| 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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| 01/03/1990 | CN1038488A Delayed in situ crosslinking of acrylamide polymers for oil recovery applications in high-temp. formations |
| 01/02/1990 | US4891177 Water-flood surfactant |
| 01/02/1990 | US4891155 Preparation of alkyl aryl sulfonate concentrates having low viscosity |
| 01/02/1990 | US4891072 Anchoring bolts in drillholes |
| 12/27/1989 | EP0347975A2 Delayed crosslinking system for fracturing fluids |
| 12/27/1989 | CN1038327A Recovery of oil from oil reservoirs |
| 12/26/1989 | US4889902 Soluble or crosslinked graft copolymers of lignin acrylamide and 2-hydroxyethylmethacrylate |
| 12/26/1989 | US4889887 Crosslinked n-(alkoxymethylene)acrylyl compounds |
| 12/26/1989 | US4889645 Quaterized with dicocodimethyl ammonium chloride |
| 12/26/1989 | US4889563 Process for retarding and controlling the formation of gels or precipitates derived from aluminium and corresponding compositions, plus the corresponding applications-in particular regarding oil wells |
| 12/22/1989 | EP0274523A4 Organophilic polyphenolic acid adducts. |
| 12/19/1989 | US4888240 High strength particulates |
| 12/19/1989 | US4888121 Compositions and method for controlling precipitation when acidizing sour wells |
| 12/19/1989 | US4888120 Water-based drilling and well-servicing fluids with swellable, synthetic layer silicates |
| 12/19/1989 | US4887671 Penetrating underground formation by injecting, pressurizing; hydrocarbon recovery |
| 12/19/1989 | CA1263912A1 Method for acidizing siliceous formations |
| 12/19/1989 | CA1263911A1 Sulfonated poly (vinyl aromatics) as fluid loss additives for salt cement slurries |
| 12/14/1989 | WO1989012158A1 Miscible gas enhanced oil recovery method using ethoxylated alkylphenol sulfonate |
| 12/14/1989 | WO1989012157A1 Liquid composition for production of a gel, and process for inserting such gel in a well |
| 12/13/1989 | EP0346097A2 Thickening system |
| 12/12/1989 | US4886609 Mixture of aqueous mineral acid, mutual solvent and alkyl or aralkyl polyoxyalkylene phosphate ester |
| 12/12/1989 | US4886550 Flexible grout composition and method |
| 12/12/1989 | US4886120 Water flooding |
| 12/12/1989 | CA1263838A1 Permeability restoration of damaged formations |
| 12/06/1989 | EP0344818A2 A method of using polymeric compositions |
| 12/05/1989 | US4885111 Corrosion inhibitors and demulsifiers of crude oil emulsions |
| 12/05/1989 | US4885103 Plugging subterranean formations |
| 12/05/1989 | US4884636 Delaying the gelation of water soluble polymers |
| 12/05/1989 | US4884635 Injection into well |
| 12/04/1989 | EP0287576A4 Method to control and produce novel biopolymers. |
| 11/30/1989 | WO1989011516A1 Emulsifiers for oil based drilling fluids |
| 11/30/1989 | WO1989011504A1 Xanthan concentrate, process of preparing thereof and use thereof by increased recovery of oil from subterranean formations |
| 11/29/1989 | EP0343689A2 Method for plugging lost circulation areas |
| 11/29/1989 | EP0343427A2 Hydrogele prepared by using Alkenyl-phosphonic and phosphinic acid esters as cross-linking agents. |
| 11/29/1989 | EP0343294A1 Reducing permeability of highly permeable zones in subterranean formations |
| 11/28/1989 | US4883605 Hydraulic fracturing fluids, polysaccharides |
| 11/28/1989 | US4883125 Cementing oil and gas wells using converted drilling fluid |
| 11/28/1989 | US4883124 Method of enhancing hydrocarbon production in a horizontal wellbore in a carbonate formation |
| 11/28/1989 | CA1263302A1 Process for remedial cementing |
| 11/28/1989 | CA1263226A1 Thermally responsive aqueous silicate mixtures and use thereof |
| 11/28/1989 | CA1263225A1 Dispersants for drilling fluids, and drilling fluids containing same |
| 11/23/1989 | EP0342500A2 Fluid loss control additives for oil well cementing compositions |
| 11/21/1989 | US4882075 Acidic surfactant solvent composition |
| 11/16/1989 | WO1989010956A1 Quaternary ammonium dithiocarbamate compounds |
| 11/15/1989 | EP0341976A2 Thermal insulating fluid |
| 11/14/1989 | US4880057 Injecting reverse osmosis desalinization product water and carbon dioxide |
| 11/14/1989 | CA1262916A1 Preparation of surfactants |
| 11/14/1989 | CA1262896A1 Titanium-glycol useful as crosslinking agents for polygalactomannans |
| 11/14/1989 | CA1262821A1 Process for oil recovery from subterranean reservoir rock formations |
| 11/14/1989 | CA1262820A1 Process of extraction of oil by means of water flooding |
| 11/14/1989 | CA1262819A1 Method for emplacement of a gelatinous foam in gas flooding enhanced recovery |
