| 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) |
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| 07/19/1983 | US4393934 Conditioning a coal seam prior to in-situ gasification |
| 07/19/1983 | US4393933 Determination of maximum fracture pressure |
| 07/19/1983 | US4393932 Method and apparatus for uniformly packing gravel around a well casing or liner |
| 07/19/1983 | US4393931 Combination hydraulically set hanger assembly with expansion joint |
| 07/19/1983 | US4393928 Apparatus for use in rejuvenating oil wells |
| 07/19/1983 | US4393927 Apparatus for positioning a treating liquid at the bottom of a well |
| 07/19/1983 | CA1150324A1 Acid dissolvable cements and methods of using the same |
| 07/13/1983 | EP0083366A1 Moving mass pump jack and method of operation |
| 07/12/1983 | US4393151 Enhanced oil recovery |
| 07/12/1983 | US4392782 Liquid level controller |
| 07/12/1983 | US4392532 Minimum temperature correction method for locating and setting gas-lift valves |
| 07/12/1983 | US4392531 Earth storage structural energy system and process for constructing a thermal storage well |
| 07/12/1983 | US4392530 Method of improved oil recovery by simultaneous injection of steam and water |
| 07/12/1983 | US4392527 Water well developing system |
| 07/12/1983 | CA1149733A1 Method for producing viscous hydrocarbons |
| 07/05/1983 | US4391467 System for producing a uniform rubble bed for in situ processes |
| 07/05/1983 | US4391337 High-velocity jet and propellant fracture device for gas and oil well production |
| 07/05/1983 | US4391332 Offshore facility for recovery hydrocarbon deposits from deep sea beds |
| 07/05/1983 | US4391327 Solvent foam stimulation of coal degasification well |
| 07/05/1983 | US4391325 Liner and hydraulic liner hanger setting arrangement |
| 07/05/1983 | US4391297 Mono-rail boom supported articulated service line |
| 06/29/1983 | EP0082377A1 Extendable support for telescoping boom |
| 06/28/1983 | US4390973 Method for determining the extent of subsurface reaction involving acoustic signals |
| 06/28/1983 | US4390321 Control apparatus and method for an oil-well pump assembly |
| 06/28/1983 | US4390068 Carbon dioxide stimulated oil recovery process |
| 06/28/1983 | US4390067 Method of treating reservoirs containing very viscous crude oil or bitumen |
| 06/28/1983 | US4390066 Well location pattern for secondary and tertiary recovery |
| 06/28/1983 | US4390065 Apparatus for well treating |
| 06/28/1983 | US4390063 Geothermal wellhead packing assembly |
| 06/28/1983 | US4390061 Apparatus for production of liquid from wells |
| 06/28/1983 | CA1148855A1 Arrangement of wells for producing subsurface viscous petroleum |
| 06/28/1983 | CA1148854A1 Method and apparatus for recovering high viscosity oils |
| 06/28/1983 | CA1148852A1 Chemical cutting apparatus |
| 06/28/1983 | CA1148834A1 Breaking oil-in-water emulsions |
| 06/21/1983 | US4389320 Foamable compositions and formations treatment |
| 06/21/1983 | US4388971 Hanger and running tool apparatus and method |
| 06/21/1983 | US4388970 Apparatus and method for controlling injection fluid flow in a well annulus |
| 06/21/1983 | US4388968 Downhole tool suction screen assembly |
| 06/14/1983 | US4388022 Flexible flowline bundle for compliant riser |
| 06/14/1983 | US4387773 Shaped charge well perforator |
| 06/14/1983 | US4387771 Wellhead system for exploratory wells |
| 06/14/1983 | US4387770 Process for selective injection into a subterranean formation |
| 06/14/1983 | US4387768 Modified in situ retorting of oil shale |
| 06/14/1983 | US4387767 Subsurface safety valve system with hydraulic packer |
| 06/14/1983 | CA1148077A1 Method of monitoring the recovery of minerals from shallow geological formations |
| 06/07/1983 | USRE31265 Method and apparatus for making subsea pipe connections |
| 06/07/1983 | US4386806 Use of polymeric material that gels under acidic conditions |
| 06/07/1983 | US4386665 Drilling technique for providing multiple-pass penetration of a mineral-bearing formation |
