| 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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| 08/12/1997 | US5656070 Protective coatings on iron and aluminium surfaces; microbiocides; metal derivatives of lignin and tannins |
| 08/12/1997 | US5655601 Method for scale inhibitor squeeze application to gas and oil wells |
| 08/07/1997 | WO1997028231A1 Corrosion inhibition in petroleum and natural gas production |
| 08/07/1997 | WO1997028230A1 Scale inhibition in petroleum and natural gas production |
| 08/07/1997 | WO1997028097A1 Cement additives and cement compositions including said additives |
| 08/07/1997 | CA2244963A1 Cement additives and cement compositions including said additives |
| 08/06/1997 | EP0787698A1 Well cementing method |
| 08/05/1997 | US5654261 Dry mixture of water-soluble polymer and an aluminum citrate preparation |
| 08/05/1997 | US5654260 Mixture of phenolic compound and a hydroxide |
| 07/31/1997 | WO1997027266A1 Hydrocarbon gels useful in formation fracturing |
| 07/31/1997 | WO1997027152A1 Sugar and/or acid addition to anionic polysaccharide-containing cementitious formulations |
| 07/31/1997 | DE19603027A1 Verwendung von mit Aminen hydrophob modifizierten Polyasparaginsäuren als Korrosionsinhibitoren bei der Erdöl- und Erdgasgewinnung Use of amines with hydrophobically modified polyaspartic acids as corrosion inhibitors in oil and gas extraction |
| 07/31/1997 | DE19603026A1 Verwendung von Mischungen aus Aminphosphaten und Polyasparaginsäure oder Asparaginsäure-Copolykondensaten als Scale-Inhibitoren bei der Erdöl- und Erdgasgewinnung Using mixtures of amine phosphates and polyaspartic acid or aspartic acid copolycondensates as scale inhibitors in the oil and gas extraction |
| 07/30/1997 | EP0786507A1 Brine fluids having improved rheological characteristics |
| 07/29/1997 | US5652200 Water based drilling fluid additive and methods of using fluids containing additives |
| 07/29/1997 | CA1339143C Alkenylphosphonic and -phosphinic acid esters, process for their preparation, hydrogels produced using them, and their use |
| 07/29/1997 | CA1339113C Family of xanthan-based polysaccharide polymers including non-acetylatedand/or non-pyruvylated gum and acetylated or non-acetylated polytetramergum |
| 07/24/1997 | WO1997026311A1 High density viscosified aqueous compositions |
| 07/24/1997 | WO1997026310A1 Viscosification of high density brines |
| 07/24/1997 | WO1997026238A1 High stability and low metals esters based on 3,5,5-trimethyl-1-hexanol |
| 07/24/1997 | CA2242389A1 High stability and low metals esters based on 3,5,5-trimethyl-1-hexanol |
| 07/23/1997 | EP0784651A1 Alginate gels |
| 07/22/1997 | US5650379 Process for reducing permeability in a subterranean hydrocarbon-bearing formation utilizing a gelation solution having a controlled gelation rate |
| 07/22/1997 | US5649596 Use of breaker chemicals in gelled hydrocarbons |
| 07/16/1997 | EP0626002B1 High density aqueous compositions |
| 07/15/1997 | US5648575 Method for inhibiting the plugging of conduits by gas hydrates |
| 07/15/1997 | US5647900 Preparation of hydrocarbon gels from ferric sources, polycarboxylic acid compounds, and optional amines, in combination with phosphate esters |
| 07/10/1997 | WO1997024472A1 Corrosion inhibition by ethoxylated fatty amine salts of maleated unsaturated acids |
| 07/09/1997 | EP0783073A2 Treating a subterranean formation with particulate |
| 07/09/1997 | EP0721534A4 Control of iron deposition in borehole pumps |
| 07/08/1997 | US5646093 Contacting formation with hydroxyalkylated derivative |
| 07/08/1997 | US5646092 Pretreated clays, their preparation and use in formulation drilling muds not aggressive to layer clays |
| 07/03/1997 | WO1997023547A1 Wax deposit inhibitors |
| 07/02/1997 | EP0781729A1 Process for the controlled fixing of scale inhibitor in subterranean formations |
| 07/02/1997 | CN1153202A Method for thermo-chemical dewaxing of large dimension lines |
| 07/01/1997 | US5643858 High density aqueous compositions |
| 07/01/1997 | US5643500 Methods for inhibiting water corrosion in crude oil pipelines |
| 07/01/1997 | US5642783 Process for treating oil-bearing formation |
| 07/01/1997 | CA2029312C Thermal barriers for enhanced oil recovery |
| 07/01/1997 | CA2006786C Composition for selective placement of polymer gels for profile control in thermal oil recovery |
| 07/01/1997 | CA2006785C Method for preventing steam channelling into a non-aquifer bottom water zone |
| 06/30/1997 | CA2184548A1 Composition and method to control cement slurry loss and viscosity |
| 06/26/1997 | WO1997022677A1 Drilling fluid loss prevention and lubrication additive |
| 06/26/1997 | WO1997022676A1 New aqueous swellable compositions of guar gum and guar gum derivatives in oleophilic liquids and their use |
| 06/26/1997 | WO1997022638A1 Compositions and processes for treating subterranean formations |
| 06/26/1997 | WO1997022564A1 Methods for improved rheological control in cementitious systems |
| 06/25/1997 | EP0780406A2 Phosphonic acid polymers |
| 06/25/1997 | EP0780166A1 Method and appararus for remediation of contaminated soil |
