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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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7556096 |
Varying heating in dawsonite zones in hydrocarbon containing formations
A method for treating an oil shale formation comprising dawsonite includes assessing a dawsonite composition of one or more zones in the formation. Heat from one or more heaters is provided to the...
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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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7100994 |
Producing hydrocarbons and non-hydrocarbon containing materials when treating a hydrocarbon containing formation
A method for treating a hydrocarbon containing formation is provided. In one embodiment, heat from one or more heaters may be provided to at least a portion of the formation. Heat may be allowed to...
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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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6679326 |
Pro-ecological mining system
The invention comprises a high pressure fluid barrier forming an enclosure boundary with respect to overburden and floor strata separated by one or more production strata containing desirable...
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6460936 |
Borehole mining tool
A borehole mining tool comprising a drill string having an inner pipe column and an outer pipe column. Water is forced under high pressure down an annulus between the outer pipe and inner pipe. A...
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6436154 |
Use of dodecylbenzene sulfonic acid or salt as a scale inhibitor
The formation of scale on equipment surface in contact with sodium alkali containing brines is inhibited by the addition of an alkylbenzene sulfonic acid or salt thereof to the brines.
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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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6193881 |
In-situ chemical reactor for recovery of metals or purification of salts
An in-situ reactor with hydrologic cells is provided to facilitate recovery of metals such as gold from rocks, or purification of salts such as potassium or magnesium chloride formed by evaporation...
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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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6035949 |
Methods for installing a well in a subterranean formation
This invention uses a combination of drilling, dissolving, and sinking to emplace a closed end well pipe into a salt formation. The well which results can be used to produce geothermal power or for...
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6022516 |
Method of reducing the formation of scale in the production of soda ash from trona and nahcolite ores
The methods for decreasing scale formation in processes for the production of soda ash from trona or nahcolite ores are provided. Diphosphonic acid materials such as 1-hydroxy-ethylidene...
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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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5988760 |
Process for hollowing out a cavity formed of a plurality of sub-cavities in a thin layer of salt
A process for hollowing out a cavity, by dissolution, in a ground formation comprising at least one layer containing predominantly salt, the process including the steps of drilling at least one...
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5770730 |
Synthesis of carbodimide analogs of chlorins and bacteriochlorins and their use for diagnosis and treatment of cancer
A method for the preparation of an imide derivative of purpurin by reacting hexylamine with a chlorin or bacteriochlorin having a macrocycle with a six-membered anhydride ring fused thereto, said...
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5709731 |
Slurry pipeline leaching method
A method for concurrently transporting and leaching metal values from an ore or concentrate containing said metal values from an originating site such as an elevated site to a delivery site...
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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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5669734 |
Process for making underground storage caverns
A new method for making large underground storage caverns in bedded or domal salt deposits for the storage of fluid materials in areas where solution mining water temperatures are low by a process...
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5588713 |
Process for making sodium bicarbonate from Nahcolite-rich solutions
A process for making sodium bicarbonate from Nahcolite-rich solutions utilizes solubility suppression with addition of salt. Hot water pumped into a Nahcolite-rich formation, which may contain salt...
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5523066 |
Treatment of lead sulphide bearing minerals
A process is described for solubilizing lead contained in ores mineralized with sulphidic minerals by in-situ leaching with an acetic acid and acetate containing solution in presence of an oxidant....
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5431483 |
Submarine solution mining containment and regulation cover and method
Oceanographic mining uses a flexible cover draped over a submarine ore-bearing stratum. The cover serves as a blanket-like structure for application of a leaching substance and isolation of the...
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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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5283054 |
Process for producing sodium salts from brines of sodium ores
A process for producing valuable sodium-based chemicals from a brine containing sodium carbonate and sodium bicarbonate, such as those containing from about 8% to about 20% total alkali obtained by...
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5238664 |
Soda ash production
Process for disposing of insoluble tailings that remain when solubilizing uncalcined or calcined trona in the process of producing soda ash, in which the tailings are slurried with water or waste...
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5199766 |
Cavity induced stimulation of coal degasification wells using solvents
An improved method for stimulating coal degasification wells comprising the use of a coal comminuting solvent to weaken the cleat structure of a coal seam immediately prior to use of high pressure...
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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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5004298 |
Method of rapidly abandoning large cavities washed-out in rock salt
After they have been washed out, cavities (4) in rock salt contain a large quantity of brine (8) at a temperature which is lower than the temperature of the surrounding formation (2). This means...
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4925247 |
Method for particle stabilization by use of cationic polymers
A method of increasing recovery of mineral and metals during in-situ chemical leaching of earth material by injection of a treating fluid which comprises cationic, organic polymers which are made...
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4923019 |
Thermochemical penetrator for ice and frozen soils
An apparatus and method are described for penetrating ice. The apparatus comprises: (a) a confined thermochemical reaction chamber having an inlet opening and an outlet opening and containing...
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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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4804485 |
Polyalkyleneoxyamine catalysts for dialkyl disulfides and/or polysulfides used in dissolving sulfur
A composition, useful for dissolving sulfur, which comprises a major amount of a disulfide or polysulfide and a catalyst comprising one or more polyalkyleneoxyamines or polyamines, and methods for...
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4776638 |
Method and apparatus for conversion of coal in situ
A method for the electro-thermal and electrochemical underground conversion of coal into oil and by-products comprises the steps of inserting an underground probe into a bore hole until the probe...
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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...
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4753485 |
Solution mining
A method for enhanced mineral recovery from a subsurface earth formation is disclosed. An outer loop borehole is formed from a vertical shaft. A leaching fluid is injected from the surface to the...
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4728447 |
Process and product for dissolving sulfur
A solvent for sulfur consisting of a dialkyl disulfide which is free of any basic substance. It is obtained from a commercial dialkyl disulfide by treatment with a reagent capable of eliminating or...
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4722832 |
Sulfur recovery process
A process for the recovery of sulfur from sulfur-bearing ores employing an aqueous leaching solution containing calcium monosulfide, calcium hydrosulfide or mixtures of such calcium sulfide...
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4718490 |
Creation of multiple sequential hydraulic fractures via hydraulic fracturing combined with controlled pulse fracturing
A process for sequentially fracturing a subterranean formation containing desired natural resources in which controlled pulse fracturing (CPF) is combined with hydraulic fracturing in the same...
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4666212 |
Metal value recovery
Metal values, particularly precious metal values, are recovered from fines on a footwall and in the fissures and cracks therein by passing a solution capable of solubilizing the metal values across...
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4652054 |
Solution mining of trona or nahcolite ore with electrodialytically-produced aqueous sodium hydroxide
A cyclic solution mining method that uses aqueous sodium hydroxide for recovering valuable alkali values, preferably as soda ash, from subterranean deposits of trona or nahcolite, even when such...
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4602820 |
Recovering metal values from geothermal brine
A process is provided for recovering valuable metals from geothermal brine comprising introducing donor metallic particles into a geothermal zone which is dominated with hot-pressurized geothermal...
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4589488 |
Method for recovery of mineral resources
A method for the recovery of mineral resources, such as metallic minerals, petroleum, etc., from solid materials, such as subsurface earth formations, including; partially burning a...
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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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4572582 |
Method of mining metals located in the earth
An earth battery which includes a first electrode which is a veined material located in the earth, a second electrode electrically connected to the surface of the earth and disposed in a hole which...
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