| 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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| 07/10/1990 | US4940090 Acrylamido-or sulfonated vinyl ether comonomer, enhanced oil recovery |
| 07/10/1990 | CA1271320A1 Drilling fluid |
| 07/09/1990 | CA2002037A1 Method for setting well casing using a resin coated particulate |
| 07/04/1990 | EP0376094A2 Process for hardening an injection agent |
| 07/03/1990 | US4939293 Sulfonated phenolic material and its use in post primary oil recovery |
| 07/03/1990 | US4939203 Gel for retarding water flow |
| 07/03/1990 | US4938925 Method of inhibiting corrosion using N-S containing compounds |
| 07/03/1990 | US4938803 Nonhydrolyzing |
| 07/03/1990 | US4938288 Non-damaging workover and completion fluid |
| 07/03/1990 | US4938287 Sand consolidation methods |
| 07/03/1990 | CA2006966A1 Temperature activated polymer for profile control |
| 07/03/1990 | CA2005853A1 Method for plugging a high permeability zone with a heat activated gel |
| 07/03/1990 | CA1271161A1 Process and apparatus for the production of a solution or dispersion from a hydrosoluble powder |
| 07/03/1990 | CA1271150A1 Microbial enhancement of polymer viscosity |
| 07/03/1990 | CA1271129A1 Consolidation process of a geological formation through thermal polymerisation |
| 07/03/1990 | CA1271127A1 Accelerated polymer gelation process for oil recovery applications |
| 06/28/1990 | WO1990006981A1 Use of selected diester oils as drilling fluids, in particular for exploiting off-shore petroleum or natural gas deposits (ii) |
| 06/28/1990 | WO1990006980A1 Use of selected ester oils in bore-flushing fluids, particularly for the development of offshore oil and gas fields (i) |
| 06/27/1990 | EP0374672A1 Use of selected fatty esters in drilling fluids, especially in offshore oil or gas recovery |
| 06/27/1990 | EP0374671A1 Use of selected ester oils in drilling fluids, especially for off-shore oil or gas recovery |
| 06/27/1990 | EP0374229A1 Emulsifiers for oil based drilling fluids |
| 06/27/1990 | CN1043332A Well treating fluids and additives therefor |
| 06/26/1990 | US4936386 Method for sealing well casings in the earth |
| 06/26/1990 | US4936385 Driving acid curable resin into wellbore, hardening, forming sieve |
| 06/26/1990 | US4936384 To control lost circulation, to improve compressive strength and water permeability in geothermal and oil wells |
| 06/26/1990 | CA1270996A1 Hydrophobe associative composition containing a polymer of water-soluble monomer and an amphiphilic monomer |
| 06/26/1990 | CA1270850A1 Solid composition for dispersion in an organic medium |
| 06/26/1990 | CA1270815A1 Alkylated oxidized lignins as surfactants |
| 06/21/1990 | CA2004526A1 Polymer-coated support and it's use as sand pack in enhanced oil recovery |
| 06/19/1990 | US4935060 Hydraulic cement slurry |
| 06/19/1990 | US4934457 Composition and method for stimulating wells |
| 06/19/1990 | US4934456 Method for altering high temperature subterranean formation permeability |
| 06/14/1990 | WO1990006054A1 Anti-microbial agent |
| 06/13/1990 | EP0373031A1 Homopolysaccharide and solution containing it, process for their preparation, and their use in the assisted recovery of petroleum |
| 06/13/1990 | EP0372469A2 Well treating fluids and additives therefor |
| 06/13/1990 | CN1042887A Inhibition of reservoir scale |
| 06/12/1990 | US4933378 Fluid loss control additives for oil well cementing compositions |
| 06/12/1990 | US4933031 Hydraulic cement slurry |
| 06/12/1990 | US4932473 Enhancing the salt tolerance of aqueous sulfonate surfactant solutions |
| 06/12/1990 | CA1270347A1 Acrylic emulsion copolymers for thickening aqueous systems and copolymerizable surfactant monomers for use therein |
| 06/12/1990 | CA1270188A1 Process for selectively treating a subterranean formation using coiled tubing without affecting or being affected by the two adjacent zones |
| 06/07/1990 | CA2004759A1 Homopolysaccharide and solution containing the same; process for preparing them use for the supported recovering of oil |
| 06/06/1990 | EP0371667A2 Inhibition of reservoir scale |
| 06/06/1990 | EP0371616A1 Polyampholytic polymers and method of using same at high temperature |
| 06/05/1990 | US4931527 With acrylamide and diallyldimethylammonium chloride, for enhanced oil recovery as flow control agent |
| 06/05/1990 | US4931489 Fluid loss control additives for oil well cementing compositions |
| 06/05/1990 | US4931194 Enhanced oil recovery with high molecular weight polyvinylamine formed in-situ |
| 06/05/1990 | US4930575 Method of protecting a permeable formation |
| 06/05/1990 | CA2001029A1 Well treating fluids and additives therefor |
