| 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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| 01/09/1979 | US4133378 Well tubing head |
| 01/09/1979 | US4133182 Apparatus and method of connecting a flowline to a subsea station |
| 01/09/1979 | CA1045970A1 Retorting of oil shale |
| 01/02/1979 | US4132535 Quatinized copolymer of styrene and vinylpyridine/2-/, prevents emulsion formation |
| 01/02/1979 | US4132448 Using a gaseous mixture of o2 and no2 then an aqueous alkaline solution |
| 01/02/1979 | US4132269 Generation of electricity during the injection of a dense fluid into a subterranean formation |
| 12/26/1978 | US4131416 Slurry backfilling of in situ oil shale retort |
| 12/26/1978 | US4131161 Recovery of dry steam from geothermal brine |
| 12/26/1978 | US4130995 VMP riser horizontal bearing |
| 12/26/1978 | CA1045049A1 Defoaming inlet for fluid separator |
| 12/26/1978 | CA1045028A1 Micellar dispersions via sulfonating whole or topped crude |
| 12/26/1978 | CA1045027A1 Hydraulic fracturing method using sintered bauxite propping agent |
| 12/19/1978 | US4130491 Use of betaines in mineral oil recovery |
| 12/19/1978 | US4130165 Method for selectively plugging water zones |
| 12/19/1978 | US4130164 Process for coal gasification |
| 12/19/1978 | US4130163 Method for recovering viscous hydrocarbons utilizing heated fluids |
| 12/19/1978 | CA1044597A1 Stuffing box control system |
| 12/19/1978 | CA1044595A1 Retorting of oil shale |
| 12/12/1978 | US4129334 Method for locating the remaining recoverable mineral reserves during solution mining |
| 12/12/1978 | US4129183 Use of organic acid chrome complexes to treat clay containing formations |
| 12/12/1978 | US4129182 Miscible drive in heterogeneous reservoirs |
| 12/12/1978 | CA1044133A1 Method of recovery of bitumen from tar sand formations |
| 12/05/1978 | US4128106 Gas lift valve with a tension spring biasing element |
| 12/05/1978 | US4127991 Apparatus for leveling and supporting a sub-sea drilling template |
| 12/05/1978 | CA1043550A1 Oil recovery process usable in formations containing water having high concentrations of polyvalent ions |
| 11/28/1978 | US4127173 Method of gravel packing a well |
| 11/28/1978 | US4127172 Viscous oil recovery method |
| 11/28/1978 | US4127171 Method for recovering hydrocarbons |
| 11/28/1978 | US4127170 Viscous oil recovery method |
| 11/28/1978 | US4127068 Earth strata fracturing method |
| 11/28/1978 | US4127003 Production equipment for oil-fields at sea |
| 11/28/1978 | CA1043250A1 Method for control of subsurface coal gasification |
| 11/28/1978 | CA1043091A1 Well treatment composition with carbon dioxide and method |
| 11/21/1978 | US4126183 Offshore well apparatus with a protected production system |
| 11/21/1978 | US4126182 Method for decreasing resistance to flow of crude oil up from a well or through a pipeline |
| 11/21/1978 | US4126181 Method and apparatus for formation fracturing with foam having greater proppant concentration |
| 11/21/1978 | US4126180 Method of enhancing yield from an in situ oil shale retort |
| 11/21/1978 | US4126008 Sea-floor template |
| 11/21/1978 | CA1042786A1 Riser for jointed off-shore drilling rig_ |
| 11/21/1978 | CA1042784A1 Method for initiating an in-situ recovery process by the introduction of oxygen |
| 11/21/1978 | CA1042783A1 In situ recovery of constituents from ore deposits |
| 11/21/1978 | CA1042647A1 Lignosulfonate gels for sweep improvement in flooding operations |
| 11/14/1978 | US4125289 Method for in situ minefields |
| 11/14/1978 | US4125162 Well flow system and method |
| 11/14/1978 | US4125159 Method and apparatus for isolating and treating subsurface stratas |
| 11/14/1978 | US4125157 Removing sulfur dioxide from gas streams with retorted oil shale |
| 11/14/1978 | CA1042194A1 Chemical comminution and mining of coal |
| 11/07/1978 | US4124253 Sulfur well sealing method |
| 11/07/1978 | US4124074 Method for forming a gravel pack in tar sands |
| 11/07/1978 | US4124073 Method of using viscosity-stabilized aqueous solutions |
