| 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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| 04/20/1999 | US5894888 Horizontal well fracture stimulation methods |
| 04/15/1999 | WO1999018330A1 Foaming composition |
| 04/15/1999 | DE19803384C1 Additive for inhibiting gas hydrates |
| 04/14/1999 | CN1214078A Substantially linear ethylene/alpha-olefin polymers as viscosity index improvers or gelling agents |
| 04/14/1999 | CN1213689A Chemically induced stimulations of subterranean carbonaceous formations with aqueous oxidizing solutions |
| 04/14/1999 | CA2249896A1 Method of thermally insulating a wellbore |
| 04/08/1999 | WO1999016723A1 Multi-functional additive for use in well cementing |
| 04/07/1999 | EP0906946A1 Oil well drilling fluids with improved anti-settling properties and methods of preparing them |
| 04/07/1999 | EP0906489A1 Method and spacer fluid composition for displacing drilling fluid from a wellbore |
| 04/07/1999 | EP0765368B1 Linear alpha-olefin-containing fluid bore-hole treatment agents, in particular corresponding bore-hole flushing agents |
| 04/06/1999 | US5891972 Method of manufacturing water-soluble polymers, polymers manufactured thereby, and uses of said polymers |
| 04/06/1999 | US5891262 Dewaxing fluid comprises solution of nitrogen salts activated by emulsified acetic acid and solvent, which is the petroleum oil being produced |
| 04/06/1999 | CA2166596C Borate-starch compositions for use in oil field and other industrial applications |
| 04/01/1999 | WO1998045218A3 Method for producing sulfate cement or sulfate cement aggregates |
| 04/01/1999 | EP0923506A3 Method for producing sulfate cement or sulfate cement aggregates |
| 04/01/1999 | CA2246205A1 Oil well drilling fluids with improved anti-settling properties and methods of providing anti-settling properties to oil well drilling fluids |
| 03/31/1999 | EP0905350A1 Process for conveying hydrates dispersed in production effluents |
| 03/31/1999 | EP0904338A1 Biodegradable synthetic ester base stocks formed from branched oxo acids |
| 03/31/1999 | CN1042740C Drilling mud containing water and their preparation method and use |
| 03/30/1999 | US5888944 Using acid sensitive surfactant to remove filter cake |
| 03/30/1999 | US5888943 Drilling compositions and methods |
| 03/30/1999 | US5888021 Method and apparatus for remediation of contaminated soil |
| 03/30/1999 | US5887653 Method for clay stabilization |
| 03/25/1999 | WO1999014286A1 Electrically conductive non-aqueous wellbore fluids |
| 03/25/1999 | WO1999014285A1 Electrically conductive non-aqueous wellbore fluids |
| 03/25/1999 | DE19842424A1 Increasing methane production from water-bearing subterranean coal or carbonaceous formation |
| 03/25/1999 | CA2302731A1 Electrically conductive non-aqueous wellbore fluids |
| 03/24/1999 | EP0903461A1 Methods of sealing plugs in well bores |
| 03/24/1999 | EP0903390A1 Drilling fluid concentrates |
| 03/24/1999 | EP0902859A1 Coated products and use thereof in oil fields |
| 03/24/1999 | EP0902821A1 Method of inhibiting reservoir souring by bacteria |
| 03/24/1999 | EP0659207B1 Use of detergent mixtures |
| 03/23/1999 | US5885825 Biochemical transformation of coals |
| 03/23/1999 | CA2082712C Organoclay compositions prepared with a mixture of two organic cations and their use in non-aqueous systems |
| 03/18/1999 | WO1999013197A1 Method and compound for inhibiting the plugging of conduits by gas hydrates |
| 03/17/1999 | EP0902076A2 Electrical well logging fluid and method of using same |
| 03/17/1999 | EP0861120A4 Oil-free, water-soluble, hydroxyethyl cellulose, liquid, polymer dispersion |
| 03/17/1999 | EP0662113B1 Pretreated clays, their preparation and use in formulating drilling muds not aggressive to layer clays |
| 03/17/1999 | CN1211236A High stability and low metals esters based on 3,5,5-trimethyl-1-hexanol |
| 03/16/1999 | US5883210 Gelling composition for oil fields, water soluble polymer, crosslinking agent for drilling fluids |
| 03/16/1999 | US5883054 Thermally stable drilling fluid |
| 03/16/1999 | US5883053 Nitrogen/carbon dioxide combination fracture treatment |
| 03/16/1999 | US5881826 Aphron-containing well drilling and servicing fluids |
| 03/16/1999 | US5881813 Method for improved stimulation treatment |
| 03/10/1999 | EP0900124A1 Water based foaming composition - method for making same |
| 03/10/1999 | EP0680504B1 Method of treating shale and clay in hydrocarbon formation drilling |
| 03/09/1999 | US5880319 Adding to aqueous fluid two different chemical compounds, polymer having organic ring with internal amide linkage and alcohol, to reduce tendency of clathrate hydrates to agglomerate |
| 03/09/1999 | US5880236 Acrylamide copolymerized with 1-15% weight n-dodecylmaleamic acid or n-c8/c18-alkylmaleamic acid; high viscosity even in electrolytic solutions |
