| 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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| 11/27/1990 | US4973775 Process for delaying the formation and/or reducing the agglomeration tendency of hydrates |
| 11/27/1990 | US4973710 Water soluble 1,2-dithio-3-thiones |
| 11/27/1990 | US4973410 Crosslinked vinylamine polymer in enhanced oil recovery |
| 11/27/1990 | US4973201 Method for removing scale and radioactive material from earth |
| 11/27/1990 | US4972906 Method for selective plugging of a zone in a well |
| 11/27/1990 | CA1277086C2 Acrylic emulsion copolymers for thickening aqueous systems and copolymerizable surfactant monomers for use therein |
| 11/27/1990 | CA1276926C Delayed crosslinker composition |
| 11/27/1990 | CA1276862C Method of removing scale from wet oxidation treatment apparatus |
| 11/22/1990 | EP0398576A2 Multi-stage polymer particle having a hydrophobically-modified ionically soluble stage |
| 11/22/1990 | EP0398113A1 Use of selected ester oils in water based drilling fluids of the oil in water emulsion type, and drilling fluids with improved ecological qualities |
| 11/22/1990 | EP0398112A1 Use of selected oleophilic alcohols in water based drilling fluids of the oil-in-water emulsion type and drilling fluids with improved ecological properties |
| 11/20/1990 | WO1990014403A1 Polymeric compositions |
| 11/20/1990 | US4972007 Use of cellulose derivatives in drilling fluids |
| 11/20/1990 | US4971709 Method and composition for inhibiting corrosion of ferrous metals by aqueous brines |
| 11/20/1990 | US4971707 Adding a salt to change the phase, use of the solution in recovery of hydrocarbons from underground formations |
| 11/20/1990 | US4971151 Recovery of oil from oil reservoirs |
| 11/20/1990 | US4971150 Flooding with steam or carbon dioxide for oil wells |
| 11/20/1990 | CA2033075A1 Polymeric compositions |
| 11/20/1990 | CA1276443C Corrosion inhibitor composition |
| 11/15/1990 | WO1990013732A1 Non-damaging workover and completion fluid |
| 11/14/1990 | EP0396983A1 Drilling fluids comprising thixotropic gel forming substances |
| 11/13/1990 | US4970260 Novel viscosifiers for salt-containing solutions based on polymer complexes |
| 11/13/1990 | US4970251 Viscous polymer solution |
| 11/13/1990 | US4970007 Aqueous surfactant mixtures, and the use thereof in the recovery of crude oil |
| 11/13/1990 | US4969526 Non-interfering breaker system for delayed crosslinked fracturing fluids at low temperature |
| 11/13/1990 | US4969523 Method for gravel packing a well |
| 11/13/1990 | US4969522 Polymer-coated support and its use as sand pack in enhanced oil recovery |
| 11/07/1990 | WO1990013608A1 Agent for increasing viscosity in non-aqueous fluid phases, process of making it and its use |
| 11/07/1990 | CA2057024A1 Agent for increasing viscosity in non-aqueous fluid phases, process of making it and its use |
| 11/06/1990 | USH837 Drilling fluids based on polymer complexes |
| 11/06/1990 | US4968442 Enhanced oil recovery |
| 11/06/1990 | US4967839 Portland cement, tricalcium aluminate, gypsum, polyvinyl acetate-polyvinyl alcohol copolymers |
| 11/06/1990 | US4967838 Oil well and method using completion fluid |
| 11/06/1990 | US4967837 Steam enhanced oil recovery method using dialkyl aromatic sulfonates |
| 11/06/1990 | CA1275794C Adducts of propargyl alcohol and their use as corrosion inhibitors in acidizing systems |
| 11/06/1990 | CA1275793C Carboxymethyl guar based drilling fluids |
| 11/06/1990 | CA1275792C Conformance improvement in a subterranean hydrocarbon- bearing formation using a polymer gel |
| 11/05/1990 | CA2011951A1 Steam enhanced oil recovery processes and compositions for use therein |
| 11/01/1990 | WO1990012822A1 Polymers for use in drilling |
| 10/31/1990 | EP0395282A2 Thickened aqueous compositions |
| 10/31/1990 | EP0394505A1 Crosslinkable, sulfonated, aromatic polyamides and polyureas |
| 10/30/1990 | US4966237 Method of effecting expanding chemical anchor/seals for rock cavities |
| 10/23/1990 | US4964999 Process for forming stable emulsions of water soluble polysaccharides in hydrocarbon liquids |
| 10/23/1990 | US4964918 Grouting composition |
| 10/23/1990 | US4964615 Mixture of fatty acid ester, thickener, and emulsifier |
| 10/23/1990 | US4964468 Emulsificaiton |
| 10/23/1990 | US4964467 Non-aqueous viscosified carbon dioxide and method of use |
| 10/23/1990 | US4964466 Hydraulic fracturing with chlorine dioxide cleanup |
| 10/23/1990 | US4964465 Method employing liquidized sand for controlling lost circulation of drilling fluids |
| 10/23/1990 | US4964463 Controlling permeability of subterranean oil bearing formations |
