| 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) |
|---|
| 05/30/1978 | US4091870 Method for generating horizontal fractures in a wellbore |
| 05/30/1978 | US4091869 In situ process for recovery of carbonaceous materials from subterranean deposits |
| 05/30/1978 | US4091868 Method of treating oil wells |
| 05/23/1978 | US4091014 Process for making ether sulfonates |
| 05/23/1978 | US4090969 Method of oil recovery by flooding employing betaine solutions |
| 05/23/1978 | US4090814 Gas-lift device |
| 05/23/1978 | US4090564 Method for increasing the recovery of oil and gas from a water invaded geo-pressured water drive oil reservoir |
| 05/23/1978 | US4090560 Junction housing for use in undersea oil wells |
| 05/16/1978 | US4089548 Hydraulic releasing tool with plug |
| 05/16/1978 | US4089381 Chamber isolator and sealing means for borehole perforating tools |
| 05/16/1978 | US4089375 In situ retorting with water vaporized in situ |
| 05/16/1978 | US4089374 Producing methane from coal in situ |
| 05/16/1978 | US4089373 In situ, converting water flow to steam |
| 05/16/1978 | US4089372 Methods of fluidized production of coal in situ |
| 05/09/1978 | US4088580 Cluster screen for sand control |
| 05/09/1978 | US4088190 Oil recovery, salt of alkyl sulfoacetate |
| 05/09/1978 | US4088188 High vertical conformance steam injection petroleum recovery method |
| 05/02/1978 | US4087207 Method and apparatus for gas induced production of liquid from wells |
| 05/02/1978 | US4087130 Injecting oxygen, combustion, water gas |
| 05/02/1978 | US4086964 Oil recovery |
| 05/02/1978 | US4086963 With oxygen |
| 05/02/1978 | US4086962 Retorting oil shale, oxidation, multizonal |
| 05/02/1978 | US4086961 Method of oil recovery employing enriched gas drive with control of evolved gas |
| 05/02/1978 | US4086960 Apparatus for hydrocarbon recovery from earth strata |
| 05/02/1978 | US4086778 Subsea connection unit |
| 04/25/1978 | US4086030 Free fluid-operated well turbopump |
| 04/25/1978 | US4085972 Anaerobic organisms |
| 04/25/1978 | US4085971 Energy conserving mining system and method |
| 04/25/1978 | US4085804 Well tubing anchor with automatic slip release |
| 04/25/1978 | US4085803 Vaporization |
| 04/25/1978 | US4085800 Plugging earth strata |
| 04/25/1978 | US4085799 Oil recovery process by in situ emulsification |
| 04/25/1978 | US4085798 Method for investigating the front profile during flooding of formations |
| 04/25/1978 | US4085797 Progressive displacement of residual water past shut-in wells preparatory to tertiary oil recovery |
| 04/18/1978 | US4084640 Combined combustion for in-situ retorting of oil shales |
| 04/18/1978 | US4084639 Electrode well for electrically heating a subterranean formation |
| 04/18/1978 | US4084638 Producing electrical, thermal, physical and sonic shock effects via a high voltage cable |
| 04/18/1978 | US4084637 Method of producing viscous materials from subterranean formations |
| 04/11/1978 | US4083660 Gas drive oil well pumping system having mixing means for the gas/oil mixture |
| 04/11/1978 | US4083604 Thermomechanical fracture for recovery system in oil shale deposits |
| 04/11/1978 | US4083603 Method for the solution mining of a mineral |
| 04/11/1978 | US4083408 Well completion apparatus |
| 04/11/1978 | US4083405 Well drilling method and apparatus therefor |
| 04/11/1978 | US4083404 Oil recovery process utilizing air and superheated steam |
| 04/11/1978 | US4083402 Method of underground gasification of a coal bed |
| 04/04/1978 | US4082359 Solution mining of mineral from subterranean formation |
| 04/04/1978 | US4082358 In situ solution mining technique |
| 04/04/1978 | US4082146 Low temperature oxidation of hydrogen sulfide in the presence of oil shale |
| 04/04/1978 | US4082145 Determining the locus of a processing zone in an in situ oil shale retort by sound monitoring |
