Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
Patents for E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (64,186)
01/1981
01/06/1981CA1092797A1 Method for controlling permeability of subterranean formations
12/1980
12/30/1980US4241953 Sulfur mine bleedwater reuse system
12/30/1980US4241952 Surface and subsurface hydrocarbon recovery
12/30/1980US4241951 Leaching with an acid forming gas and polyelectrolyte solution
12/30/1980US4241790 Recovery of crude oil utilizing hydrogen
12/30/1980US4241788 Multiple cup downwell gas separator
12/30/1980US4241787 Downhole separator for wells
12/30/1980CA1092508A1 Process for slowly acidizing carbonate material in or around a well
12/23/1980US4240504 Simultaneous microemulsion-aqueous phase flooding process
12/23/1980CA1091912A1 Foaming and silt suspending agent
12/16/1980US4239396 Method and apparatus for blending liquids and solids
12/16/1980US4239288 Solution mining method utilizing sub-surface aquifer
12/16/1980US4239287 Solution mining potassium chloride from heated subterranean cavities
12/16/1980US4239286 In situ leaching of ore bodies
12/16/1980US4239285 Method of attenuating airblast from detonating explosive in an in situ oil shale retort
12/16/1980US4239284 Situ retort with high grade fragmented oil shale zone adjacent the lower boundary
12/16/1980US4239283 In situ oil shale retort with intermediate gas control
12/16/1980US4239084 Acid soluble coating for well screens
12/16/1980US4239083 Method and apparatus for rotating tubing conduits
12/16/1980US4239082 Multiple flow valves and sidepocket mandrel
12/16/1980CA1091589A1 Wire-wrapped screen with upstream baffle
12/16/1980CA1091576A1 Ion exchange controlled chemically aided waterflood oil recovery process
12/16/1980CA1091575A1 Apparatus for mixing gas and liquid at a downhole location
12/11/1980WO1980002720A1 Removing elemental sulfur from high temperature,high pressure wells
12/10/1980EP0019683A2 Water removal device for slopingly inclined drill-holes
12/09/1980US4238136 Formation of in situ oil shale retort with void at the top
12/09/1980US4237977 Removal of water from gas well borehole with solid foaming agent
12/09/1980US4237976 Hydraulic well pumping method
12/09/1980US4237974 Injecting a soluble metal halide or sulfate-containing gel pad fluid before acidification
12/09/1980CA1091146A1 Automatic device for positioning and coupling two submerged blocks
12/09/1980CA1091145A1 Well casing hanger assembly
12/09/1980CA1090999A1 Method for improving calcium ion tolerance of hydrocarbon polymer sulfonate surfactants used in enhanced recovery processing in subterranean oil- bearing formations
12/02/1980US4237017 Steam flooding hydrocarbon recovery composition
12/02/1980US4236734 Well tubing coupling system
11/1980
11/25/1980US4235289 Method for producing carbon dioxide from subterranean formations
11/25/1980US4235288 Well pumping control system
11/25/1980CA1090113A1 Low-temperature oxidation method for the recovery of heavy oils and bitumen
11/25/1980CA1090112A1 Breaker for low temperature gels
11/18/1980US4234768 Selective fire perforating gun switch
11/18/1980US4234232 Methods of and apparatus for mining and processing tar sands and the like
11/18/1980US4234231 Method for restoring a leached formation
11/18/1980US4234230 In situ processing of mined oil shale
11/18/1980US4234042 Direct combustion stimulation of a producing well
11/18/1980CA1089761A1 Method and apparatus for mixing gaseous oxidant and lixiviant in an in situ leach operation
11/18/1980CA1089760A1 Method for placing ball sealers onto casing perforations
11/12/1980EP0018582A1 Process for underground gasification of coal
11/11/1980US4233166 Composition for recovering hydrocarbons
11/11/1980US4233154 Method for treating petroleum well pumping power fluid
