| 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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| 05/02/1997 | EP0770661A1 Lubricant for drilling mud |
| 05/02/1997 | EP0770660A1 Starch additive for drilling fluids |
| 05/02/1997 | EP0770169A1 Hydrate inhibition |
| 05/02/1997 | EP0687278B1 Polymers containing polyacetal blocks, method of producing them and their use |
| 05/02/1997 | EP0559783B1 Method for treating subterranean formations and hydraulic fluid containing capsules for use therein |
| 05/01/1997 | WO1997015746A1 Means and method for the preparation of sealings in oil and gas wells |
| 05/01/1997 | WO1997015638A1 Delayed breaking of gelled hydrocarbon fracturing fluid |
| 05/01/1997 | CA2189215A1 Lightweight well cement compositions and methods |
| 04/30/1997 | CN1148864A Rase oil for well-bore fluids |
| 04/30/1997 | CN1148577A Oil-well cement |
| 04/29/1997 | US5624886 Fracturing a subterranean formation |
| 04/29/1997 | CA2131195C Method of improving oil and gas well productivity |
| 04/29/1997 | CA2108702C Methods and compositions for reducing precipitation from acid solutions |
| 04/22/1997 | US5622921 Alkylaryl sulfonic acid, nonethoxylated glycol, acetylenic alcohol, alkyl alcohol solvent |
| 04/22/1997 | US5622919 Reacting ferric ion in the formation with a thioglycolic acid reducing agent and a alpha-ketone sulfide reacting agent to inhibit formation of ferrous sulfide |
| 04/17/1997 | WO1997013824A1 Method for controlling gas hydrates in fluid mixtures |
| 04/17/1997 | WO1997013578A1 Oil-free, water-soluble, hydroxyethyl cellulose, liquid, polymer dispersion |
| 04/16/1997 | EP0767820A1 Friction modifier for oil-based (invert) well drilling fluids and methods of using the same |
| 04/15/1997 | US5620947 Water-based high temperature well servicing composition and method of using same |
| 04/15/1997 | US5620946 Water in oil emulsions, viscosity; well bore drilling |
| 04/10/1997 | WO1997012947A1 Cleaning compositions for oil and gas wells, lines, casings, formations and equipment and methods of use |
| 04/08/1997 | US5618877 Polymerization a carboxylic acid monomer; crosslinking; in silicone solvent under an inert gas |
| 04/08/1997 | US5618780 Lubricating composition including an ester-use of the composition and well fluid including the composition |
| 04/08/1997 | US5618408 Method for reducing elemental sulfur pick-up by hydrocarbon fluids in a pipeline (law177) |
| 04/08/1997 | US5617920 Controlling the reaction time by adjusting the ph |
| 04/02/1997 | EP0765939A2 Family of xanthan-based polysaccharide polymers including non-acetylated and/or non-pyruvylated gum |
| 04/02/1997 | EP0765429A1 A chemical additive and process for removing solids from a well drilling system |
| 04/02/1997 | EP0765368A1 Linear alpha-olefin-containing fluid bore-hole treatment agents, in particular corresponding bore-hole flushing agents |
| 04/01/1997 | US5616541 Mixture of brines, silica flow control agent and starch |
| 04/01/1997 | CA2002792C Organo-metallic compounds |
| 03/26/1997 | EP0764711A2 Oil based synthetic hydrocarbon drilling fluid |
| 03/26/1997 | EP0764710A1 Silicone oil-based drilling fluids |
| 03/26/1997 | EP0764709A1 Silicone based fluids for drilling applications |
| 03/26/1997 | EP0764061A1 Method for removing alkaline earth metal scale |
| 03/25/1997 | US5614476 Enhanced oil recovery |
| 03/25/1997 | US5614475 Carboxyalkyl substituted polygalactomannan fracturing fluids |
| 03/25/1997 | US5614474 Polymer-surfactant fluids for decontamination of earth formations |
| 03/25/1997 | US5614473 Use of high purity imidazoline based amphoacetate surfactant as foaming agent in oil wells |
| 03/25/1997 | US5614010 Hydrocarbon gels useful in formation fracturing |
| 03/25/1997 | US5613558 Slurrying hydraulic cement, water, retarder, and time-release oxidizer; pumping, hardening, oxidation |
| 03/25/1997 | CA2141111C Method of improving oil and gas well productivity |
| 03/22/1997 | CA2185391A1 Silicone oil-based drilling fluids |
| 03/22/1997 | CA2185390A1 Silicone based fluids for drilling applications |
| 03/20/1997 | WO1997010410A1 Drilling process and device |
| 03/20/1997 | WO1997010313A1 Glycol based drilling fluid |
| 03/20/1997 | CA2205053A1 Drilling process and device |
| 03/18/1997 | US5612294 Base with colloid solids from fermentation of fungus |
| 03/18/1997 | US5612293 Drill-in fluids and drilling methods |
| 03/18/1997 | US5611992 Anaerobic process for oil field corrosion resistance |
| 03/18/1997 | US5611991 Oil field use |
| 03/18/1997 | CA2106778C Method of maintaining subterranean formation permeability and inhibiting clay swelling |
| 03/13/1997 | WO1997009400A1 Use of multi-block copolymers as thermo-thickeners |
| 03/12/1997 | EP0761798A1 Foamable drilling fluid |