| 03/28/1978 | US4081031 Oil well stimulation method |
| 03/28/1978 | US4080916 Maritime platform assemblies |
| 03/21/1978 | US4079998 Lixiviant recirculator for in situ mining |
| 03/21/1978 | US4079784 Method for in situ combustion for enhanced thermal recovery of hydrocarbons from a well and ignition system therefor |
| 03/21/1978 | US4079783 Flushing wells with sodium or calcium hydroxide |
| 03/14/1978 | US4078904 Process for forming hydrogen and other fuels utilizing magma |
| 03/14/1978 | US4078612 Well stimulating process |
| 03/14/1978 | US4078611 High temperature perforating method |
| 03/14/1978 | US4078610 Low friction loss method for fracturing a subterranean geothermal earth formation |
| 03/14/1978 | US4078609 Method of fracturing a subterranean formation |
| 03/14/1978 | US4078608 Thermal oil recovery method |
| 03/14/1978 | US4078584 Pipe system for collecting petroleum from off-shore wells located at great depths |
| 03/07/1978 | US4077671 Subterranean drilling and slurry mining method |
| 03/07/1978 | US4077481 Subterranean mining apparatus |
| 03/07/1978 | US4077472 Well flow control system and method |
| 03/07/1978 | US4077428 Transportable water injection plant |
| 02/28/1978 | USRE29553 Oil shale retort flue gas cooling and cleaning |
| 02/28/1978 | US4076458 Automatic pump speed controller |
| 02/28/1978 | US4076457 Downhole pump speed control |
| 02/28/1978 | US4076312 Method and apparatus for retorting oil shale at subatmospheric pressure |
| 02/28/1978 | US4076278 Laterally engageable flowline connector device |
| 02/28/1978 | US4076079 Full bore fracture treating assembly |
| 02/28/1978 | US4076078 Mining underground coal, basic solutions |
| 02/28/1978 | US4075862 Method and apparatus for installing underwater flowlines |
| 02/21/1978 | US4074779 Backwashing system for slurry pick-up used in hydraulic borehole mining devices |
| 02/21/1978 | US4074763 Bottom-hole gas-liquid separator |
| 02/21/1978 | US4074758 Extraction method and apparatus |
| 02/21/1978 | US4074757 Method using lignosulfonates for high-temperature plugging |
| 02/21/1978 | US4074756 Apparatus and method for well repair operations |
| 02/21/1978 | US4074755 Ion exchange controlled chemically aided waterflood process |
| 02/21/1978 | US4074754 Method for producing geothermal energy and minerals |
| 02/21/1978 | US4074541 Method of installing a flexible riser |
| 02/14/1978 | US4073734 Marine separator |
| 02/14/1978 | US4073323 Tubing deflector |
| 02/07/1978 | US4072481 Device for separating multiple phase fluid systems according to the relative specific gravities of the phase |
| 02/07/1978 | US4072350 Multi-stage method of operating an in situ oil shale retort |
| 02/07/1978 | US4072193 Propping agent and method of propping open fractures in the walls of a bored well |
| 02/07/1978 | US4072191 Fire floor process |
| 02/07/1978 | US4072190 Motion compensator |
| 01/31/1978 | US4071458 Oil displacement fluid containing a solubilizing agent |
| 01/31/1978 | US4071278 Leaching methods and apparatus |
| 01/31/1978 | US4071096 Shaped charge well perforating apparatus |
| 01/31/1978 | US4071087 Well construction |
| 01/31/1978 | US4071086 Apparatus for pulling tools into a wellbore |
| 01/24/1978 | US4070168 Inlet assembly for an oil separator |
| 01/24/1978 | US4069868 Gasification, pyrolysis, liquefaction |
| 01/24/1978 | US4069867 Cyclic flow underground coal gasification process |
| 01/24/1978 | US4069685 Method of and device for forming a fluidtight duct transition through a wall |
| 01/24/1978 | US4069682 Articulated joints for deep water installations |
| 01/17/1978 | US4069161 Preparation of aqueous solutions of polyacrylamides |
| 01/17/1978 | US4068729 Apparatus for multiple wells through a single caisson |