| 06/02/1990 | CA2004556A1 Anti-microbial agent |
| 05/31/1990 | WO1990005714A1 Self-emulsifying ester compounds |
| 05/30/1990 | EP0370911A1 Concentrated liquid solutions of polysaccharides |
| 05/29/1990 | US4928766 Stabilizing agent for profile control gels and polymeric gels of improved stability |
| 05/29/1990 | US4928763 Method of treating a permeable formation |
| 05/29/1990 | CA1269584A1 Oil well biocide |
| 05/23/1990 | EP0368956A1 Quaternary ammonium dithiocarbamate compounds |
| 05/23/1990 | EP0162910B1 Polymer article of manufacture |
| 05/23/1990 | CN1008128B Production of polyacrylamide solution used in oil recovery process |
| 05/23/1990 | CN1008114B Water-in-oil emulsion |
| 05/22/1990 | US4927669 Oil field corrosion inhibition |
| 05/22/1990 | US4926944 Hydraulic cement, water and lignin crosslinked with formalde-hyde, epichlorohydrin, allkoxylated with ethylene, propylene or butylene oxide |
| 05/22/1990 | US4926943 Phenolic and naphtholic ester crosslinked polymeric gels for permeability profile control |
| 05/22/1990 | CA1269227A1 Topical viscosity control for light hydrocarbon displacing fluids in petroleum recovery and in fracturing fluids for well stimulation |
| 05/16/1990 | EP0368563A2 Drilling fluid additives |
| 05/15/1990 | US4925578 Polymer-thickened aqueous solutions containing a mercaptobenzothiazole |
| 05/15/1990 | US4925247 Method for particle stabilization by use of cationic polymers |
| 05/15/1990 | US4924942 Using thixotropic preflush fluid of water, cement, calcium sulfate and hardener |
| 05/15/1990 | CA1269093A1 Stabilized fracture fluid and crosslinker therefor |
| 05/15/1990 | CA1268936A1 Method for improving production of viscous crude oil |
| 05/15/1990 | CA1268935A1 Process for strengthening and sealing geological formations |
| 05/10/1990 | DE3936698A1 Hydrolysierte copolymere von n-vinylamid und acrylamid zur verwendung als zusatzstoffe zur regelung des wasserverlustes im bohrschlamm Hydrolyzed copolymers of n-vinyl and acrylamide for use as additives for control of water loss in the mud |
| 05/08/1990 | US4923714 Novolac coated ceramic particulate |
| 05/08/1990 | US4923516 Well cement slurries and dispersants therefor |
| 05/08/1990 | US4923009 Steam enhanced oil recovery processes and compositions for use therein |
| 05/02/1990 | CN1041770A Water-dispersible hydrophobic thickener |
| 05/02/1990 | CN1041738A Process for preparing sulfur solvent compositions |
| 05/02/1990 | CN1007832B Process for delaying gelatification of water-solubility polymer |
| 05/01/1990 | US4921821 Lightweight oil and gas well proppants and methods for making and using same |
| 05/01/1990 | US4921820 Lightweight proppant for oil and gas wells and methods for making and using same |
| 05/01/1990 | US4921635 Mixing with semi-fluorinated alkane |
| 05/01/1990 | US4921621 Hydrolyzed co-polymers of N-vinylamide and acrylamide for use as waterloss control additives in drilling mud |
| 05/01/1990 | US4921620 Chrome humates as drilling mud additives |
| 05/01/1990 | US4921619 Oil is lifted from the sand without otherwise disturbing the formation |
| 05/01/1990 | US4921576 Method for improving sweep efficiency in CO2 oil recovery |
| 05/01/1990 | CA1268325A1 Fracturing process for low permeability reservoirs employing a compatible hydrocarbon-liquid carbon dioxide mixture |
| 04/25/1990 | EP0365390A1 Process for the production of polysaccharides by fermentation of a carbon source using microorganisms |
| 04/25/1990 | EP0364703A2 Process for preparing sulfur solvent compositions |
| 04/25/1990 | EP0364543A1 Viscosity-modifiers for aqueous-based functional products |
| 04/25/1990 | EP0364511A1 Water-in-oil emulsions |
| 04/24/1990 | US4920192 Well completion |
| 04/24/1990 | US4919989 Article for sealing well castings in the earth |
| 04/24/1990 | US4919827 Multicomponent organic liquid and use thereof in treating wells and subterranean formations |
| 04/24/1990 | US4919209 Method for treating subterranean formations |
| 04/24/1990 | CA1268298A1 AMORPHOUS HIGH MOLECULAR WEIGHT COPOLYMERS OF ETHYLENE AND .alpha.-OLEFINS |
| 04/24/1990 | CA1268293A1 Method of producing polymers and copolymers of amido- sulfonic acid containing monomers and salts thereof |
| 04/17/1990 | US4918181 Tertiaryaminoalkyl-hydroxyalkyl ethers of polygalactomannans |
| 04/17/1990 | US4917808 Composition for recovery of oil by surfactant flooding with a mixture of carboxymethylated oxethylate and a sorbitan ester |
| 04/17/1990 | US4917188 Method for setting well casing using a resin coated particulate |
| 04/17/1990 | US4917186 Altering subterranean formation permeability |
| 04/17/1990 | US4917185 Gel forming melamine-formaldehyde resin |