| 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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| 07/20/1988 | EP0274523A1 Organophilic polyphenolic acid adducts. |
| 07/20/1988 | CN87107396A Wellbore cementing process using polymer gel |
| 07/20/1988 | CN87101271A Improving of permeability contrast by use of sulfate radical-free polyvalent chelate chromium propionate (iii) |
| 07/19/1988 | US4758357 Mixture of hydroxyethylcellulose, 2-pyrrolidone and monoalkyl ether of ethylene glycol |
| 07/19/1988 | US4758356 Process for preparing Xanthomonas heteropolysaccharides |
| 07/19/1988 | US4757862 Shale stabilizer and method of use thereof |
| 07/19/1988 | US4757833 Method for improving production of viscous crude oil |
| 07/14/1988 | EP0225873A4 Crosslinked fracturing fluids. |
| 07/13/1988 | EP0274143A2 Process for stimulation of an underground hydrocarbon formation by acidizing |
| 07/13/1988 | EP0274139A1 Process for selectively treating a subterranean formation using coiled tubing without affecting or being affected by the two adjacent zones |
| 07/13/1988 | CN87107394A Well completion process using polymer gel |
| 07/13/1988 | CN87106624A Copolymer of low-molecular weight acrylate acrylamide and process for salt deposit of at least bufen part prevent aqueous medium produce |
| 07/12/1988 | US4756888 Recovery of silver-containing scales from aqueous media |
| 07/12/1988 | US4756836 Downhole hydrogen sulfide scavenging in drilling mud using iron chelates |
| 07/12/1988 | US4756370 Lignin amine surfactant system followed by sequential polymer slugs |
| 07/12/1988 | US4756368 Method for drawing up special crude oil |
| 07/12/1988 | CA1239014A1 Polymer suspensions |
| 07/06/1988 | EP0273471A1 Aqueous composition for universal spacer and its use in the field of drilling wells notably oil and gas wells |
| 07/06/1988 | EP0273210A2 High temperature profile modification agents and methods for using same |
| 07/05/1988 | USH495 Drilling fluids based on hydrocarbon soluble polyampholytes |
| 07/05/1988 | US4755307 Reacting calcium lignosulfonate with titanium and/or zirconium sulfate to precipitate calcium, filtering, adding additional amount of metal sulfate to filtrate |
| 07/05/1988 | US4755230 Method of and composition for removing paraffin deposits from hydrocarbon transmission conduits |
| 07/05/1988 | US4754810 Method for patching casing leaks |
| 07/05/1988 | US4754809 Degradation of a viscous microbial polysaccharide formulation |
| 07/05/1988 | CA1238784A1 Gas generation retarded aluminum powder for oil field cements |
| 06/30/1988 | WO1988004718A1 Well completion process using a polymer gel |
| 06/30/1988 | WO1988004717A1 Wellbore cementing process using a polymer gel |
| 06/30/1988 | WO1988004680A1 Method for stabilizing clayish formations |
| 06/29/1988 | EP0272709A1 Process for plugging subterranean formations, notably in the domain of oilfield services and corresponding applications |
| 06/29/1988 | EP0272406A2 Process for an enhanced oil recovery from subterranean formations by surfactant flooding |
| 06/29/1988 | EP0272405A2 Process for an oil recovery from subterranean formations by surfactant flooding |
| 06/28/1988 | US4753973 Enhanced oil recovery composition |
| 06/28/1988 | US4753740 Adding ammonium chloride or bromide or borate anion producing compound |
| 06/22/1988 | EP0271943A2 Drilling fluid |
| 06/22/1988 | EP0271784A2 Water soluble polymers containing allyloxybenzenesulfonate monomers |
| 06/21/1988 | US4752580 Process for preparing Xanthomonas heteropolysaccharides |
| 06/21/1988 | US4752404 Blends of water soluble polymers |
| 06/21/1988 | US4752339 Thixotropic aqueous solutions containing a divinylsulfone-crosslinked polygalactomannan gum |
| 06/21/1988 | CA1238437A1 Superplasticizer composition |
| 06/21/1988 | CA1238268A1 Method for improved oil recovery |
| 06/15/1988 | EP0271060A2 Organotitanium compositions useful for cross-linking |
| 06/14/1988 | US4750562 Method to divert fractures induced by high impulse fracturing |
| 06/14/1988 | CA1238125A1 Treatment of the production layer in the vicinity of the well bottom |
| 06/14/1988 | CA1237979A1 Method for treatment and/or workover of injection wells |
| 06/08/1988 | EP0269887A2 Branched quaternary polyoxyalkylene polyesters, process for their preparation and their use |
| 06/08/1988 | EP0269630A1 Process for strengthening geological formations. |
| 06/07/1988 | USH475 Preparing an aqueous alkaline solution for recovery of oil from a reservoir containing hard water |
| 06/07/1988 | US4749498 2-acrylamido-2-methyl-1-propanesulfonic acid-1-vinyl-2-pyrrolidone-acrylamide-acrylonitrile polymer |
| 06/07/1988 | US4749042 Petroleum sulfonate adjuvants in epoxy resin corrosion-inhibiting composition |
