| 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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| 07/23/1996 | US5538081 Method of increasing the amount of hydrocarbons from an undeground reservoir |
| 07/18/1996 | WO1996021798A1 Method of degrading cellulose-containing fluids during completion operations of oil and gas wells |
| 07/18/1996 | WO1996021796A1 Method and water-based fluid using hydrophobically modified guars as a filtrate reducer |
| 07/17/1996 | EP0722036A1 Method and aqueous fluid using hydrophobically modified guar guns as fluid loss reducers |
| 07/17/1996 | EP0721534A1 Control of iron deposition in borehole pumps |
| 07/17/1996 | EP0530204B1 Dispersant compositions for subterranean well drilling and completion |
| 07/17/1996 | CN1126745A Lubricating composition including an esteruse of the composition and well fluid including the composition |
| 07/16/1996 | US5536706 Use of butadiene-styrene copolymers in crude oils |
| 07/16/1996 | US5536311 Set retarded cement compositions, additives and methods |
| 07/16/1996 | US5535834 Pumping liquid mixture containing alkyl or aryl metal sulfonate and solvent down drill stem with drilling mud to coat and lubricate drill and bore, also to flush cutting residues from bore |
| 07/11/1996 | WO1996021084A1 Acid treatment method for siliceous formations |
| 07/11/1996 | WO1996020899A1 Thixotropic materials |
| 07/11/1996 | DE19512731C1 Flooding agent used to recover oil and natural gas from underground deposits |
| 07/10/1996 | EP0721050A2 Sand control without requiring a gravel pack screen |
| 07/10/1996 | CN1126486A Plugging liquid for plugging a subterranean formation zone |
| 07/03/1996 | EP0599832B1 Scale inhibition in oil producing wells |
| 07/03/1996 | CN1125813A Process for the entraction of crude oil |
| 07/02/1996 | US5532212 Composition comprising a viscosity promoter and a magnesium compound and process using the composition |
| 07/02/1996 | US5532211 Zirconium complex of 1-hydroxycarboxylic acids, aluminum citrate |
| 07/02/1996 | US5531934 Method of inhibiting corrosion in aqueous systems using poly(amino acids) |
| 07/02/1996 | US5531895 Method and apparatus for installing and removing biologically structured wall systems |
| 07/02/1996 | US5531274 Method of fracturing a subsurface earth formation having a wellbore |
| 07/02/1996 | US5531272 Low temperature underwater epoxy system for zone isolation, remedial cementing, and casing repair |
| 06/27/1996 | WO1996019638A1 Method for reducing the crystallization temperature of a carbon disulfide precursor-containing solution and resulting compositions |
| 06/27/1996 | WO1996019637A1 Method for modifying gelation time of organically crosslinked, aqueous gels |
| 06/27/1996 | WO1996019636A1 Oil and gas field chemicals |
| 06/27/1996 | WO1996019545A1 High density wellbore fluid |
| 06/27/1996 | WO1996019544A2 Drill-in fluids and drilling methods |
| 06/27/1996 | CA2208440A1 Oil and gas field chemicals |
| 06/26/1996 | EP0718464A1 Well treatment using particulate blends |
| 06/26/1996 | EP0718237A2 Method of activation of clay and activated clay |
| 06/26/1996 | EP0662188A4 Method for cement placement in horizontal wells. |
| 06/26/1996 | CN1125472A Acidising underground reservoirs |
| 06/25/1996 | US5530131 N-alkyl-n'-poly(oxyalkyl)-hexahydropyrimidines |
| 06/25/1996 | US5529125 Acid treatment method for siliceous formations |
| 06/25/1996 | US5529123 Method for controlling fluid loss from wells into high conductivity earth formations |
| 06/25/1996 | US5529122 Method for altering flow profile of a subterranean formation during acid stimulation |
| 06/25/1996 | CA2151125C Hydrocarbon gels useful in formation fracturing |
| 06/20/1996 | WO1996018802A1 Material and method for lubricating the metal surfaces of an earth-pressure tunnel boring machine |
| 06/19/1996 | EP0717167A2 Utilisation of derivatives of glycin-N,N-diacetic acid as complexing agents for earthalkali and heavy metal ions during the recuperation and transportation of oil and gas |
| 06/19/1996 | EP0717051A1 Process for obtaining grinding and/or dispersion aids by means of physico-chemical separation, thus obtained aids and their uses |
| 06/19/1996 | EP0636202B1 Use of pressurized medium in drilling |
| 06/12/1996 | EP0715635A1 Water-soluble copolymerizates containing carboxyl groups, methods of producing said copolymerizates, and use thereof as scale inhibitors |
| 06/11/1996 | US5525587 Application of muds containing scleroglucan to drilling large diameter wells |
| 06/11/1996 | US5525257 Composition for water treatment containing polyaspartic acidora derivative thereof and a polcarboxylic acid and methods of using the composition |
| 06/11/1996 | US5525009 Material handling; mixture of liquid, binder and fibers |
| 06/11/1996 | US5524717 Method of using a pressurized medium in drilling |
| 06/11/1996 | US5524709 Method for acoustically coupling sensors in a wellbore |
| 06/06/1996 | WO1996017154A1 Ultra-high temperature stable gels |
