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| Number | Title | Issue Date |
| 7311468 | Process for the disposal of sulfur Process for the disposal of sulfur which comprises melting the sulfur, optionally in the presence of hydrogen sulfide, and injecting the molten sulfur into geological structures having a temperature ranging from 90 to 160° C. ... | 12/25/2007 |
| 7077198 | In situ recovery from a hydrocarbon containing formation using barriers A method is described for inhibiting migration of fluids into and/or out of a treatment area undergoing an in situ conversion process. Barriers in the formation proximate a treatment area may be used to inhibit migration of fluids. Inhibition of migration of fluids ... | 07/18/2006 |
| 7032660 | In situ thermal processing and inhibiting migration of fluids into or out of an in situ oil shale formation An oil shale formation may be treated using an in situ thermal process. Fluid migration into and/or out of a treatment area in the formation may be inhibited. In some embodiments, a barrier may be used to inhibit migration of fluids into and/or out of the treatment ... | 04/25/2006 |
| 6932121 | Method for offloading and storage of liquefied compressed natural gas A method for offloading and storage of liquefied compressed natural gas into a salt dome by using inserting displacement gas with a pressure greater than a pressure of the liquefied compressed natural gas and a temperature of from about 80 degrees Fahrenheit to abou... | 08/23/2005 |
| 6672798 | Sulfur storage system A system is provided for the storage and long-term conservation of commercially produced sulfur. An underground cavity is identified and selected from an earth formation such that its permeability and porosity allow sulfur to be retained within the cavity... | 01/06/2004 |
| 6582025 | Sulfur storage method A method and a system are provided for the storage and long-term conservation of commercially produced sulfur. An underground cavity is identified and selected from an earth formation such that its permeability and porosity allow sulfur to be retained wit... | 06/24/2003 |
| 6152356 | Hydraulic mining of tar sand bitumen with aggregate material A method and apparatus for the hydraulic removal of bitumen from a tar sand deposit comprises forming a borehole into the tar sand deposit and securing a casing into the borehole. Into the casing is inserted a mining tool having a water/diluent channel an... | 11/28/2000 |
| 5135286 | Residue recovery process and apparatus The recovery of materials from viscous bodies of petroleum residue and asphalt deposits which contain substantial quantities of the deposits by the use of an induced thermal gradient in a region of such a viscous body in which there is located a screw-lik... | 08/04/1992 |
| 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 underground formation to melt at least a portion of the sulfur, rem... | 09/26/1989 |
| 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 is in close proximity to a coal seam. A mixture of air, ste... | 10/11/1988 |
| 4670634 | In situ decontamination of spills and landfills by radio frequency heating A water-containing region at or near the surface of the earth, such as a landfill, that is contaminated with hazardous materials is decontaminated by heating the region with bound radio frequency energy from a bound-wave transmission line excitor array di... | 06/02/1987 |
| 4597609 | Method of melting sulphur A method of melting sulphur, in block form, uses a heating device having lower heating surfaces and means for withdrawing sulphur. The device is positioned on a block of sulphur so that the heating surface(s) are inclined downardly to a collection locatio... | 07/01/1986 |
| 4590348 | System for heating materials with electromagnetic waves A system for controlling microwave heaters in order to efficiently heat frozen ground. The heaters are energized and deenergized by a control unit in response to the temperature sensed a selected distance from a heater. The control unit also deenergizes t... | 05/20/1986 |
| 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, but not limited to, platinum-group metals and gold and sil... | 04/01/1986 |
| 4497635 | Sulfur remelting This invention is directed to a novel sulfur remelting method and an apparatus for employing the method. The method of remelting sulfur from a solid sulfur block may be comprised of generating super-heated liquid sulfur, spraying the super-heated liquid s... | 02/05/1985 |