| 06/07/1988 | US4749041 Organic zirconium complex and alphahydroxymonocarboxylic acid; ph level specified |
| 06/07/1988 | US4749040 And alpha-hyproxymonocarboxylic acid to give ph of three to five; pumping under pressure |
| 06/01/1988 | CN87106635A Method of depositing polymeric pour point depressant in an oil producing formation |
| 05/31/1988 | US4747728 Method for distributing an aqueous solution containing a peroxygen in clay |
| 05/25/1988 | EP0177509A4 Process for clarifying bicarbonate bearing waters using measurement and control of carbon dioxide content. |
| 05/24/1988 | US4746687 High temperature profile modification agents and methods for using same |
| 05/24/1988 | US4746465 Process for preparing a scaling inhibitor |
| 05/24/1988 | US4745976 Method for selectively plugging the more permeable regions of an underground formation having non-uniform permeability |
| 05/17/1988 | US4745154 Thickeners, flocculants, drilling fluids |
| 05/17/1988 | US4744948 Thiol ester corrosion inhibition system |
| 05/17/1988 | US4744831 Hollow inorganic spheres and methods for making such spheres |
| 05/17/1988 | US4744419 Conformance improvement in a subterranean hydrocarbon-bearing formation using a crosslinked polymer |
| 05/17/1988 | US4744418 Polyvalent metal crosslinking agent |
| 05/11/1988 | EP0266808A1 Process for delaying and controlling the formation of gels or precipitates derived from aluminum and corresponding compositions together with its applications particularly those concerning the operation of oil wells |
| 05/11/1988 | EP0266792A2 Method and mortar composition for reconditioning a water well |
| 05/11/1988 | EP0266342A1 Water-based metal-containing organic phosphate compositions |
| 05/10/1988 | US4743666 Water-soluble copolymers with pendant phosphonic, sulphonic and amide groups |
| 05/10/1988 | US4743633 Gelable solution of lignin and formaldehyde |
| 05/10/1988 | US4743431 Fluidization aid including low bulk density fluidization aid |
| 05/10/1988 | US4743385 Oil recovery agent |
| 05/10/1988 | US4743384 Carboxymethyl guar based drilling fluids |
| 05/10/1988 | US4743383 Organophilic clay, prevention of fluid loss |
| 05/10/1988 | US4743305 Organoclays |
| 05/10/1988 | CA1236608A1 Materials for use in drilling fluids |
| 05/04/1988 | EP0266234A1 Acrylate acryl amide copolymers with a low molecular weight, and process for reducing the deposition of salt in aqueous systems |
| 05/04/1988 | EP0266043A2 Permeability stabilization in subterranean formations containing particulate matter |
| 05/04/1988 | EP0265563A1 Acidizing method |
| 05/04/1988 | CN87106918A Rate-controlled polymer gelation process for oil recovery applications |
| 05/03/1988 | US4742098 Organophilic clay gellants and process for preparation |
| 05/03/1988 | US4742094 Low fluid loss salt saturated cement slurries, additives and methods |
| 05/03/1988 | US4741844 Liquid composition and method of use for producing a foamed stimulation fluid for oil and gas wells |
| 05/03/1988 | US4741843 Fluid loss control additives and drilling fluids containing same |
| 05/03/1988 | US4741401 Injection controlled release capsules containing breaker |
| 05/03/1988 | US4741400 Method for scale inhibition in a well penetrating a subterranean formation |
| 05/03/1988 | US4741399 Oil recovery process utilizing gravitational forces |
| 05/03/1988 | CA1236118A1 Ethoxylated lignite composition and method of preparing |
| 04/27/1988 | EP0264867A1 Styrylaryloxy-ether sulfonates, process for their preparation and their use in petroleum recovery |
| 04/27/1988 | EP0181389B1 Drilling fluid |
| 04/26/1988 | US4740319 Oil base drilling fluid composition |
| 04/26/1988 | US4740318 Well drilling fluids and process for drilling wells |
| 04/26/1988 | US4739834 Controlled hydraulic fracturing via nonaqueous solutions containing low charge density polyampholytes |
| 04/26/1988 | US4739833 Method of acidizing high-temperature subterranean formations |
| 04/26/1988 | US4739832 Method for improving high impulse fracturing |
| 04/26/1988 | US4739831 Using alkylated diphenyl sulfonate surfactant |
| 04/26/1988 | CA1235840A1 Preparing aqueous hydrolyzed polymer solutions for oil recovery applications |
| 04/21/1988 | WO1988002806A1 Rate-controlled polymer gelation process for oil recovery applications |
| 04/19/1988 | US4739041 Degradation and ether-forming on phenolic sites |
| 04/19/1988 | US4739040 Surfactants from lignin |
| 04/19/1988 | US4738897 Polymer article and its use for controlled introduction of reagent into a fluid |
| 04/19/1988 | US4738795 Using water-insoluble polar compounds |
| 04/19/1988 | US4738789 Surfactant solvent composition |