| 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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| 06/02/1981 | US4270607 Displacing the oil with a polyoxyalkylene sulfonate surfactant and brine |
| 06/02/1981 | CA1102234A1 Gaseous and solvent additives for steam injection for thermal recovery of bitumen from tar sands |
| 05/26/1981 | US4269974 Shearing pasteurized xanthum gum beer; smoothness; stabilizers for oil in water emulsions; salad dressings; enhanced oil recovery |
| 05/26/1981 | US4269279 Spheroidal plastic coated magnetizable particles and their use in drilling fluids |
| 05/26/1981 | US4269271 Anionic or nonionic alkoxylated surfactant |
| 05/26/1981 | US4269270 Pretreatment injection of the well to prevent adsorption of surfactant and polymer by rock matrix |
| 05/26/1981 | CA1102030A1 Process for the treatment of aqueous solutions of partially hydrolyzed polyacrylamides |
| 05/19/1981 | US4268403 Oil recovery using a dimethylamide in a fluid carrier |
| 05/19/1981 | US4268400 Aqueous drilling fluid additive, composition and process |
| 05/19/1981 | US4267887 Method for acidizing high temperature subterranean formations |
| 05/19/1981 | US4267886 Lignosulfonates carboxylated with chloroacetic acid as additives in oil recovery processes involving chemical recovery agents |
| 05/12/1981 | US4267062 Abandoned borehole compositions |
| 05/12/1981 | US4266611 Oil recovery method employing alternate slugs of surfactant and fresh water solution of polymer |
| 05/12/1981 | US4266610 Sulfonate-cosurfactant mixtures for use in hard brines during oil recovery operations |
| 05/05/1981 | US4265673 Polymer solutions for use in oil recovery containing a complexing agent for multivalentions |
| 05/05/1981 | US4265311 Methods of water flooding and fracturing using clean, non-damaging fracturing fluids |
| 05/05/1981 | US4265308 Oil recovery method using unique salinity for oil recovery surfactant system |
| 05/05/1981 | CA1100300A1 Treating subterranean well formations |
| 04/28/1981 | US4264486 Methods of forming isocyanate polymers |
| 04/28/1981 | US4264455 Drilling mud viscosifier |
| 04/28/1981 | CA1100032A1 Single well surfactant test to evaluate surfactant floods using multi tracer method |
| 04/28/1981 | CA1099908A1 No translation available |
| 04/21/1981 | US4262746 Prehydrating, mixing with hard brine, injecting behind crude oil |
| 04/21/1981 | CA1099503A1 Well cementing in permafrost |
| 04/16/1981 | WO1981001007A1 Amphoteric water-in-oil self-inverting polymer emulsion |
| 04/14/1981 | US4261422 Absorption of water by swellable clay particles in hydrocarbon liquid |
| 04/14/1981 | US4261421 Method for selectively acidizing the less permeable zones of a high temperature subterranean formation |
| 04/14/1981 | US4261420 Microbiological production of carbon dioxide which is injected under pressure into underground formation of crude oil |
| 04/14/1981 | CA1099088A1 Well treating composition and method |
| 04/07/1981 | US4260498 Silane coated silicate minerals and method for preparing same |
| 04/07/1981 | US4260019 Phenolic resins |
| 04/07/1981 | CA1098819A1 Viscous oil recovery method |
| 04/07/1981 | CA1098690A1 Process for fracturing well formations using aqueous gels |
| 04/07/1981 | CA1098689A1 Oil recovery process involving the injection of thickened water |
| 04/07/1981 | CA1098688A1 Removal of water from gas well borehole with solid foaming agent |
| 04/02/1981 | WO1981000874A1 Shear thickening fluid |
| 04/02/1981 | WO1981000851A1 Well treating fluid |
| 04/02/1981 | WO1981000850A1 Shear thickening well control fluid |
| 03/31/1981 | US4259534 Method for the production of 2,4,6-tri(3,5-ditertiary butyl-4-hydroxybenzyl) mesitylene |
| 03/31/1981 | US4259205 Enhanced oil recovery |
| 03/31/1981 | US4259191 Enhanced oil recovery |
| 03/31/1981 | US4258791 Thermal insulation method |
| 03/31/1981 | US4258790 Well cementing method using low fluid-loss cement slurry |
| 03/31/1981 | US4258789 Cosurfactant blends for oil recovery surfactant system |
| 03/31/1981 | CA1098440A1 Method for forming channels of high fluid conductivity in formation parts around a borehole |
| 03/24/1981 | US4257903 Drilling fluid containing crosslinked polysaccharide derivative |
| 03/24/1981 | US4257813 Formation treatment with silicate activated lignosulfonate gel |
| 03/24/1981 | CA1098062A1 Process for the recovery of organic gases from ground, bedrock or bottom sediments in lakes |
| 03/24/1981 | CA1097904A1 Shale stabilizing drilling fluid |
| 03/24/1981 | CA1097903A1 Method for reducing friction loss in a well fracturing process |