| 11/08/1989 | CN1005730B Oil mining method by using delayed polymer gel |
| 11/08/1989 | CN1005729B Improvement of spreading coefficient of oil-bearing stratum by polymer gel |
| 11/07/1989 | US4879240 Thiobacillus, oil recovery |
| 11/07/1989 | US4879181 Sintered spherical pellets containing clay as a major component useful for gas and oil well proppants |
| 11/07/1989 | CA1262783A1 Oxidation of sulfides in polymer-thickened aqueous solution |
| 11/02/1989 | WO1989010463A1 Recovery of oil from oil reservoirs |
| 11/02/1989 | EP0339762A2 Defoamer composition for use in water based drilling fluids |
| 11/02/1989 | EP0339372A2 Method and composition for thickening or stabilizing aqueous media with polyamphoteric polysaccharides |
| 10/31/1989 | US4877894 Polyphosphate-mixed alcohol reaction product |
| 10/31/1989 | US4877542 Heavy oil, light oil, smectite clay, calcium oxide, sodium silicate |
| 10/31/1989 | US4877452 High strength, heat resistance |
| 10/31/1989 | CA1262508A1 Composition and method for temporarily reducing the permeability of subterranean formations |
| 10/31/1989 | CA1262507A1 Polymer article and its use for controlled introduction of reagent into a fluid |
| 10/25/1989 | EP0338161A1 Treating subterranean formations with delayed crosslinking gels |
| 10/24/1989 | US4876030 Mixture with hydrocarbon oil and phenyl hydroxyalkyl ether or phenylalkanol |
| 10/24/1989 | US4876017 Use of polyalphalolefin in downhole drilling |
| 10/24/1989 | US4875809 Aqueous mixture of group 1a, 2a or ammonium cations |
| 10/24/1989 | US4875525 Consolidated proppant pack for producing formations |
| 10/17/1989 | US4874044 Method for oil recovery using a modified heteropolysaccharide |
| 10/10/1989 | US4873323 Acid/heat modified polysaccharide biopolymers |
| 10/10/1989 | US4873025 Alkylxylene sulfonate compositions |
| 10/04/1989 | EP0334944A1 Apparatus and method for removing and recovering oil and/or other oil-based drilling mud additives from drill cuttings |
| 10/03/1989 | US4871395 Geothermal wells; compressive strength |
| 10/03/1989 | US4871022 Method for removing polymer plugging in well boreholes |
| 10/03/1989 | US4871021 Block copolymers useful for enhanced oil recovery processes |
| 10/03/1989 | CA1262039A1 Production of polyacrylamide solution used in an oil recovery process |
| 09/27/1989 | CN1035814A Cement slurry |
| 09/26/1989 | US4870167 Hydrophobically modified non-ionic polygalactomannan ethers |
| 09/26/1989 | US4870137 Novel n-substituted polyamide type polymers, their method of preparation and their use as additives for crude petroleum oils |
| 09/26/1989 | US4869960 Epoxy novolac coated ceramic particulate |
| 09/26/1989 | US4869732 Microporous hollow fibers |
| 09/26/1989 | CA1261608A1 Water-based metal-containing organic phosphate compositions |
| 09/26/1989 | CA1261607A1 Aqueous sulfomethylated melamine gel-forming compositions |
| 09/26/1989 | CA1261606A1 Cement compositions for cementing of wells enabling gas channelling in the cemented annulus to be inhibited by right angle setting |
| 09/26/1989 | CA1261605A1 Oil recovery process using a viscosity adjusted gelation system |
| 09/26/1989 | CA1261604A1 Encapsulated lime as a lost circulation additive for aqueous drilling fluids |
| 09/26/1989 | CA1261134A1 Acidizing concentrates for oil well acidizing systems |
| 09/26/1989 | CA1261133A1 Use of mono- and polyalkylene glycol ethers as agents for the release of differentially stuck drill pipe |
| 09/26/1989 | CA1261132A1 Drilling fluid additive containing high pyruvate xanthan |
| 09/26/1989 | CA1261131A1 Composition for a lightweight cement slurry for cementing oil and gas wells |
| 09/26/1989 | CA1261130A1 Ferrofluids for use in cementing wells |
| 09/26/1989 | CA1260692A1 Method for releasing stuck drill string |
| 09/26/1989 | CA1260254A1 Process for strengthening geological formations |
| 09/26/1989 | CA1260253A1 Method of strengthening geological formations |
| 09/26/1989 | CA1260252A1 Ether-amine oxides, a process for their preparation, and their use as surfactants for tertiary oil recovery |
| 09/26/1989 | CA1259789A1 Method of preventing precipitation of ferrous sulfide and sulfur during acidizing |
| 09/21/1989 | WO1989008768A1 Method for enhanced recovery of hydrocarbone |
| 09/21/1989 | WO1989008693A1 Viscosity-modifiers for aqueous-based functional products |
| 09/21/1989 | WO1989008148A3 Process for preparing aqueous suspensions or slurries from cellulose microfibrils, cellulose microfibril aqueous suspension or slurry and its use |