| 4413859 | Mining of sulphur with foam barrier A method for mining subsurface deposits by injection of foam or a foaming agent plus air or other gas, or foam-making materials, into a selected porous zone above a sulphur bed or zone, and concomitantly displacing the gas and/or fluids occupying such por... | 11/08/1983 |
| 4249775 | Mining of sulphur A method of mining sulphur from an underground deposit overlying a soluble salt layer, wherein spaced parallel rows of repression boreholes and depression boreholes are drilled to penetrate into the salt layer, production boreholes are provided in a row i... | 02/10/1981 |
| 4241953 | Sulfur mine bleedwater reuse system A novel system is disclosed for utilizing, in the mining of subterranean sulfur by the Frasch process, the heat of water that has accumulated underground above at least a portion of the subterranean sulfur deposit from previous mining operations wherein t... | 12/30/1980 |
| 4218309 | Removal of sulfur from shale oil Crude shale oil produced by in situ retorting of oil shale can contain from about 1 to 2% sulfur by weight, the sulfur being distributed widely through the lower and higher boiling fractions of the shale oil. Substantially non-condensible sulfur containin... | 08/19/1980 |
| 4203625 | Apparatus for sulfur melting by lateral displacement of heating element An apparatus and a method for melting block sulphur employ a heating element pivotally mounted on a carriage on a trailer. The heating element is pivoted from a collapsed, transport position to an upright position, and a counterweight force is applied to ... | 05/20/1980 |
| 4196329 | Situ processing of organic ore bodies Apparatus for fracturing and/or heating subsurface formations wherein an alternating current electric field is produced in the frequency range between 100 kilohertz and 100 megahertz between electrodes spaced apart in the formation and a radio frequency g... | 04/01/1980 |
| 4171200 | Process and apparatus for in situ melting of sulphur from solid sulphur storage block This invention relates to a method and apparatus for the in situ melting and removal of liquid sulphur from a solid sulphur storage block. The method comprises supplying heat to the storage block sufficient to melt the sulphur of the storage block to prod... | 10/16/1979 |
| 4157847 | Method and apparatus for utilizing accumulated underground water in the mining of subterranean sulphur Novel method and apparatus for utilizing, in the mining of subterranean sulphur by the Frasch process, the heat of water that has accumulated underground above at least a part of said subterranean sulphur from previous mining operations comprising subterr... | 06/12/1979 |
| 4156545 | Process for heating and chemically treating an aqueous process fluid An integrated system and process is provided to heat and chemically treat an aqueous process fluid such as the water required for producing sulfur by the Frasch process without undue scaling and corrosion of apparatus when a sulfur-containing fuel such as... | 05/29/1979 |
| 4124253 | Sulfur well sealing method A method is disclosed for sealing a sulfur well wherein the well is made to discharge only sulfur and air instead of mixtures of sulfur, water and air. The method is used in conjunction with the Frasch mining technique when starting a new well for the fir... | 11/07/1978 |
| 4123107 | Integrated sulfur mining - sulfuric acid production system An integrated sulfur mining -- sulfuric acid production system is provided wherein a portion of the sulfur produced in the mining operation is consumed in a sulfuric acid manufacturing plant which also generates sufficient heat to raise the temperature of... | 10/31/1978 |
| 4059156 | Geothermal brine production There is disclosed a method for the production of geothermal brines that avoids depressuring the brine below its flash point in the well bore and thereby avoids the scaling and plugging unavoidably experienced whenever high salt content brines are depress... | 11/22/1977 |
| 4050740 | Method of and apparatus for melting block sulphur A method of, and apparatus for, melting block sulfur to avoid contamination of the environment by sulfur dust employ a heating element having a plurality of flow passages formed by pipe sections in a generally planar array, with a steam inlet and a conden... | 09/27/1977 |
| 3988036 | Electric induction heating of underground ore deposits A method of extracting metal from an underground ore body. The body is heated by electric induction to a temperature sufficient to break up the metallic ore compound and liquefy the metal. The metal flows into production wells where it is collected and tr... | 10/26/1976 |
