| 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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| 11/08/1988 | CA1244575A1 Thermally stable thickener |
| 11/08/1988 | CA1244236A1 Liquid polymer containing compositions for thickening aqueous mediums |
| 11/02/1988 | CN88101418A Fluid loss additives for well cementing compositions |
| 11/02/1988 | CN88100379A Method for treating subterranean formations |
| 11/01/1988 | US4782120 Rheology stabilizer |
| 11/01/1988 | US4781845 Hydrocarbon gellant |
| 11/01/1988 | US4781840 Cationic and anionic lignin amines as flocculants |
| 11/01/1988 | US4781251 Recovering hydrocarbons with water soluble alkylphenol lignin surfactants |
| 11/01/1988 | CA1244188A1 Acrylic-methylene succinic ester emulsion copolymers for thickening aqueous systems |
| 10/26/1988 | EP0288320A2 Process for removing soluble compounds of tin from esters of mono- or poly-carboxylic acids |
| 10/26/1988 | EP0287576A1 Method to control and produce novel biopolymers |
| 10/25/1988 | US4780517 Terpolymer of acrylamide, acrylic acid salt and ionic surfactant containing hydrophobic group and ionic polar group |
| 10/25/1988 | US4780223 Stabilized fracture fluid and crosslinker therefor |
| 10/25/1988 | US4780221 N,n-dimethylacrylamide-dimethylaminopropyl methacrylamide copolymer, monocarboxylic acid and ethanol amines; enhanced oil recovery |
| 10/25/1988 | US4780220 (poly)glycerine |
| 10/25/1988 | US4779680 Hydraulic fracturing process using a polymer gel |
| 10/25/1988 | US4779679 Sustained release of corrosion inhibitor by complexing with ion exchange resin |
| 10/25/1988 | CA1243481A1 Cement slurry compositions for cementing oil wells, adapted to control free water and corresponding cementing process |
| 10/20/1988 | DE3711950A1 Additive for drilling fluids, process for its preparation, and its use |
| 10/18/1988 | US4778608 Aqueous suspensiion of high- and low-yield bentonites and leonhardite |
| 10/18/1988 | US4778607 Method of diluting a concentrated polymer solution for use in a hydrocarbon recovery process |
| 10/18/1988 | US4778528 Cement slurry compositions for cementing oil wells, adapted to control free water and corresponding cementing process |
| 10/18/1988 | US4778006 Process for removing carbonate from wells |
| 10/12/1988 | EP0286336A1 Corrosion inhibitors |
| 10/12/1988 | EP0285608A1 Water-in-oil emulsions. |
| 10/11/1988 | US4777200 Polymeric compositions and methods of using them |
| 10/11/1988 | US4776966 Drilling fluids |
| 10/11/1988 | US4776398 Oil reservoir permeability control |
| 10/11/1988 | CA1242872A1 Well drilling and production fluids employing parenchymal cell cellulose |
| 10/11/1988 | CA1242871A1 Process and agents for controlling the swelling of clays in the presence of sea-water and clay-based muds |
| 10/04/1988 | US4775744 Cationic and anionic lignin amines |
| 10/04/1988 | US4775489 Separation into liquid phases; removal from well |
| 10/04/1988 | US4775010 Methods and compositions for acid treating subterranean formations |
| 10/04/1988 | CA1242826A1 Process for thickening with copolymers of alkyl poly(oxyalkylene) itaconates |
| 10/04/1988 | CA1242574A1 Process for preparing an alkyl aryl sulphonate concentrate composition |
| 09/28/1988 | EP0284366A2 Drying of microbial polysaccharides |
| 09/28/1988 | EP0283602A1 Polysilicate esters for oil reservoir permeability control |
| 09/27/1988 | US4773484 Enhanced oil recovery process with reduced gas drive mobility |
| 09/27/1988 | US4773483 Method for selectively plugging subterranean formations with polysulfides |
| 09/27/1988 | US4773482 Reducing permeability of highly permeable zones in oil and gas formations |
| 09/27/1988 | US4773481 Reducing permeability of highly permeable zones in underground formations |
| 09/27/1988 | US4773480 Method for selectively plugging deep subterranean formations with polysulfides |
| 09/21/1988 | EP0283344A1 Process for the selective reduction of water present in oil or gas producing wells |
| 09/20/1988 | US4772641 Aqueous sulfomethylated melamine gel-forming compositions |
| 09/20/1988 | CA1242071A1 Process and composition for cementing wells passing through salt formations |
| 09/14/1988 | EP0282253A2 Cross-linking titanium & zirconium chelates & their use |
| 09/14/1988 | CN87105977A Method for treatmenting underground structural layer with coiler selectively |
| 09/13/1988 | US4770796 Enhanced oil recovery |
| 09/13/1988 | US4770795 Calcium tolerant deflocculant for drilling fluids |
| 09/13/1988 | US4770245 Rate-controlled polymer gelation process for oil recovery applications |
| 09/13/1988 | CA1241830A1 Method for fracturing subterranean formations |
| 09/13/1988 | CA1241829A1 Method of gravel packing a well |