| 10/23/1990 | US4964461 Enhanced oil recovery using a thickener with a rapid crosslinker and a delayed one |
| 10/23/1990 | CA1275525C Polymeric viscosifier for water-immiscible liquids |
| 10/23/1990 | CA1275356C Method of reducing permeability in subterranean formation by use ofalkali metal silicate foam |
| 10/18/1990 | WO1990012070A1 Oleophilic alcohols for use as a component of invert drilling-oil muds |
| 10/18/1990 | WO1990012069A1 Use of selected ethers of monohydric alcohols in drilling-oil muds |
| 10/18/1990 | WO1990011972A1 Sulfate scale dissolution |
| 10/17/1990 | CN1046177A Altering high temp. subterranean formation permebility |
| 10/17/1990 | CN1046176A Water-wettable drilling mud additives containing uintaite |
| 10/16/1990 | US4963597 Selective gel system for permeability profile control |
| 10/16/1990 | US4963273 Modified non-polluting liquid phase shale swelling inhibition drilling fluid and method of using same |
| 10/16/1990 | CA1275347C Calcium-tolerant n-substituted acrylamides as thickeners for aqueous systems |
| 10/16/1990 | CA1275345C Clay stabilizing agent preparation and use |
| 10/16/1990 | CA1275166C Method for stabilizing clay minerals in course of mineral oil exploitation with steam injection |
| 10/11/1990 | WO1990011977A1 Procedure for the admixture of silicon oxide to a hydraulic cement slurry |
| 10/10/1990 | EP0391252A1 Oleophilic alcohols as components of invert-emulsion drilling fluids |
| 10/10/1990 | EP0391251A1 Use of selected ethers of monofunctional alcohols in drilling fluids |
| 10/10/1990 | CN1045989A Well-drilling composition diluent |
| 10/09/1990 | US4961466 Method for effecting controlled break in polysaccharide gels |
| 10/04/1990 | WO1990012159A1 Method of decontaminating earth and/or natural gas processing equipment |
| 10/03/1990 | EP0390387A1 Clay treatment to remove adsorbed polysaccharides |
| 10/03/1990 | EP0390317A2 Corrosion inhibitor and its use |
| 10/03/1990 | EP0390282A1 Gellable aqueous composition and its use in enhanced petroleum recovery |
| 10/03/1990 | EP0390281A1 Gellable buffered aqueous composition and its use in enhanced petroleum recovery |
| 10/03/1990 | EP0390280A1 Method and composition for reducing the permeability of a high permeability zone in an oil reservoir |
| 10/03/1990 | EP0390279A1 Gellable aqueous composition and its use in enhanced petroleum recovery |
| 10/03/1990 | EP0390137A1 Altering high temperature subterranean formation permeability |
| 10/03/1990 | EP0225873B1 Crosslinked fracturing fluids |
| 10/02/1990 | US4960876 Modified galactomannans and process for their preparation |
| 10/02/1990 | US4960821 Compatible mixtures of cationic viscoelastic monomer fluids and cationic-alkyl containing copolymers |
| 10/02/1990 | US4960740 Adducts of smectite clay with phosphoglycerides, such as soybean lecithin; oil well working fluids |
| 10/02/1990 | US4960527 Delayed crosslinking of guar gelling agents with ceric salts |
| 10/02/1990 | CA1274797A1 Treatment to retard deposition of paraffin and asphaltines from crude oil onto storage and transfer surfaces with alkali metal hydroxides |
| 10/02/1990 | CA1274767A1 Method for treating subterranean formations |
| 09/30/1990 | CA2013514A1 Steam enhanced oil recovery method using dialkyl aromatic sulfonates |
| 09/29/1990 | CA2011790A1 Altering high temperature subterranean formation permeability |
| 09/26/1990 | EP0368956A4 Quaternary ammonium dithiocarbamate compounds |
| 09/25/1990 | US4959441 Crosslinking agents |
| 09/25/1990 | US4959432 Acid viscosifier compositions |
| 09/25/1990 | US4959165 Calcium chloride, weighting agents, thickeners |
| 09/25/1990 | US4959164 Polyoxyethylene glycol as neutralizer for cutting, polishing, grinding fluids |
| 09/25/1990 | US4959163 Polyampholytes-high temperature polymers and method of use |
| 09/25/1990 | US4958685 Method for plugging lost circulation areas and lost circulation material to be used therefor |
| 09/25/1990 | CA1274381A1 Method of improving conformance in steam floods with carboxylate steam foaming agents |
| 09/25/1990 | CA1274380A1 Well bore fluid |
| 09/25/1990 | CA1274379A1 Corrosion inhibitor for well acidizing treatments |
| 09/20/1990 | WO1990010682A1 Use of selected low carboxylic acid ester oils in drilling muds |
| 09/20/1990 | WO1990010681A1 Invert drilling muds |
| 09/20/1990 | DE3908628A1 Briquetting of clay powder mixtures with additives on roll presses with mould cavities and processing of these briquettes to create water-impermeable barrier layers |
| 09/19/1990 | EP0163698B1 Method for controlled introduction of reagent into a liquid |
| 09/19/1990 | CN1009671B Micellar slug for oil recovery |