| 06/07/1983 | US4386658 Solvent push-pull process for improving vertical conformance of steam drive process |
| 06/07/1983 | US4386657 Process for the underground gasification of coal and carbonaceous materials |
| 06/07/1983 | US4386655 Downhole pump with floating seal means |
| 06/07/1983 | US4386654 Hydraulically operated downhole oil well pump |
| 06/07/1983 | US4386653 Anti-gas locking apparatus |
| 06/07/1983 | US4386531 Method and apparatus for determining the injection pressure during injection operations during construction work |
| 06/07/1983 | CA1147644A1 Open surface flotation method for extracting crude oil |
| 06/07/1983 | CA1147643A1 Method of selective diversion in deviated wellbores using ball sealers |
| 05/31/1983 | US4385784 Method for forming an in situ oil shale retort |
| 05/31/1983 | US4385663 Packerless well completion assembly |
| 05/31/1983 | US4385662 Method of cyclic solvent flooding to recover viscous oils |
| 05/31/1983 | CA1147487A1 Method for precisely controlling the dissolution rate of water-soluble vinyl polymers |
| 05/31/1983 | CA1147258A1 Anchor and anchor positioner assembly |
| 05/31/1983 | CA1147257A1 Multiple-purpose underground fluid injection system |
| 05/31/1983 | CA1147256A1 Seal assembly |
| 05/31/1983 | CA1147255A1 Hydra-jet slotting tool |
| 05/25/1983 | EP0079832A1 Process and plant for the production fo fuel gas by anaerobic fermentation of organic residues |
| 05/25/1983 | EP0079624A2 Gas turbine power station with an air storage system |
| 05/24/1983 | US4384961 Process for filtration of aqueous oil-containing brines |
| 05/24/1983 | US4384616 Method of placing pipe into deviated boreholes |
| 05/24/1983 | US4384615 Method of mixing fluids in a well bore |
| 05/24/1983 | US4384614 Method of retorting oil shale by velocity flow of super-heated air |
| 05/24/1983 | US4384613 Heating without combustion |
| 05/24/1983 | CA1146901A1 Energy saving heavy crude oil emulsion treating method and apparatus for use therewith |
| 05/17/1983 | US4383930 Mobility control agent |
| 05/10/1983 | US4382717 Connection of underwater lines |
| 05/10/1983 | US4382716 Blowout recovery system |
| 05/10/1983 | US4382623 Apparatus for retrieving fluid plug |
| 05/10/1983 | US4382470 Method and well casing |
| 05/10/1983 | US4382469 Method of in situ gasification |
| 05/03/1983 | US4381873 Increasing permeability of ores by fracturing |
| 05/03/1983 | US4381821 Blast joint and protection element therefor |
| 05/03/1983 | US4381820 Filament reinforced plastic screen and apparatus for making same |
| 05/03/1983 | CA1145795A1 Safety switch for well tools |
| 05/03/1983 | CA1145670A1 Method of thermal-mine working of oil reservoir |
| 05/03/1983 | CA1145669A1 Process for in-situ leaching of uranium |
| 05/03/1983 | CA1145668A1 Process for in-situ leaching of uranium |
| 05/03/1983 | CA1145667A1 Treatment of subsuraface gas-bearing formations to reduce water production therefrom |
| 05/03/1983 | CA1145666A2 Method of gravel packing at least one zone pierced by a well bore |
| 05/03/1983 | CA1145665A2 Method for gravel packing |
| 05/03/1983 | CA1145664A1 Method and apparatus for gravel packing multiple zones |
| 05/03/1983 | CA1145663A1 Crossover tool |
| 04/28/1983 | WO1983001471A1 Separating collector for subsea blowouts |
| 04/26/1983 | US4381177 Sonic pressure wave surface operated pump |
| 04/26/1983 | US4381175 Jet electric pump |
| 04/26/1983 | US4381124 Method of mining an oil deposit |
| 04/26/1983 | US4381035 Simultaneous recovery of thermal values and organic materials from solid carbonaceous fuels and waste disposal process |
| 04/26/1983 | CA1145447A1 Riser angle positioning system and process |
| 04/26/1983 | CA1145326A1 Cylindrical and orthogonal-spiral mixing flow system for particulates and liquids |
| 04/26/1983 | CA1145248A1 Oil recovery method utilizing a surfactant slug driven by water of a controlled salinity |
| 04/26/1983 | CA1145247A1 Miscible displacement oil recovery method |
| 04/26/1983 | CA1145246A1 Temporarily plugging a subterranean reservoir with a self-foaming aqueous solution |