| 09/13/1988 | CA1241828A1 Shear thickening composition with polyacrylic acid |
| 09/13/1988 | CA1241827A1 Dispersant and fluid loss additives for oil field cements |
| 09/13/1988 | CA1241826A1 Fracturing method for stimulation of wells utilizing carbon dioxide based fluids |
| 09/07/1988 | EP0281430A1 Process for sweeping oil formations with a gas using foams based on surfactants containing perfluoro groups |
| 09/07/1988 | EP0281360A1 Hydrophobically modified non-ionic polygalactomannan ethers |
| 09/07/1988 | EP0281131A2 Blends of water soluble polymers |
| 09/07/1988 | CN88100516A Process for delaying gelatification of water-solubility polymer |
| 09/06/1988 | USRE32742 Method of producing light weight cement for use of cementation of oil and gas wells |
| 09/06/1988 | US4769161 Silicate-containing oil recovery compositions |
| 09/06/1988 | US4769078 Organophilic clay modified with betaine type compounds |
| 09/06/1988 | US4768593 Method for primary cementing a well using a drilling mud composition which may be converted to cement upon irradiation |
| 08/31/1988 | EP0280341A1 Fracturing fluid slurry concentrate and method of use |
| 08/31/1988 | EP0280083A1 Delaying the gelation of water soluble polymers |
| 08/30/1988 | US4767550 Quaternary ammonium acrylates, acrylates, acrylamides, metal salt crosslinking agents, water soluble |
| 08/30/1988 | US4767549 Alkoxylated fatty amine or quaternary ammonium salt, for plugging voids and fractures in rock |
| 08/30/1988 | US4767460 Cement compositions for cementing of wells enabling gas channelling in the cemented annulus to be inhibited by right-angle setting |
| 08/30/1988 | US4766959 Crosslinging a water soluble polygalactomannans with alkoxy amine ester of boric acid |
| 08/24/1988 | EP0279686A1 Alkoxylated alkyl substituted phenol sulfonates compounds and compositions, the preparation thereof and their use in various applications |
| 08/23/1988 | US4765415 For increasing the drilling rate and drilling kife of a drill bit |
| 08/23/1988 | US4765410 Method and apparatus for cleaning wells |
| 08/23/1988 | US4765408 Micellar slug for oil recovery |
| 08/23/1988 | CA1241150A1 Acrylamide polymerization |
| 08/23/1988 | CA1241029A1 Set delayed cement compositions and method of using the same |
| 08/17/1988 | EP0278684A1 Zirconium chelates and their use for cross-linking |
| 08/17/1988 | EP0278543A1 Process and composition for inhibiting high-temperature iron and steel corrosion |
| 08/17/1988 | EP0278540A2 Composition and method for fluid loss control in acid fracturing of earthen formations |
| 08/16/1988 | US4764307 Alkoxyethane halide and potassium or ammonium sulfite reacted in a reduced amount of water |
| 08/16/1988 | US4764218 Process for the preparation of micro inorganic foamed granules |
| 08/16/1988 | US4763730 Miscible gas enhanced oil recovery method using oil-brine compatible pre-formed foam |
| 08/16/1988 | US4763729 Oxy-salts of group iv b or v refractory metals improve protective coatings; oil wells |
| 08/11/1988 | WO1988005857A1 Preventing plugging by insoluble salts in a hydrocarbon-bearing formation and associated production wells |
| 08/09/1988 | US4762627 Corrosion inhibitors |
| 08/09/1988 | US4762626 Hydroxyethylacrylate/acrylate copolymers as zinc sulfide scale inhibitors |
| 08/09/1988 | US4762625 Viscosifiers for brines utilizing hydrophilic polymer-mineral oil systems |
| 08/09/1988 | CA1240317A1 High temperature drilling fluid component |
| 08/03/1988 | EP0276879A1 Process and composition for inhibiting iron and steel corrosion |
| 08/03/1988 | EP0276718A2 Thermally stable polymers |
| 08/02/1988 | US4761099 Injecting polyurethane forming mixture |
| 08/02/1988 | US4760882 Crosslinking polymer |
| 08/02/1988 | CA1239921A1 Composition for and method of altering the permeability of a subterranean formation |
| 07/29/1988 | EP0239568A4 Hydraulic fracturing process and compositions. |
| 07/27/1988 | EP0275651A1 Carbon dioxide corrosion inhibiting composition and method of use thereof |
| 07/27/1988 | EP0275646A1 Carbon dioxide corrosion inhibiting composition and method of use thereof |
| 07/27/1988 | EP0275624A1 Encapsulated breaker for crosslinked acid gel, fracture acidizing fluid containing same and method of use thereof |
| 07/27/1988 | EP0275304A1 Calcium-free clear high density fluids. |
| 07/27/1988 | CN86100694B Polyvalence chelate chromium salt of propionic acid with no sulphate for improving permeability and contrast |
| 07/26/1988 | US4759908 Water dipersible solution of amine or fatty ester solvent and polythioether |
| 07/26/1988 | US4759853 Polyacrylonitriles with a low K value, a process for their preparation and their suitable use |