| 03/12/1997 | EP0761747A1 Compositions of non-ionic and ionic hydrocolloids and their use as auxiliary agent in tunnel construction |
| 03/12/1997 | EP0668898B1 Method of sealing off water-influx points in rock formations |
| 03/12/1997 | EP0667930B1 Drilling and cementing a well |
| 03/12/1997 | EP0664849B1 Method for drilling and cementing a well |
| 03/12/1997 | EP0664848B1 Method for drilling and cementing a well |
| 03/12/1997 | CN1145088A Application of N,N-dialkylamides to control the formation of emulsions or sludge during drilling or workover of producing oil wells |
| 03/11/1997 | US5610124 Reaction of tin and cerium sulfate with calcium lignosulfonate, drilling fluid additives |
| 03/11/1997 | US5609209 High temperature profile gel for control of oil reservoir permeability |
| 03/11/1997 | US5609208 pH dependent process for retarding the gelation rate of a polymer gel utilized to reduce permeability in or near a subterranean hydrocarbon-bearing formation |
| 03/11/1997 | US5609207 Epoxy resin composition and well treatment method |
| 03/11/1997 | US5609206 Plant derived catechol complexes and processes |
| 03/09/1997 | CA2184959A1 Foamable drilling fluid and methods of use in well drilling operations |
| 03/05/1997 | EP0760391A1 Water-based drilling fluid |
| 03/04/1997 | US5608005 Copolymerizing acrylic acid and/or neutralized acrylic acid with a polyfunctional crosslinker monomer in a silicone solvent under inert atmosphere in presence of initiator |
| 03/04/1997 | US5607905 Alkaline water well drilling fluids and gorming filter cakes from bore holes in subterranean formations |
| 03/04/1997 | US5607904 Nonionic alkanolamides as shale stabilizing surfactants for aqueous well fluids |
| 03/04/1997 | US5607902 Method of treating shale and clay in hydrocarbon formation drilling |
| 03/04/1997 | US5607901 Environmentally safe annular fluid |
| 03/04/1997 | US5607016 Injecting displacement gas and liquid vaporizable hydrocarbon solvent |
| 03/01/1997 | CA2184240A1 Method for treating oil production systems |
| 02/27/1997 | WO1997007320A1 A method for predetermining a polymer for inhibiting hydrate formation |
| 02/27/1997 | WO1997007183A1 Drilling fluid |
| 02/27/1997 | WO1997007176A1 Solutions and methods for inhibiting corrosion |
| 02/26/1997 | EP0741755A4 Polyaspartic acid having more than 50 % beta form and less than 50 % alpha form |
| 02/26/1997 | EP0639240B1 Microencapsulated oil field chemicals and process for their use |
| 02/25/1997 | US5605879 Olefin isomers as lubricants, rate of penetration enhancers, and spotting fluid additives for water-based drilling fluids |
| 02/19/1997 | CN1143104A Effective composite for removing asphalt |
| 02/19/1997 | CN1143087A Resin coated product containing bisphenol and its using method |
| 02/19/1997 | CN1034086C Heteropolysaccharide S-657 |
| 02/18/1997 | US5604186 Introducing aqueous fracturing fluid into contact with enzyme breaker comprising particulate cellulose substrate coated with enzyme solution and encapsulated by membrane of partially hydrolyzed crosslinked acrylic polymer |
| 02/18/1997 | US5604185 Inhibition of scale from oil well brines utilizing a slow release composition and a preflush and/or after flush |
| 02/18/1997 | US5604184 Chemically inert resin coated proppant system for control of proppant flowback in hydraulically fractured wells |
| 02/13/1997 | WO1997005212A1 Potassium silicate drilling fluid |
| 02/13/1997 | WO1996019544A3 Drill-in fluids and drilling methods |
| 02/12/1997 | EP0758011A1 Method of reducing fluid loss of well drilling and servicing fluids |
| 02/12/1997 | CN1142786A Solvent soaps and methods employing same |
| 02/11/1997 | US5602083 Use of sized salts as bridging agent for oil based fluids |
| 02/11/1997 | US5602082 Drilling fluids for improved oil recovery |
| 02/11/1997 | US5601700 Treating crude oil or water and oil emulsion with sulfite or bisulfite of alkali, alkaline earth metals or ammonium,while controlling desirable ph by adding alkali and preventing sulfur precipiation |
| 02/06/1997 | WO1997004038A1 Non-toxic, inexpensive synthetic drilling fluid |
| 02/06/1997 | WO1997003991A1 Gelation additive for hydraulic fracturing fluids |
| 02/04/1997 | US5600044 Method for inhibiting hydrate formation |
| 02/04/1997 | US5599777 Methods of using acidizing fluids in wells, and compositions used therein |
| 02/04/1997 | US5599776 Lost circulation material with rice fraction |
| 01/28/1997 | US5597784 Composite and reinforced coatings on proppants and particles |
| 01/28/1997 | US5597783 Drilling processes and fluid used in well drilling applications |
| 01/23/1997 | WO1997002404A1 Method of increasing the amount of hydrocarbons from an underground reservoir |