| 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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| 04/26/1983 | CA1145245A1 Method and apparatus for gravel packing multiple zones |
| 04/26/1983 | CA1145119A1 Use of steel plant waste dusts for scavenging hydrogen sulfide |
| 04/20/1983 | EP0077275A2 Pump-down stinger assembly method and apparatus |
| 04/19/1983 | US4380266 Reservoir-tailored CO2 -aided oil recovery process |
| 04/19/1983 | US4380265 Method of treating a hydrocarbon producing well |
| 04/19/1983 | CA1144856A1 Method of aquifer restoration |
| 04/14/1983 | WO1983001273A1 Extraction from oil fields with reinjection of separated materials |
| 04/14/1983 | WO1983001272A1 Earth storage structural energy system |
| 04/12/1983 | US4379593 Rubblizing to produce a plurality of stopes |
| 04/12/1983 | US4379592 Method of mining an oil-bearing bed with bottom water |
| 04/12/1983 | US4379591 Two-stage oil shale retorting process and disposal of spent oil shale |
| 04/12/1983 | US4379590 Ventilation air and process air distribution for in situ oil shale retorts |
| 04/12/1983 | US4379489 Combustion of sulfur and oxygen to form sulfur dioxide |
| 04/12/1983 | CA1144501A1 Process for stimulating and upgrading the oil production from a heavy oil reservoir |
| 04/12/1983 | CA1144476A1 Liner hanger and running and setting tool |
| 04/12/1983 | CA1144474A1 In situ combustion process for the recovery of liquid carbonaceous fuels from subterranean formations |
| 04/12/1983 | CA1144473A2 Explosive fracturing of deep rock |
| 04/05/1983 | US4378949 Production of shale oil by in-situ retorting of oil shale |
| 04/05/1983 | US4378847 Valve |
| 04/05/1983 | US4378845 Sand control method employing special hydraulic fracturing technique |
| 04/05/1983 | US4378843 Method for completion of wells |
| 04/05/1983 | US4378842 Valve |
| 04/05/1983 | US4378841 Ignition technique for an in situ oil shale retort |
| 04/05/1983 | US4378840 Bimetallic well screen use in injection wells and method of making same |
| 04/05/1983 | CA1144066A1 Side pocket mandrel and method of construction |
| 04/05/1983 | CA1144064A1 Method for producing heavy crude |
| 03/31/1983 | WO1983001086A1 System for preventing liquids from being driven to the flair stack tip |
| 03/30/1983 | EP0075520A2 Perforating gun indexed wiring harness |
| 03/30/1983 | EP0075515A1 Method and installation for oil recovery by in situ combustion |
| 03/29/1983 | US4378294 Filament wound well screen and method and apparatus for making same |
| 03/29/1983 | US4378131 Method for restoring molybdenum to base line level in leached formation |
| 03/29/1983 | US4378048 Substoichiometric combustion of low heating value gases using different platinum catalysts |
| 03/29/1983 | US4378047 Device for in situ recovery of gaseous hydrocarbons and steam |
| 03/22/1983 | US4377478 Separating one liquid from another |
| 03/22/1983 | US4377208 Recovery of natural gas from deep brines |
| 03/22/1983 | CA1143282A1 Method of and apparatus for positioning a submarine structure |
| 03/22/1983 | CA1143280A1 Method for steam injection in steeply dipping formations |
| 03/22/1983 | CA1143217A1 Jet pump nozzle assembly |
| 03/15/1983 | US4376676 Vertical cylinder with spiralled vane and inner tube having contact disks; in-line separation of gas, oil, and water |
| 03/15/1983 | US4376463 Method of applying tensile stress to a casing |
| 03/15/1983 | US4376462 Warm brine or water carries hydrocarbon vapors |
| 03/15/1983 | CA1142795A1 Well pump with through access for wire line operation |
| 03/09/1983 | EP0073612A2 Surfactant enhanced injectivity of xanthan mobility control solutions for tertiary oil recovery |
| 03/09/1983 | EP0073610A2 Method and apparatus for drilling a well bore |
| 03/09/1983 | EP0073576A1 Method for the sub-terranean generation of heat |
| 03/08/1983 | US4376098 Two-stage uranium in situ leaching process |
| 03/08/1983 | US4375835 Oil production system |
| 03/08/1983 | US4375834 Casing perforation method and apparatus |
| 03/08/1983 | US4375833 Automatic well treatment system |