11/11/1980US4233132 Electrolysis of water under layer of hydrocarbon oil
11/11/1980US4232902 Solution mining water soluble salts at high temperatures
11/11/1980US4232889 Recockable well hanger
11/11/1980US4232741 Temporarily plugging a subterranean reservoir with a self-foaming aqueous solution
11/11/1980US4232738 Injection of nonaqueous petroleum distillates
11/11/1980US4232736 Leak detection system and control using non-rigid bladder
11/11/1980CA1089375A1 Bottom-hole gas-liquid separator
11/11/1980CA1089356A1 Viscous oil recovery method
11/11/1980CA1089355A1 Viscous oil recovery method
11/04/1980US4231767 Liquid-gas separator apparatus
11/04/1980US4231682 Device for handling appliances on a sea bed
11/04/1980US4231681 Structure for sea-bed exploitation allowing the various functions inherent in such exploitation to be performed
11/04/1980US4231617 Consolidation of in-situ retort
11/04/1980US4231428 Well treatment method
11/04/1980CA1088863A1 Method of and device for handling appliances on a sea bed in particular for the operation and maintenance of well heads
11/04/1980CA1088861A1 Viscous oil recovery method
11/04/1980CA1088736A1 Waterflooding employing mixtures of sulfonate surfactants
11/04/1980CA1088726A1 Carbonate leaching of uranium
10/1980
10/29/1980EP0018168A2 Separator for separating oil and gas
10/28/1980US4230368 Method for displacing large blocks of earth
10/28/1980US4230367 Explosive fragmentation, retorting in situ
10/28/1980US4230187 Methods and apparatus for sensing wellhead pressure
10/28/1980US4230186 Simplified subsea production wellhead
10/28/1980US4230181 In situ method of processing bituminous coal
10/28/1980CA1088416A1 Thermal oil recovery method
10/28/1980CA1088415A1 Thermal oil recovery method
10/28/1980CA1088414A1 High vertical and horizontal conformance viscous oil recovery method
10/21/1980US4228857 Floating platform well production apparatus
10/21/1980US4228856 Process for recovering viscous, combustible material
10/21/1980US4228854 Enhanced oil recovery using electrical means
10/21/1980US4228853 Petroleum production method
10/21/1980CA1087976A1 Oil recovery process
10/15/1980EP0017398A1 Demolition agent, its preparation and its use
10/14/1980US4228018 Secondary recovery process
10/14/1980US4228017 Acrylamide-vinylsulfonic acid copolymer alkoxylated with glycidol
10/14/1980US4228016 Secondary recovery process
10/14/1980US4227743 Method of thermal-mine recovery of oil and fluent bitumens
10/14/1980US4227582 Well perforating apparatus and method
10/14/1980US4227574 Explosive expansion, combustion
10/14/1980CA1087518A1 Gas withdrawal from an in situ oil shale retort
10/14/1980CA1087517A1 Starting gas production by injecting nitrogen- generating liquid
10/14/1980CA1087516A1 Determining residual oil saturation following flooding
10/14/1980CA1087407A1 Articulated column for the exploitation of marine bottom resources, comprising pipings connectable between the column and its base
10/07/1980US4226284 Gas well dewatering method and system
10/07/1980CA1087091A1 Combustion air injection well
10/07/1980CA1087090A1 Thermostatically controlled valve for automatically regulating the flow of a cooling liquid for gases obtained by underground gasification of solid fuels or by "in situ" combustion of underground hydrocarbons
10/01/1980EP0016146A1 Separating one liquid from another.
09/1980
09/30/1980US4225270 Method and apparatus for connecting a flowline to an offshore installation
09/30/1980US4224993 Dewaxing valve for use in oil wells
09/30/1980US4224992 Method for enhanced oil recovery
09/30/1980US4224990 Method for flattening the combustion zone in an in situ oil shale retort by the addition of fuel
09/30/1980CA1086637A1 Method for generating hydrofluoric acid in a subterranean formation
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