| 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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| 05/08/1991 | EP0425873A2 Use of high hydrocarbon containing gels as fracturation fluid |
| 05/08/1991 | EP0425648A1 Polymeric compositions |
| 05/08/1991 | EP0425521A1 Process for inserting gel in a well. |
| 05/07/1991 | US5013654 Production of emulsifying agents and surfactants |
| 05/07/1991 | US5013462 Oil in water emulsion, surfactant blend |
| 05/07/1991 | US5013451 Methods for treating hydrocarbon recovery operations and industrial waters |
| 05/07/1991 | US5012870 Hydraulic cement |
| 05/07/1991 | US5012869 Water soluble polymer and basic salt to form skin |
| 05/07/1991 | CA1283848C Process for plugging subterranean formations, notably in the domain of oil field services and corresponding applications |
| 05/04/1991 | CA2029238A1 Programmed gelation of polymers using melamine resins |
| 05/02/1991 | WO1991005832A1 Wellbore fluid |
| 05/01/1991 | CA2028737A1 Method for setting well casing using a resin coated particulate |
| 04/30/1991 | US5010954 Using mixture of carboxylated polymer crosslinked with chromic carboxylate; ethylenediaminetrtraacetic acid as gel breaker |
| 04/30/1991 | US5010953 Injecting polymerizable compound, diluent, catalyst, swelling polymer to form permeable barrier around oil well bore |
| 04/30/1991 | CA1283530C Fracturing fluid slurry concentrate and method of use |
| 04/29/1991 | CA2028680A1 Hydrocarbon-rich gels as fracturing fluids |
| 04/27/1991 | CA2028509A1 Method for using foams to improve alkaline flooding oil recovery |
| 04/24/1991 | CN1012430B Process for the preparation of micro in organic foamed granules |
| 04/23/1991 | US5010186 Acid/heat modified polysaccharide biopolymers |
| 04/23/1991 | US5010124 Flowability improving agent, process for the production thereof and use thereof |
| 04/23/1991 | US5009799 Inorganic acid solution viscosifier and corrosion inhibitor and method |
| 04/23/1991 | US5009798 Low fluid loss heavy brines containing hydroxyethyl cellulose |
| 04/23/1991 | US5009797 Method of supporting fractures in geologic formations and hydraulic fluid composition for same |
| 04/23/1991 | US5009269 Well cement fluid loss additive and method |
| 04/23/1991 | US5009268 Enhanced oil recovery |
| 04/23/1991 | US5009267 Using starch blends |
| 04/23/1991 | CA1283406C Modified lignosulfonate drilling fluid dispersants and process for thepreparation thereof |
| 04/16/1991 | US5008026 Well treatment compositions and method |
| 04/16/1991 | US5008025 Sulfonate-containing polymer/polyanionic cellulose combination for high temperature/high pressure filtration control in water base drilling fluids |
| 04/16/1991 | US5008019 Displacing with aqueous alkaline polymer solution |
| 04/16/1991 | US5007489 Drilling fluid methods and composition |
| 04/16/1991 | US5007481 Method of treating subterranean formations using a non-damaging fracturing fluid |
| 04/16/1991 | US5007480 High density, high strength |
| 04/16/1991 | CA1283040C Continuous process for hydraulic fracturing with foam |
| 04/16/1991 | CA1282949C Colloidal silica-based fluid diversion |
| 04/12/1991 | CA2026482A1 Foam injected into a gravity override zone for improved hydrocarbon production |
| 04/10/1991 | EP0421611A1 Method for selective plugging of a zone in a well |
| 04/10/1991 | EP0421068A1 Method for removing water-retensive liquids from a subterranean hollow space |
| 04/09/1991 | US5006584 Polydialkylsilalkylene polymer useful in enhanced oil recovery using carbon dioxide flooding |
| 04/09/1991 | US5006177 Sodium silicate, sodium chloride with lignosulfonate and borax or citric acid to control setting |
| 04/09/1991 | US5005648 Treating underground formations |
| 04/09/1991 | US5005647 Treating underground formations |
| 04/09/1991 | US5005646 Well completion using formate ester |
| 04/09/1991 | US5005644 Steam enhanced oil recovery method using branched alkyl aromatic sulfonates |
| 04/09/1991 | CA1282685C Preventing plugging by insoluble salts in a hydrocarbon-bearingformation and associated production wells |
| 04/09/1991 | CA1282667C Process for retarding and controlling the formation of gels or precipitates derived from aluminum and corresponding compositions, plus the corresponding applications - in particular regarding oil wells |
| 04/09/1991 | CA1282582C Rate-controlled polymer gelation process for oil recovery applications |
| 04/09/1991 | CA1282581C Polymer gelation process for oil recovery applications |