| 06/24/1997 | US5641728 Control of the fluid loss of well drilling and servicing fluids |
| 06/24/1997 | US5641022 Method for removing paraffin and asphaltene from producing wells |
| 06/19/1997 | WO1997021905A1 Scale inhibition by squeeze application of a phosphonomethylated polyamine inhibitor |
| 06/19/1997 | WO1997021669A1 An amino nitrile intermediate for the preparation of 2-hydroxyethyl iminodiacetic acid |
| 06/19/1997 | DE19546911A1 Neue wäßrig-quellfähige Zubereitungen von Guar und Guarderivaten in oleophilen Flüssigkeiten und ihre Verwendung Last aqueous-swellable preparations of guar and guar derivatives in oleophilic liquids and their use |
| 06/19/1997 | CA2240321A1 An amino nitrile intermediate for the preparation of 2-hydroxyethyl iminodiacetic acid |
| 06/18/1997 | EP0779409A1 Traceable well cement composition and its use |
| 06/18/1997 | EP0583285B1 Use of selected oleophilic compounds with quaternary nitrogen to improve the oil wettability of finely divided clay and their use as viscosity promoters |
| 06/17/1997 | US5639925 Using polyoxazolines, n-substituted acrylamide and n-vinylalkyl amide |
| 06/17/1997 | US5639806 Phenolic resin propellant |
| 06/17/1997 | US5639715 Aqueous based drilling fluid additive and composition |
| 06/17/1997 | US5639313 Countercurrent laminar flow of water in oil emulsion containing acetic acid-activated mixture of sodium nitrite and ammonium chloride pumped into conduit to fluidize wax deposits by generated nitrogen and heat |
| 06/17/1997 | US5638902 Subterranean geology formations; enhanced oil recovery |
| 06/15/1997 | CA2192890A1 Traceable well cement compositions and methods |
| 06/12/1997 | WO1997021022A1 Hydraulic fracturing process |
| 06/12/1997 | WO1997021021A1 Foamed gel completion, workover, and kill fluid |
| 06/12/1997 | WO1997021018A1 Polymer enhanced foam workover, completion, and kill fluids |
| 06/12/1997 | CA2234546A1 Hydraulic fracturing process |
| 06/12/1997 | CA2234174A1 Foamed gel completion, workover, and kill fluid |
| 06/12/1997 | CA2234173A1 Polymer enhanced foam workover, completion, and kill fluids |
| 06/11/1997 | EP0777837A1 A method for inhibiting hydrate formation |
| 06/10/1997 | US5637635 Viscosifying water base fluids |
| 06/10/1997 | US5637557 Compositions containing derivatives of succinic acylating agent or hydroxyaromatic compounds and methods of using the same |
| 06/10/1997 | US5637556 Acrylamide copolymer containing hydrophilic and hydrophobic units; a hydrophobically modified hydroxyethyl cellulose |
| 06/05/1997 | WO1997020129A1 Method of treating an underground formation |
| 06/04/1997 | EP0599921B1 Process for removing an ester impurity from an ether |
| 06/03/1997 | US5635458 Containing low molecular weight glycol, choline salt, filtration control agent and viscosifier |
| 06/03/1997 | US5635457 Non-toxic, inexpensive synthetic drilling fluid |
| 06/03/1997 | US5634984 Contacting with solution containing two surfactants with different hydrophilic-lipophilic balance values and nonpolar diluent oil, rinsing with water |
| 06/03/1997 | US5634520 Varying water to gas ratios for efficient increase of oil mobility |
| 05/29/1997 | WO1997019145A1 Well fluid |
| 05/28/1997 | CA2185499A1 Lignosulfonate-acrylic acid graft copolymers as sacrificial agents for carbon dioxide foaming abents |
| 05/27/1997 | US5633220 Block or graft polyester |
| 05/27/1997 | US5633028 Jagged, rough edges, surfactants |
| 05/27/1997 | US5632336 Method for improving injectivity of fluids in oil reservoirs |
| 05/27/1997 | CA2104560C Injection of dextrins for subterranean microbial processes |
| 05/27/1997 | CA2097235C Acid-anhydride esters as oil field corrosion inhibitors |
| 05/21/1997 | EP0774096A1 A method for inhibiting hydrate formation |
| 05/20/1997 | US5631313 Suspending medium for particulate material |
| 05/20/1997 | US5630474 Enhanced oil recovery using aqueous emulsion containing polysiloxane and surfactant |
| 05/15/1997 | WO1997017481A1 Methods and emulsions for inhibition of oil well corrosion |
| 05/14/1997 | EP0773343A2 Extreme overbalanced perforating and fracturing process using low-density, neutrally buoyant proppant |
| 05/14/1997 | EP0772696A1 Method for removing alkaline sulfate scale |
| 05/14/1997 | EP0685026B1 Method for drilling and cementing a well |
| 05/13/1997 | US5629271 Methods of reducing fluid loss and polymer concentration of well drilling and servicing fluids |
| 05/13/1997 | US5629270 Thermally stable oil-base drilling fluid |
| 05/07/1997 | EP0771935A1 Proppants with fiber reinforced resin coatings |
| 05/07/1997 | EP0771768A1 Well cement composition and use |
| 05/06/1997 | US5627144 Composition for enhanced crude oil recovery operations containing hydrochloric acid or hydrofluoric acid, or mixtures thereof with ester quaternary ammonium compounds or/and alkyl quaternary ammonium compounds |
| 05/06/1997 | US5627143 Hydrophilic liquids in oils and aromatic hydrocarbons, cycloalkanes |
| 05/06/1997 | CA2119682C High viscosity alcohol gel for shallow wells |
| 05/06/1997 | CA2108194C High viscosity crosslinked gelled alcohol |