| 03/09/1999 | US5879561 Adding quaternary ammonium or phosphonium hydrate formation inhibitor to mixture of hydrocarbons and water flowing through conduit |
| 03/04/1999 | WO1998054432A3 Mud suspension control system |
| 03/03/1999 | EP0899417A1 Method of modifying subterranean strata properties |
| 03/02/1999 | US5877127 Polysaccharides |
| 03/02/1999 | US5875846 Methods of modifying subterranean strata properties |
| 03/02/1999 | US5875845 Methods and compositions for sealing pipe strings in well bores |
| 03/02/1999 | US5875844 Methods of sealing pipe strings in well bores |
| 02/25/1999 | WO1999009110A1 Oil based drilling fluids suitable for drilling in the presence of acidic gases |
| 02/25/1999 | WO1999009109A1 Shale-stabilizing additives |
| 02/25/1999 | CA2300110A1 Shale-stabilizing additives |
| 02/24/1999 | EP0898050A1 Methods and compositions for sealing pipe strings in well bores |
| 02/24/1999 | EP0898049A1 Remedial well bore sealing method |
| 02/24/1999 | EP0897456A2 Multi-lateral wellbore systems and methods for forming same |
| 02/24/1999 | CN1042254C Method for increasing oil prodn. and reducing precipitation of asphalt from crude oil in dill hole |
| 02/23/1999 | US5874660 Introducing into petroleum fluid a copolymer of n-methyl-n-vinylacetamide/n-vinyl caprolactm as a hydrate inhibitor to inhibit gas hydrate formation, conveying the petroleum fluid |
| 02/23/1999 | US5874387 Method and cement-drilling fluid cement composition for cementing a wellbore |
| 02/23/1999 | US5874386 Method for cleaning drilling fluid solids from a wellbore using a surfactant composition |
| 02/23/1999 | US5874385 High viscosity crosslinked gelled alcohol |
| 02/23/1999 | US5873413 Methods of modifying subterranean strata properties |
| 02/23/1999 | CA1340410C Method of inhibiting corrosion using n-s containing compounds |
| 02/18/1999 | WO1999008188A1 A memory controller for detecting a failure of speculation of a component being addressed |
| 02/18/1999 | WO1999007805A1 Base oil for well fluids having low pour point temperature |
| 02/18/1999 | DE19734906A1 Alkoxylation of fatty acid amide(s) and ester(s) with epoxy compounds |
| 02/18/1999 | CA2245211A1 Methods of modifying subterranean strata properties |
| 02/18/1999 | CA2245201A1 Methods of sealing plugs in well bores |
| 02/18/1999 | CA2245033A1 Remedial well bore sealing methods |
| 02/18/1999 | CA2245032A1 Methods and compositions for sealing pipe strings in well bores |
| 02/17/1999 | EP0896650A1 Scale inhibition by squeeze application of a phosphonomethylated polyamine inhibitor |
| 02/17/1999 | CN1042163C Method for reducing petention of displacing agent and application to enhanced hydrocarbon recovery |
| 02/16/1999 | US5871577 Methods of retarding cementitious compositions |
| 02/16/1999 | US5871049 Control of fine particulate flowback in subterranean wells |
| 02/16/1999 | US5871048 Determining an optimum gas injection rate for a gas-lift well |
| 02/11/1999 | DE19733710A1 Facilitating the disposal of flowable and pumpable invert emulsions |
| 02/10/1999 | EP0896123A1 Process to slow down the growth and/or the agglomeration and possibly delaying the formation of hydrates in a production effluent |
| 02/10/1999 | EP0896122A2 Reduction of formation water production upon well stimulation |
| 02/09/1999 | US5869435 Compositions for fracturing subterranean formations |
| 02/09/1999 | US5869434 Free-flowing borehole servicing preparations containing linear α-olefins, more patricularly corresponding drilling fluids |
| 02/09/1999 | US5869433 Non-fluorescing oil-based drilling fluid |
| 02/09/1999 | US5869325 Use of bacteria to break gels used in well treatment fluids |
| 02/09/1999 | US5868210 Method for recovering hydrocarbons from earth formations |
| 02/04/1999 | WO1999005394A1 Methods for deposition of materials in underground reservoirs |
| 02/04/1999 | WO1999005235A1 Fluid loss control additives and subterranean treatment fluids containing the same |
| 02/04/1999 | CA2297767A1 Fluid loss control additives and subterranean treatment fluids containing the same |
| 02/04/1999 | CA2242735A1 Silane or siloxane derivative-based water-soluble copolymer |
| 02/03/1999 | EP0866842A4 Drilling fluid loss prevention and lubrication additive |
| 02/03/1999 | EP0809619B1 Method for inhibiting hydrate formation |
| 02/02/1999 | US5866517 Using water soluble allyl copolymer |
| 02/02/1999 | US5866516 Compositions and methods for solidifying drilling fluids |
| 02/02/1999 | US5865248 Chemically induced permeability enhancement of subterranean coal formation |
| 01/28/1999 | WO1999004138A1 Ether carboxylic acids as asphalt dispersants in crude oils |
| 01/28/1999 | WO1999003948A1 Fluids useful for oil mining comprising de-acetylated xanthane gum and at least one compound increasing the medium ionic strength |
| 01/27/1999 | EP0873379A4 Drilling, completion, and workover fluid comprising ground peanut hulls |