| 11/07/1978 | US4124072 Viscous oil recovery method |
| 11/07/1978 | US4124071 High vertical and horizontal conformance viscous oil recovery method |
| 11/07/1978 | CA1041900A1 Lignosulfonates for high-temperature plugging |
| 11/07/1978 | CA1041899A1 Steam injector apparatus for wells |
| 11/07/1978 | CA1041898A1 Lignosulfonates for high-temperatures plugging |
| 10/31/1978 | US4123107 Integrated sulfur mining - sulfuric acid production system |
| 10/31/1978 | US4122899 Well perforator with anchor and method |
| 10/31/1978 | US4122897 In situ gasification process for producing product gas enriched in carbon monoxide and hydrogen |
| 10/31/1978 | US4122896 Acidizing carbonate reservoirs with chlorocarboxylic acid salt solutions |
| 10/31/1978 | US4122895 Recovery of oil |
| 10/31/1978 | CA1041560A1 Method for thermoshaft oil production |
| 10/31/1978 | CA1041420A1 Linking of a subsea well to a flexible conduit |
| 10/31/1978 | CA1041419A1 In-situ combustion method for the recovery of hydrocarbons |
| 10/31/1978 | CA1041417A1 Multiple fracturing of subterranean formations |
| 10/31/1978 | CA1041416A1 Method of fracturing subterranean formations using oil-in-water emulsions |
| 10/24/1978 | US4121895 Kinetic energy type pumping system |
| 10/24/1978 | US4121663 With fragmented permeable mass of oil shale |
| 10/24/1978 | US4121662 Water purification with fragmented oil shale |
| 10/24/1978 | US4121661 Viscous oil recovery method |
| 10/24/1978 | CA1041022A1 Purging apparatus |
| 10/24/1978 | CA1040875A1 Joints for anchoring structures to the sea bed |
| 10/17/1978 | US4120362 Subsea station |
| 10/17/1978 | US4120359 Method for forming a non-dissoluble sand control pack and a sand control pack made thereby |
| 10/17/1978 | US4120358 Surfactant oil recovery method for use in high temperature formations containing water having high salinity and hardness |
| 10/17/1978 | US4120357 Method and apparatus for recovering viscous petroleum from thick tar sand |
| 10/17/1978 | US4120356 Well-cleaning process using viscosified surfactant solutions |
| 10/17/1978 | US4120355 Method for providing fluid communication for in situ shale retort |
| 10/17/1978 | US4120354 Determining the locus of a processing zone in an in situ oil shale retort by pressure monitoring |
| 10/17/1978 | US4120171 Apparatus and method of connecting a flexible line to a subsea station |
| 10/17/1978 | CA1040529A1 In situ combustion process for multi-stratum reservoirs |
| 10/17/1978 | CA1040527A1 Perforating apparatus and method |
| 10/17/1978 | CA1040409A1 Recovery of oil using microemulsions |
| 10/10/1978 | US4119491 Enzyme-filtration clarification of xanthan gum polymer solution |
| 10/10/1978 | US4119349 Underground oil-water separator |
| 10/10/1978 | US4119345 In situ oil shale retorting process using introduction of gas at an intermediate location |
| 10/10/1978 | US4119150 Injection and in situ curing of foamable resin, impermeable to solids |
| 10/10/1978 | US4119149 Recovering petroleum from subterranean formations |
| 10/10/1978 | US4119148 Perforating apparatus and method for well casing |
| 10/10/1978 | US4119145 Column structure enabling handling appliances on the seabed, particularly for the assembly and maintenance of well-heads |
| 10/10/1978 | CA1040096A1 Wellpoint jetting head |
| 10/10/1978 | CA1040094A1 Well stimulation |
| 10/03/1978 | US4118154 Hydraulically actuated pump assembly |
| 10/03/1978 | US4118071 Explosive expansion |
| 10/03/1978 | US4118070 Subterranean in situ oil shale retort and method for making and operating same |
| 10/03/1978 | CA1039522A1 Articulated joints for deep water installations |
| 10/03/1978 | CA1039492A1 Treatment of wells |
| 09/26/1978 | US4116488 In-situ mining method and apparatus |
| 09/26/1978 | US4116276 Method for increasing the recovery of natural gas from a geo-pressured aquifer |
| 09/26/1978 | US4116275 Recovery of hydrocarbons by in situ thermal extraction |
| 09/26/1978 | US4116273 Induction heating of coal in situ |