| 06/05/1996 | EP0714978A1 Gel of a non-polar medium, and its use for preparing water-based drilling fluids |
| 06/04/1996 | US5523470 Surfactant, process for its production and use |
| 06/04/1996 | US5523023 Water treatment/cleaning composition comprising polyaspartic acid or derivatives thereof and phosphonic acid |
| 06/04/1996 | US5522460 Injection of resin/water miscible organic solvent solution followed by a spacer volume of water and acid catalyst injection |
| 05/30/1996 | WO1996016113A2 Polymeric composites with crystalline mixed metal hydroxide particles dispersed therein |
| 05/29/1996 | EP0713909A1 Lubricating oil composition containing an ester, use thereof and well bore fluids containing the same |
| 05/29/1996 | EP0713504A1 Reaction products from olefinically unsaturated carboxylic acids and polyetherols and their use as demulsifying agents for crude oil emulsions |
| 05/29/1996 | CN1123253A Method of inhibiting corrosion in aqueous systems using poly(amino acids) |
| 05/28/1996 | US5520251 Preventing iron precipitation by injecting acidified surfactant solution to form protective film on tubing surface before injecting acidifying solution |
| 05/28/1996 | US5520250 Affixing crosslinking agent to proppant particles, placing particles in fracturing fluid, conveying to formation |
| 05/22/1996 | EP0712816A1 Set retarded downhole cement composition |
| 05/22/1996 | EP0712330A1 Concentrated aqueous compositions of alkylpolyglycosides, and applications thereof |
| 05/22/1996 | CN1122820A Non toxic, biodegradable well fluids |
| 05/21/1996 | US5518996 Fluids for oilfield use having high-solids content |
| 05/15/1996 | EP0711902A2 Nitrogen/Carbon Dioxide combination fracture treatment |
| 05/15/1996 | CN1122613A Process for the preparation of immunogens or diagnostic reagents, and immunogens or diagnostic reagents thereby obtainable |
| 05/14/1996 | US5515924 Technique for restoring or increasing flow to oil and gas wells |
| 05/14/1996 | US5515923 Oil and gas well productivity |
| 05/14/1996 | US5515921 Method for cementing a directional well |
| 05/14/1996 | US5515919 Enhanced oil recovery process including the simultaneous injection of a miscible gas and water |
| 05/07/1996 | US5514791 Biosynthesis, mutants, viscosifiers of water |
| 05/07/1996 | US5514645 Method of gelling hydrocarbons and fracturing subterranean formations |
| 05/07/1996 | US5514644 Drilling well fluid, magnesium oxide and thiosulfate |
| 05/07/1996 | US5513712 Polymer enhanced foam drilling fluid |
| 05/07/1996 | US5513707 Injecting solutions of alkali or alkaline earth hypohalites, into oil wells, retaining for oxidation reation, then removal, for enhanced oil recovery |
| 05/07/1996 | US5513705 Enhanced oil recovery |
| 05/02/1996 | WO1996012867A1 Inhibition of sulfate-reducing bacteria via nitrite production |
| 05/01/1996 | EP0709544A2 Method and apparatus for pressure coring with non-invading gel |
| 05/01/1996 | EP0709406A1 Process for polymerization of carboxylic acid polymers and copolymers |
| 05/01/1996 | EP0708746A1 Graft polymers of keto-aldehyde condensation or co-condensation products |
| 05/01/1996 | CN1121518A Condensation system based on thickener which is dispersable and thickenable after being dilvted with aqueous medium |
| 04/30/1996 | US5512096 Water swellable clay, gelling agent; for sealing bore holes |
| 04/26/1996 | CA2160277A1 Method and apparatus for pressure coring with non-invading gel |
| 04/24/1996 | EP0505441B1 Method of supporting fractures in geological formations and hydraulic fluid composition for same |
| 04/23/1996 | US5510436 Water-soluble copolymers useful in drilling fluids |
| 04/23/1996 | US5510038 Adding liquid conditioning agent at high point of seepage pipe |
| 04/23/1996 | CA2088581C Completion and workover fluid for oil and gas wells |
| 04/18/1996 | WO1996011230A1 Alginate gels |
| 04/18/1996 | WO1996011174A1 Well fluids based on low viscosity synthetic hydrocarbons |
| 04/17/1996 | EP0707134A1 Method of oil recovery |
| 04/17/1996 | EP0707055A1 Hydrocarbon base cementitious drilling fluid |
| 04/17/1996 | EP0706974A2 Control of oilfield biofouling |
| 04/17/1996 | EP0706759A2 Control of oilfield biofouling |
| 04/17/1996 | EP0688393A4 Method for isolating a wellbore formation zone |
| 04/17/1996 | EP0668961A4 A method for the inhibition of scale deposition and composition therefor. |
| 04/16/1996 | US5508258 Use of surface-active alpha-sulfo-fatty acid di-salts in water and oil based drilling fluids and other drill-hole treatment agents |
| 04/16/1996 | US5507342 Method of selective treatment of open hole intervals in vertical and deviated wellbores |
| 04/13/1996 | CA2160305A1 Control of oilfield biofouling |
| 04/10/1996 | EP0705892A2 Dispersion of solid particles in water |
| 04/10/1996 | EP0705850A1 Chemically crosslinked polyvinyl alcohol (PVA), process for synthesizing same and its applications as a fluid loss control agent in oil fluids |
| 04/10/1996 | EP0705242A1 Surfactant, process for its production and use |