well drilling and completion |
| 10/31/1991 | WO1991016365A1 Dispersant compositions for subterranean well drilling and completion |
| 10/31/1991 | CA2081465A1 Dispersant compositions for subterranean well drilling and completion |
| 10/30/1991 | EP0454057A2 A suspending medium for water soluble polymer |
| 10/30/1991 | EP0453625A2 Drilling methods and composition of fluid therefor |
| 10/29/1991 | US5061387 Aqueous gel system of partially methylated melamine-formaldehyde resin and polyvinyl alcohol |
| 10/29/1991 | US5061386 Surfactant composition |
| 10/29/1991 | US5060728 Process for preventing scale formation in oil wells |