| 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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| 07/27/1999 | US5927404 Solids-stabilized emulsion having water, oil, and undissolved solids, |
| 07/22/1999 | WO1999036668A1 Well treatment |
| 07/22/1999 | WO1999036667A1 Well treatment with microorganisms |
| 07/22/1999 | WO1999036666A1 Composition and method for preparing water-in-oil emulsions used in crude-oil extraction |
| 07/22/1999 | WO1999036487A1 Fluid and method for releasing tubular elements stuck in a well |
| 07/22/1999 | WO1999036376A1 Anionic surfactants based on alkene sulfonic acid |
| 07/22/1999 | CA2318341A1 Fluid and method for releasing tubular elements stuck in a well |
| 07/22/1999 | CA2285255A1 Composition and preparation method for water-in-oil emulstions for oil production |
| 07/21/1999 | EP0929619A1 Invert emulsion fluids suitable for drilling |
| 07/20/1999 | US5925598 Water-based drilling fluid for use in shale formations |
| 07/20/1999 | US5925233 Use of alkanesulfonic acids as asphaltene-dispersing agents |
| 07/20/1999 | CA2062894C Corrosion inhibitor and method of use |
| 07/15/1999 | WO1999035213A1 Water soluble invert emulsions |
| 07/15/1999 | WO1999035212A1 Water soluble invert emulsions |
| 07/15/1999 | WO1999035211A1 Conductive medium for openhole logging and logging while drilling |
| 07/14/1999 | EP0928362A1 Blocking composition for use in subterranean formation |
| 07/14/1999 | EP0824631B1 Method for inhibiting the plugging of conduits by gas hydrates |
| 07/13/1999 | US5922653 Compositions and processes for treating subterranean formations |
| 07/13/1999 | US5922652 Microencapsulated oil field chemicals |
| 07/13/1999 | US5922559 Biological systems particularly suitable for this invention are bioremediation, biologically enhanced oil recovery, biological leaching of metals, and agricultural bioprocesses. |
| 07/13/1999 | US5921319 Methods of terminating water flow in a subterranean formation |
| 07/13/1999 | CA2118819C Polyglycerol esters as functional fluids and functional fluid modifiers |
| 07/08/1999 | WO1999034092A1 Apparatus and method for injecting treatment fluids into an underground formation |
| 07/08/1999 | WO1999033932A1 Invert emulsion drilling fluid containing mixtures of secondary esters obtained by conversion of olefins, and preparation thereof |
| 07/08/1999 | WO1999033763A1 Controlling setting in a high-alumina cement |
| 07/07/1999 | EP0927236A1 Filtrate reducing additive and well fluid |
| 07/07/1999 | CN1221849A Chemically induced stimulation of cleat formation in subterranean coal formation |
| 07/06/1999 | US5919739 Xanthanes, alginates or scleroglucanes, crosslinking agent selected from calcium hydroxide, calcium sulfate, an aldehyde and aluminum sulfate. |
| 07/06/1999 | US5919738 Fluids for use in drilling and completion operations comprising water insoluble colloidal complexes for improved rheology and filtration control |
| 07/01/1999 | WO1999032573A1 Thermoviscosifying water based fluids; their synthesis and use in drilling fluids |
| 07/01/1999 | WO1999032572A1 A method for controlling the rheology of an aqueous fluid and gelling agent therefor |
| 06/30/1999 | EP0926310A1 Apparatus and method for injecting treatment fluids into an underground formation |
| 06/30/1999 | EP0817605A4 Compositions based on apg and at least one additional nonionic sugar cosurfactant |
| 06/30/1999 | CN1221445A Clay-free biodegradable wellbore fluid and method for using said fluid |
| 06/29/1999 | US5916933 Proppants comprising a particle coated with a composition comprising bisphenol-aldehyde novolak resin, a bisphenol homopolymer or mixtures; coated foundry sands |
| 06/29/1999 | US5916849 Polysaccharide-containing well drilling and servicing fluids |
| 06/29/1999 | US5916484 Metal corrosion inhibited organic acid compositions |
| 06/24/1999 | WO1999031353A1 Stabilizing clayey formations |
| 06/24/1999 | WO1999031200A1 A method of improving the flow properties of a crude oil or natural gas liquid |
| 06/24/1999 | WO1999031196A1 Chain entanglement crosslinked polymers and related methods |
| 06/24/1999 | WO1999031155A1 Method for grafting lignin, polymerizates produced according to the method and the utilization thereof |
| 06/24/1999 | DE19756172A1 Verfahren zur Pfropfung von Lignin, danach hergestellte Polymerisate und deren Verwendung A method for grafting of lignin, then polymers prepared and their use |
| 06/24/1999 | CA2330117A1 Method for grafting lignin, polymerizates produced according to the method and the utilization thereof |
| 06/23/1999 | EP0923506A2 Method for producing sulfate cement or sulfate cement aggregates |
| 06/22/1999 | US5913364 Methods of sealing subterranean zones |
| 06/17/1999 | WO1999029408A1 Surfactant compositions for wellbore operations, method of forming same and methods of using same |
| 06/16/1999 | EP0922834A2 Method and composition for sealing a subterranean zone |
| 06/16/1999 | EP0922743A1 Oil-based drilling muds with increased viscosity |
| 06/16/1999 | EP0922079A1 Well servicing fluids |
| 06/16/1999 | EP0922078A1 An additive for increasing the density of a fluid and fluid comprising such additive |
