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8057765 |
Methods for constructing underground borehole configurations and related solution mining methods
Disclosed are methods for solution mining of evaporite minerals, such as trona, comprising drilling an access well and at least two lateral boreholes; injecting a fluid; circulating the fluid...
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8021461 |
Remedial heap treatment
A system and method are disclosed for improving component extraction from heap leach operations. Following heap leaching for some time, portions of the heap deficient in component extraction are...
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7857396 |
Method and system for solution mining
A relatively warm mineral deposit is solution mined by injecting fluid through a well drilled into the deposit and dissolving the mineral to form a production brine. Warm production brine is cooled...
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7735935 |
In situ thermal processing of an oil shale formation containing carbonate minerals
A method of treating an oil shale formation in situ includes providing heat directly from one or more heaters to at least a portion of the formation. The heat is controlled to maintain an average...
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7638109 |
Production of sodium sesquicarbonate and sodium carbonate monohydrate
A process for the production and recovery of crystalline sodium sesquicarbonate and of crystalline sodium carbonate monohydrate from aqueous liquors containing sodium carbonate and sodium...
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7611208 |
Methods for constructing underground borehole configurations and related solution mining methods
Disclosed are methods for solution mining of evaporite minerals, such as trona, comprising drilling an access well and at least two lateral boreholes; injecting a fluid; circulating the fluid...
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7559368 |
Solution mining systems and methods for treating hydrocarbon containing formations
A method for treating an oil shale formation comprising nahcolite is disclosed. The method includes providing a first fluid to a portion of the formation through at least two injection wells. A...
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7556095 |
Solution mining dawsonite from hydrocarbon containing formations with a chelating agent
A method for treating an oil shale formation comprising dawsonite includes providing heat from one or more heaters to the formation to heat the formation. Hydrocarbon fluids are produced from the...
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7549470 |
Solution mining and heating by oxidation for treating hydrocarbon containing formations
A method for treating an oil shale formation comprising nahcolite includes providing a first fluid to a portion of the formation. A second fluid is produced from the portion. The second fluid...
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7410627 |
Sodium carbonate and sodium bicarbonate production
A method for solution mining nahcolite, capable of extracting nahcolite from geological formations lean in nahcolite comprising injecting high pressure water (which may include recycled aqueous...
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6997518 |
In situ thermal processing and solution mining of an oil shale formation
An oil shale formation may be treated using an in situ thermal process. Heat may be provided to the treatment area. Fluids may be injected into the formation to remove a component within the...
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6251346 |
Solution mining of carbonate/bicarbonate deposits to produce soda ash
A solution mining process for recovering sodium values from an underground deposit of a sodium bicarbonate containing ore is disclosed. The process involves contacting the ore with an aqueous...
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6164727 |
Method of mining a soluble mineral
For use in a field having a plurality of interspersed injection and production wells that extend to a mineral bearing formation, a system for extracting the mineral from the formation having a jet...
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6022080 |
Process and system for the solution mining of evaporites and preparation of saline solutions
A process and a system for the solution mining of evaporites and preparation of the obtained saline solution and in particular for the dissolution of salts, evaporation and cooling of the obtained...
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5957539 |
Process for excavating a cavity in a thin salt layer
The invention concerns a process for excavating by dissolution an underground cavity in a thin salt layer, in order to store a fluid therein. According to the invention, the process includes the...
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5826653 |
Phased array approach to retrieve gases, liquids, or solids from subaqueous geologic or man-made formations
A method of enhancing the remediation of contaminated soils and ground water, production of oil and gas, and production of any solid, gas, and/or liquid from subsurface geologic and man-made...
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5823631 |
Slurrified reservoir hydrocarbon recovery process
Hydrocarbons trapped in solid media, such as bitumen in tar sands may be recovered from deep formations by relieving the stress of the overburden and causing the formation to flow from an injection...
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5690390 |
Process for solution mining underground evaporite ore formations such as trona
A process is described for solution mining isolated, mechanically mined-out areas of soluble evaporite ore to recover remaining ore reserves, wherein the mined-out areas are separated from an...
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5683490 |
Solution mining of precious metals using aqueous, sulfur-bearing solutions at elevated temperatures
Metallic forms of gold and other precious metals can be dissolved and transported (mined) using an aqueous sulfide-bearing leach solution. Maximum sulfur fugacities are achieved in sulfide-bearing...
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5431482 |
Horizontal natural gas storage caverns and methods for producing same
The invention provides caverns and methods for producing caverns in bedded salt deposits for the storage of materials that are not solvents for salt. The contemplated salt deposits are of the...
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5246273 |
Method and apparatus for solution mining
Evaporite mineral solution mining process and apparatus comprising the steps of undercutting a bed or massive deposit by in-air jetting with an aqueous solution followed by solution mining of the...
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5135734 |
Process for removing a residue containing sodium sulphate
Process for removing an industrial residue containing sodium sulphate, in which the sodium sulphate in the residue 7 is treated with a calcium salt 12 to precipitate calcium sulphate 13, which is...
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5072990 |
Acceleration of hydrocarbon gas production from coal beds
A hot fluid is injected through an injection well into a coal seam to induce more rapid and complete desorption of methane therefrom and to cause desorbed methane to proceed toward a nearby...
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4966416 |
Fragmentation of an underground ore body
The invention provides a process for converting subterraneous ore overlain by an adjacent formation of porous rock into an enclosed zone of fragmented ore by first blasting a void space in the...