| 04/03/1991 | EP0420710A2 Inverse emulsions prepared by using emulsifiers and use of said emulsions in drilling holes |
| 04/03/1991 | EP0419954A1 Process for the preparation of low-temperature stable alcoholic-aqueous solutions of polyethersulfonates |
| 04/02/1991 | US5004553 Well working compositions, method of decreasing the seepage loss from such compositions, and additive therefor |
| 04/02/1991 | CA1282526C Gel and method for reducing steam channeling |
| 03/27/1991 | EP0418374A1 Sulfate scale dissolution. |
| 03/27/1991 | CN1012190B Wellbore cementing process using polymer gel |
| 03/27/1991 | CN1012189B Well completion process using polymer gel |
| 03/26/1991 | US5003060 Readily dispersed/dissolved porous biopolymer granules |
| 03/26/1991 | US5003006 Oil reservoir permeability control |
| 03/26/1991 | US5002673 Corrosion inhibitor and method of use |
| 03/26/1991 | US5002672 Glycerophosphoric Ester, Polyacyloxy Polycarboxylate of glycerides or diglycerides |
| 03/26/1991 | US5002431 Method of forming a horizontal contamination barrier |
| 03/26/1991 | US5002128 Desiccant delivered to an oil or gas well, an anhydrous acid agent that reacts with rocks to increase permeability |
| 03/26/1991 | US5002127 Placement aid for dual injection placement techniques |
| 03/26/1991 | US5002126 Phosphonates and polymeric carboxylates react with surfactant metal salt to form metal deposit inhibitors |
| 03/26/1991 | CA1281895C Organic compounds |
| 03/20/1991 | CN1012091B Steam enhanced oil recovery method using branched alkyl aromatic sulforates |
| 03/19/1991 | US5001232 Carboxymethylsulphoethyl celluloses and a process for their preparation |
| 03/19/1991 | US5001231 Invert emulsion polysaccharide slurry |
| 03/19/1991 | US5000918 Method of disinfecting petroleum and petroleum products |
| 03/19/1991 | US5000263 Method for improving the steam splits in a multiple steam injection process using multiple steam headers |
| 03/19/1991 | US5000262 Viscosity control additives for foaming mixtures |
| 03/13/1991 | EP0416969A1 New water-in-oil emulsions and their use for removing hydrogen sulfide |
| 03/13/1991 | EP0415993A1 Xanthan concentrate, process of preparing thereof and use thereof by increased recovery of oil from subterranean formations. |
| 03/12/1991 | CA1281175C Potassic drilling mud |
| 03/12/1991 | CA1281174C Cross-linking titanium and zirconium chelates and their use |
| 03/07/1991 | WO1991001430A3 Lost circulation fluid for oil field drilling operations |
| 03/07/1991 | DE3929071A1 Universalschmiermittel auf der basis einer syntheseoelloesung Universal lubricant based on an syntheseoelloesung |
| 03/06/1991 | EP0415556A2 Water soluble 1,2-dithio-3-thiones |
| 03/06/1991 | CA2024028A1 Water-in-oil emulsions and their use in the elimination of hydrogen sulphide |
| 03/05/1991 | US4997912 Corrosion inhibitor |
| 03/05/1991 | US4997582 Compositions for acid treating subterranean formations |
| 03/05/1991 | US4997581 Additive and method for temporarily reducing permeability of subterranean formations |
| 03/05/1991 | US4997487 Pumpable slurry |
| 03/05/1991 | US4997313 Leaching |
| 03/05/1991 | US4997040 Corrosion inhibition using mercury intensifiers |
| 03/05/1991 | CA1280885C Composition and method of stimulating subterranean formations |
| 03/05/1991 | CA1280884C Compositions for increasing hydrocarbon production from subterranean formations |
| 03/02/1991 | WO1991003534A1 Universal lubricant based on a solution of synthetic oil |
| 03/02/1991 | CA2066447A1 Universal lubricant based on a synthetic oil solution |
| 02/27/1991 | EP0414549A2 Liquid cleaning compositions and suspending media |
| 02/27/1991 | EP0413783A1 Thickening agents for aqueous systems |
| 02/26/1991 | US4996336 Cross-linking titanum & zirconium; chelates & Their use |
| 02/26/1991 | US4995463 Conversion of hydrophobic coal fines to hydrophilic by injecting wetting agent and dispersant |
| 02/26/1991 | US4995461 Using a crosslinked polymer |
| 02/26/1991 | CA1280688C Well completion process using a polymer gel |
| 02/26/1991 | CA1280589C Composition and method of stimulating subterranean formations |
| 02/26/1991 | CA1280588C High temperature guar based fracturing fluid |
| 02/26/1991 | CA1280587C Spacer fluid |
| 02/26/1991 | CA1280586C Method of reducing fluid loss in cement compositions which may contain substantial salt concentrations |
| 02/26/1991 | CA1280585C Composition and method for reducing sludging during the acidizing of formations containing sludging crude oils |
| 02/21/1991 | WO1991002377A1 Film for wafer processing |