| 06/16/1999 | EP0922013A1 Cementing compositions and application thereof to cementing oil or analogous wells |
| 06/15/1999 | US5911282 Well drilling fluids containing epoxy sealants and methods |
| 06/15/1999 | US5911276 Use of unmodified kraft lignin, an amine and a water-soluble sulfonate composition in enhanced oil recovery |
| 06/09/1999 | EP0921171A1 Glycol solution drilling system |
| 06/09/1999 | EP0920484A1 Improved oil-based drilling fluid |
| 06/09/1999 | CN1219193A Biodegradable synthetic ester base stock formed from branched oxo acids |
| 06/08/1999 | US5910467 Solids-stabilized emulsion |
| 06/08/1999 | US5909779 Oil-based drilling fluids suitable for drilling in the presence of acidic gases |
| 06/08/1999 | US5909774 Synthetic oil-water emulsion drill-in fluid cleanup methods |
| 06/03/1999 | WO1999027229A1 Formation treatment method using deformable particles |
| 06/03/1999 | WO1999027032A1 Improved weight material for drilling fluids and method of creating and maintaining the desired weight |
| 06/03/1999 | WO1999026991A1 Cementation auxiliary agent |
| 06/02/1999 | EP0919695A2 Encapsulated breaker for oil gel system |
| 06/01/1999 | US5908814 Reaction product of tertiary amine and alkyl halide |
| 05/27/1999 | WO1999025787A1 An improved drilling fluid system and related methods |
| 05/26/1999 | EP0817819A4 Hydrocarbon gels useful in formation fracturing |
| 05/26/1999 | CA2254381A1 Methods and compositions for sealing subterranean zones |
| 05/25/1999 | US5906966 Sulfonation of partially unsaturated olefin polymer dissolved in oil, then mixing with drilling mud |
| 05/20/1999 | WO1999024693A1 Viscoelastic surfactant fracturing fluids and a method for fracturing subterranean formations |
| 05/20/1999 | CA2309460A1 Viscoelastic surfactant fracturing fluids and a method for fracturing subterranean formations |
| 05/19/1999 | EP0916806A2 Method of treating subterranean formation |
| 05/18/1999 | US5905100 Enhanced oil recovery and aminobenzoic acid crosslinking agents |
| 05/18/1999 | US5905061 Protonated amine salt, oleaginous and non-oleaginous liquids; deprotonation to oil in water emulsion |
| 05/18/1999 | US5904208 Displacing drilling fluid with spacer fluid of water, pumping second spacer fluid under turbulent conditions, pumping third spacer fluid that is aqueous surfactant solution; superior bonding of cement to surfaces |
| 05/14/1999 | WO1999023188A1 Novel carboxylate-based well bore treatment fluids |
| 05/14/1999 | WO1999023046A1 Slag for cementing a well, in particular an oil well |
| 05/12/1999 | EP0914407A1 Method of inhibiting gas hydrate formation |
| 05/12/1999 | EP0914400A1 Drilling method and system using foam - foaming composition |
| 05/12/1999 | CN1216337A Chemically induced stimulations of subterranean carbonaceous formations with gaseous oxidants |
| 05/12/1999 | CN1043372C Composition and method using for reducing permeability in high temperature underground structure |
| 05/11/1999 | US5902775 Oil and gas well operation fluid used for the solvation of waxes and asphaltenes, and method of use thereof |
| 05/11/1999 | US5902515 Solutions and methods for inhibiting corrosion |
| 05/11/1999 | CA2137410C Fluid loss control additives |
| 05/06/1999 | WO1999021933A1 Drilling and cementing through shallow waterflows |
| 05/06/1999 | EP0913384A2 New water soluble C22 tricarboxylic acid amine salts and their use as a water soluble corrosion inhibitors |
| 05/06/1999 | EP0912815A1 Use of oil and gas field chemicals |
| 05/06/1999 | EP0912653A1 Fluid comprising cellulose nanofibrils and its use for oil mining |
| 05/06/1999 | EP0912651A1 Clay-free biodegradable wellbore fluid and method for using said fluid |
| 05/06/1999 | EP0912634A1 Additivation of essentially amorphous cellulose nanofibrils with carboxyl cellulose with a high degree of substitution |
| 05/06/1999 | EP0912633A1 Additivation of cellulose nanofibrils with carboxyl cellulose with low degree of substitution |
| 05/06/1999 | EP0912490A1 Esters, ethers, and compositions comprising them |
| 05/04/1999 | US5900516 Petroleum. water soluble polymer in combination with an anchor group and a guest group. the anchor group should be a hydrophilic moiety with between one and four hydrogen bonding atoms. the guest group should be either a hydrophobic or |
| 05/04/1999 | US5900053 Light weight high temperature well cement compositions and methods |
| 05/04/1999 | US5899272 Fracture treatment system for wells |
| 05/04/1999 | CA2049037C Aqueous resin preparations and a process for stabilizing rock and plugging cavities |
| 04/28/1999 | EP0631605B1 Foaming composition and process for well treatment |
| 04/27/1999 | US5897699 A stable hardening mixture comprising an alpha-olefinic sulfonate surfactant and a betaine surfactant to prevent freezing and depress the pour point |
| 04/21/1999 | EP0909873A2 A process for the thermo-hydraulic control of gas hydrates |
| 04/21/1999 | EP0909871A1 Method for treating water-containing natural gas wells and gas storage wells |
| 04/21/1999 | CN1214756A Method and sytsem for monitoring characteristic of earth formation in well |