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4953914 |
Mining machine with roof bolting apparatus
A mining machine includes a frame with a material dislodging head mounted on the end of the frame. Ground engaging tracks propel the machine within a mine along the floor of the mine to advance the...
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4869555 |
Apparatus for recovery of sulfur
Elemental sulfur in substantially pure form is recovered from an underground sulfur formation which has been previously been mined by the Frasch process by injection of hot water into the...
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4858689 |
Coal gasification well drilling process
An in-situ coal gasification process for practice on a formation having one or more dipping coal seams that involves, directionally drilling a production wellbore into a burn module designated in...
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H000614 |
Method to connect drill holes utilizing signalling devices
This is a method to connect two or more drill holes, such as drill holes at distances of 2,000 to 5,000 feet or more apart, for the purpose of producing soluble ores, such as sylvanite or...
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4815791 |
Bedded mineral extraction process
Process for obtaining increased yields of minerals from bedded ore desposits in the absence of natural confining beds, by confining the flow of leach solution to the mineralized zone through...
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4815790 |
Nahcolite solution mining process
Nahcolite solution mining process comprising drilling at least one well into a Nahcolite bed, circulating hot barren aqueous liquor in a cavity in said Nahcolite bed for a time sufficient to...
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4756887 |
Process of heap leaching
The present invention relates to a new process of heap leaching and comprises the following steps: (a) preparing the ground to receive the heap; (b) forming the heap; (c) sinking injection wells...
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4712616 |
Method for scale reduction in off-shore platforms
A process for reducing scale formation in off-shore production platforms where sea water is used as a water-flooding medium. During production, sea water and connate water interact to make scale...
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4634187 |
Method of in-situ leaching of ores
A method of in-situ leaching is disclosed in which the ore body is incapsulated by impermeable barriers. A grid of injection and production wells are drilled into the ore body. Horizontal barriers...
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4630868 |
Process for solution mining
The present invention embodies an improved method for the in situ mining of low to impermeable minerals to sweep out sections of deposits beneath the surface of the earth. Practicing the method of...
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4586752 |
Solution mining process
A solution mining process for recovering mineral values from a subterranean mineral-bearing formation, which includes (1) a first injection-and-production phase during which a leaching solution is...
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4579391 |
Method of electric smelting to matte in situ
A method of extraction of metallic sulfides (Matte) from an ore deposit in situ. The contained sulfides are smelted by resistor induced heat creating a matte containing precious metals, including,...
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4575154 |
In situ leach method
A method for the in situ leaching of a subterranean mineral (e.g. uranium) deposit which permits the use of downflow ion exchange columns without requiring expensive filtration equipment to remove...
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4572581 |
In-situ recovery of mineral values
Mineral values, particularly uranium, are recovered from subsurface earth formations containing the same, as well as cations which form precipitates with sulfuric acid leach solutions, by injecting...
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4561696 |
In situ recovery of mineral values
Mineral values, particularly uranium, are recovered "in situ" from a subsurface earth formation by completing at least one well in the mineralized formation adjacent either the top or the bottom of...
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4547019 |
In-situ recovery of mineral values with sulfuric acid
In accordance with the present invention, mineral values are recovered from subsurface earth formations containing the same as well as calcium-containing materials by injecting into at least one...
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4545620 |
Process for the recovery of a mineral
The present invention relates to an improved process for the solution mining of a mineral from a subterranean formation. More specifically, the invention relates to an improved process which...
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4544206 |
Slug-type in situ recovery of mineral values
Mineral values, particularly uranium, are recovered in situ from a heterogeneous subsurface earth formation containing the mineral values, which formation comprises zones of both high and low...
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4536034 |
Method for immobilizing contaminants in previously leached ores
This invention relates to a process for reducing to environmentally acceptable levels the amount of soluble or mobile contaminants in formations that have been subjected to in situ leaching to...
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4499949 |
Combined surface and in situ tar sand bitumen production
In-situ combustion of tar sand formations is improved by introducing into an unminable tar sand formation prior to initiation of in-situ combustion hydrogen sulfide produced from upgrading tar...
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4498705 |
Method and apparatus for in-situ mining by leaching ores containing metal values
An oxygenated lixiviant is transported down an injection pipe into the leach zone at the bottom of an injection pipe, the lixiviant leaches the ore and the pregnant lixiviant containing metal...
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4491367 |
Method for subterranean generation of heat as a source of energy
Subterranean generation of heat as a source of energy optionally accompanied by the production of minerals. In subterranean formations of minerals that are capable of undergoing an enthalpic...
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4489042 |
Process for recovery of mineral values from subterranean formations
The present invention relates to the in situ recovery of mineral values, particularly uranium, from subterranean formations that contain sulfur in organic or inorganic forms where the sulfur causes...
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4486390 |
Regeneration of polythionate poisoned ion exchange resins used in uranium recovery
A process is described for the recovery of uranium from ore wherein the ore is leached, the resulting leachate is passed over an anion exchange resin, and the resin is then eluted with an elution...
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4475771 |
Cyclic solution mining of borate ores
A method of recovering boric acid from a subterranean deposit of colemanite ore by solution mining, comprises: supplying a leach solution comprising hydrochloric acid to the subterranean deposit...
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4474408 |
Method for removing ammonium ions from a subterranean formation
The ammonium ions in a subterranean clay-containing formation may be removed by flushing the formation with a calcium ion containing restoration fluid having substantially the highest pH effective...
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