| 03/24/1981 | CA1097902A1 Aqueous based slurry containing enediol breaker and method for forming a consolidated gravel pack |
| 03/17/1981 | US4256590 Modified heteropolysaccharides and their preparation |
| 03/11/1981 | EP0024880A1 Process for producing a thixotropic liquid |
| 03/10/1981 | US4255270 Identifying a pure hydrocarbon forming three phases-water, microemulsion, oil; equilibrating a mixture of sulfonate, electrolyte, and hydrocarbon; equivalent weights; enhanced oil recovery |
| 03/10/1981 | US4255268 Water-based, clay-free; ferric hydroxide compound |
| 03/10/1981 | US4254831 Method and apparatus for restoring and maintaining underground aquifer water system |
| 03/10/1981 | CA1097056A1 Treatment of water thickened systems |
| 03/10/1981 | CA1097055A1 Acidizing-gel composition |
| 03/10/1981 | CA1097054A1 Correlation of weighted effect of different ions and surfactant composition for surfactant flood |
| 03/10/1981 | CA1097053A1 Surfactants to reduce flood water mobility |
| 03/10/1981 | CA1097052A1 Aqueous surfactant systems for in situ multiphase microemulsion formation |
| 03/03/1981 | US4253974 Where the alkenyl is an olefinic polymer |
| 03/03/1981 | CA1096598A1 Scavenging hydrogen sulfide in an oil well |
| 02/24/1981 | US4252657 Comprising three anionic surfactants and a cosurfactant; enhanced oil recovery |
| 02/24/1981 | US4252655 Scavenging hydrogen sulfide in an oil well |
| 02/24/1981 | US4252194 Method of using polymerized lignosulfonates for mobility control |
| 02/24/1981 | US4252193 Low density cement slurry and its use |
| 02/24/1981 | US4252192 Sulfonation of petroleum oils, neutralization |
| 02/24/1981 | CA1096154A1 Drilling a borehole |
| 02/17/1981 | US4250965 Well treating method |
| 02/17/1981 | US4250964 Injecting cyclohexene or cyclohexadiene to reduce viscosity |
| 02/17/1981 | US4250963 Selective permeability reduction with polymerizable monomers around steam injection wells |
| 02/17/1981 | US4250961 Oil recovery method utilizing a surfactant slug driven by water of a controlled salinity |
| 02/11/1981 | EP0023712A1 Water-soluble copolymer, process for its production and its use |
| 02/10/1981 | US4250044 Breaker system for high viscosity fluids |
| 02/10/1981 | US4250042 Ammonium or amine salts of polycarboxylic acids such as sebacic or azelaic |
| 02/10/1981 | US4249609 Method for forming channels of high fluid conductivity in formation parts around a borehole |
| 02/10/1981 | US4249608 Adding as bactericide benzene, toluene, xylene or an alkyl-substituted aromatic hydrocarbon; aging resistance |
| 02/10/1981 | US4249606 Lignosulfonates carboxylated with carbon dioxide as additives in oil recovery processes involving chemical recovery agents |
| 02/10/1981 | US4249604 Recovery method for high viscosity petroleum |
| 02/10/1981 | CA1095227A1 Abandoned borehole compositions |
| 02/10/1981 | CA1095226A1 Oil recovery process utilizing aromatic solvent and steam |
| 02/04/1981 | EP0023397A1 Heteropolysaccharide; process and microorganism for producing it |
| 02/03/1981 | US4248717 Method for removing elemental sulfur from high temperature, high pressure wells and flow lines |
| 02/03/1981 | US4248304 Large scale production of inexpensive flooding polymers for tertiary oil recovery |
| 02/03/1981 | US4248301 Micellar crude oil displacement with partitioned hydrocarbon sulfonates |
| 02/03/1981 | CA1095029A1 Dihydroxypropyl cellulose |
| 01/27/1981 | US4247430 Aqueous based slurry and method of forming a consolidated gravel pack |
| 01/27/1981 | US4247405 Viscosity-stabilized aqueous solutions |
| 01/27/1981 | US4247403 Method of sealing pores, and lost circulation additive therefor |
| 01/27/1981 | US4247402 Clay-free, thixotropic wellbore fluid |
| 01/27/1981 | CA1094479A1 Process for producing xanthomonas hydrophilic colloid for use in displacement of oil from partially depleted reservoirs |
| 01/27/1981 | CA1094308A1 Oil recovery by surfactant alcohol waterflooding |
| 01/20/1981 | USRE30484 Zonal fracture treatment of well formations |
| 01/20/1981 | US4246243 Yielding free sulfur and iron hydroxides |
| 01/20/1981 | US4246124 Using a polymeric viscosifier, an aldehyde, and a phenolic compound |
| 01/20/1981 | US4245702 Method for forming channels of high fluid conductivity in hard acid-soluble formations |
| 01/20/1981 | US4245700 Enhanced oil recovery method |
| 01/20/1981 | CA1093807A1 Method of foam drilling using a biodegradable foaming agent |
| 01/20/1981 | CA1093806A1 Biodegradable foaming agent in drilling and workover operations |