| 03/08/1983 | CA1142455A1 Separator for oil, gas and water |
| 03/08/1983 | CA1142336A1 Post-primary oil recovery employing thickened aqueous alkaline flood |
| 03/02/1983 | EP0072898A1 Hinge joint for connecting a movable support structure of an offshore platform to a foundation |
| 03/01/1983 | US4375302 Reacting nahcolite and dawsonite with sodium hydroxide containing a surfactant |
| 03/01/1983 | US4375238 Method for recovery of oil from reservoirs of non-uniform permeability |
| 03/01/1983 | CA1141945A1 Preparation of viscous aqueous liquids for wellbore injection |
| 02/22/1983 | US4374739 Cationic polymers for stabilization |
| 02/22/1983 | US4374545 Carbon dioxide fracturing process and apparatus |
| 02/22/1983 | US4374544 Technique for control of injection wells |
| 02/22/1983 | US4374543 Apparatus for well treating |
| 02/22/1983 | CA1141658A1 Method of controlling an erupted marine oil well |
| 02/22/1983 | CA1141656A1 Apparatus for and method of operating a well |
| 02/22/1983 | CA1141654A1 In situ recovery of heavy crude oils and tars by hydrocarbon vapor injection |
| 02/16/1983 | EP0071633A1 Offshore pollution control |
| 02/15/1983 | US4373834 Portable off shore well installation apparatus |
| 02/15/1983 | US4373752 Well casing hanger assembly |
| 02/15/1983 | US4373586 Method of solvent flooding to recover viscous oils |
| 02/15/1983 | US4373585 Method of solvent flooding to recover viscous oils |
| 02/15/1983 | US4373584 Single trip tubing hanger assembly |
| 02/15/1983 | US4373581 Apparatus and method for radio frequency heating of hydrocarbonaceous earth formations including an impedance matching technique |
| 02/15/1983 | CA1141146A1 Oil recovery by fluorochemical surfactant waterflooding |
| 02/08/1983 | US4372757 Offshore platform deck drainage |
| 02/08/1983 | US4372706 Emergency cable gripper |
| 02/08/1983 | US4372616 Method for restoring formation previously leached with an ammonium leach solution |
| 02/08/1983 | US4372615 Method of rubbling oil shale |
| 02/08/1983 | US4372389 Downhole water pump and method of use |
| 02/08/1983 | US4372387 Downhole tool with ratchet |
| 02/08/1983 | US4372386 Generation of heat in an endothermic-exothermic reversible reaction |
| 02/08/1983 | US4372384 Well completion method and apparatus |
| 02/08/1983 | US4372383 In situ separation of bitumen from bitumen-bearing deposits |
| 02/08/1983 | US4372381 Method for recovery of oil from tilted reservoirs |
| 02/08/1983 | US4372380 Method for determination of fracture closure pressure |
| 02/08/1983 | US4372379 Rotary drive assembly for downhole rotary pump |
| 02/08/1983 | US4372344 Ball and socket joint with fluid flow capability through the joint |
| 02/03/1983 | WO1983000337A1 Self-inverting water-in-oil emulsions of water-soluble polymers and a process for preparing the emulsions |
| 02/01/1983 | US4371444 Nonionic or anionic surfactants |
| 02/01/1983 | US4371434 Degasser-dehydrator |
| 02/01/1983 | US4371291 Underwater flowline connector |
| 02/01/1983 | US4371044 Simultaneous multigun high density multiphase perforating unit |
| 02/01/1983 | US4371038 Apparatus and method for injecting fluid into a well |
| 02/01/1983 | US4371037 Transfer terminal for offshore production |
| 02/01/1983 | US4371005 Protective cover for underwater flow line hub |
| 02/01/1983 | CA1140459A1 Method and apparatus for pumping fluids from bore holes |
| 02/01/1983 | CA1140457A1 Method for recovering methane from coal seams |
| 02/01/1983 | CA1140456A1 Process and device using a liquid agent for treating a geological formation in the path of a drill hole |
| 02/01/1983 | CA1140326A1 Anhydrous foam with gas for acidizing high temperatures subterraneam formations |
| 01/25/1983 | US4370003 Temporary gas seal for gas level drift of an in situ oil shale retort |
| 01/25/1983 | US4369842 Analyzing oil shale retort off-gas for carbon dioxide to determine the combustion zone temperature |
| 01/25/1983 | US4369841 Method for igniting an in situ oil shale retort |
| 01/25/1983 | US4369840 Anchor and anchor positioner assembly |
| 01/25/1983 | US4369839 Casing vacuum system |