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| Number | Title | Issue Date |
| 7438501 | Ground freezing installation accommodating thermal contraction of metal feed pipes A ground freezing system includes a metal feed pipe for delivering refrigerant to the lower end of a freeze pipe installed in a bore in the ground. The feed pipe is supported on a compression spring which accommodates thermal contraction of the feed pipe while maint... | 10/21/2008 |
| 7435037 | Low temperature barriers with heat interceptor wells for in situ processes A system for reducing heat load applied to a frozen barrier by a heated formation is described. The system includes heat interceptor wells positioned between the heated formation and the frozen barrier. Fluid is positioned in the heat interceptor wells. Heat transfe... | 10/14/2008 |
| 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 |
| 7011167 | Device for sealing a drill hole and for discharging drillings or stripped extraction material In a device for sealing a bore hole and discharging drill cuttings and stripped excavation material, including a housing adapted to receive sealing elements and an opening capable of being connected to the bore hole, one side wall of the housing is provided with at ... | 03/14/2006 |
| 6976809 | Method of preventing frost heave stress concentrations in chilled buried pipelines A method for maintaining a stable soil by surrounding a chilled gas pipe with a material that has an antifreeze component that prevents the soil from freezing. By keeping the soil from freezing, it remains stable at all times. The method calls for excavating a trenc... | 12/20/2005 |
| 6854929 | Isolation of soil with a low temperature barrier prior to conductive thermal treatment of the soil Freeze wells may be used to isolate an area for soil remediation. Freeze wells may form a frozen barrier around a treatment area. The frozen barrier may inhibit fluid from entering into the treatment area. The frozen barrier may also inhibit migration of contaminati... | 02/15/2005 |
| 6679655 | Permafrost support system and method for vacuum-insulated pipe A system for supporting pipe within soil or fill material which minimizes positional disturbances of the pipe despite seasonal fluctuations in atmospheric temperature is provided. The system provides a length of double walled pipe, a support member placed... | 01/20/2004 |
| 6565724 | System and method for electrochemical stabilization of soil and the strengthened soil structure resulting from the above method A plurality of rows of wells are drilled in the soil of the area to be stabilized, and then pairs of electrodes, i.e., an aluminum anode and a copper-graphite cathode connected to a source of a bipolar pulse current, are inserted into each well in such a ... | 05/20/2003 |
| 6276873 | Ground water remediation control process A continuous process for removing organic contaminants from a subsurface formation. The process having the steps of: (a) treating the subsurface formation to mobilize the organic contaminants, such treating of the subsurface formation including withdrawin... | 08/21/2001 |
| 5944444 | Control system for draining, irrigating and heating an athletic field A control system for an athletic field coordinates drainage by gravity or vacuum-enhanced and irrigation by monitoring water level with respect to a subsurface membrane, wherein a flow network resides on the membrane and is covered by a fill layer, which ... | 08/31/1999 |
| 5842813 | Method of cold technology based irrigation of areas affected by aridity A method of a cold-technology-based irrigation of areas affected by aridity based on restoration of the energy balance (energothasis) of each unit area (square meter, acre, hectare, square kilometer, etc.) by utilizing imported external energy (electric t... | 12/01/1998 |
| 5804069 | Apparatus for extracting water from marine sediments A mesh enclosed container is provided to remove melt water from frozen blocks of contaminated sediment which has been extracted from a marine environment. The mesh enclosure has a number of porous wicking tubes for insertion into corresponding cavities in... | 09/08/1998 |
| 5730550 | Method for placement of a permeable remediation zone in situ A method for placement of remediation zones for treatment of contaminated groundwater in situ (10, 10A, 50, 60, 70, 80, 124) is described. The zones can be infiltrated or can be excavated and filled with a treatment composition to provide the remediation.... | 03/24/1998 |
| 5681130 | Active cooling-based surface confinement system for thermal soil treatment A thermal barrier is disclosed for surface confinement with active cooling to control subsurface pressures during thermal remediation of shallow (5-20 feet) underground contaminants. If steam injection is used for underground heating, the actively cooled ... | 10/28/1997 |
| 5667339 | Cryogenic method and system for remediating contaminataed earth An advancing freeze front is established in a porous region adjacent to or within contaminated earth. A flow of contaminated liquid phase water migrates toward the freeze front and a concentration of impurities is established in front of the advancing fre... | 09/16/1997 |
| 5660055 | Apparatus for extraction of marine sediments via freezing A freezing cell having one or more freezing tines may be used to remove contaminated sediment from the beds of water bodies. The freezing tines are to be immersed into the sediment. Refrigerant is supplied to the tines by a refrigeration unit during the f... | 08/26/1997 |
| 5636457 | Method of dredging via freezing and removing sediment A freezing cell having one or more freezing tines may be used to remove contaminated sediment from the beds of water bodies. The freezing tines are to be immersed into the sediment. Refrigerant is supplied to the tines by a refrigeration unit during the f... | 06/10/1997 |
| 5618134 | Self-refrigeration keel-type foundation system A self-refrigeration keel-type foundation system for supporting a structure, such as a building floor slab, hot or cold pipelines, bridging foundation and the like, above a permafrost earth strata located below the ground includes at least one and prefera... | 04/08/1997 |
| 5564862 | Method of improved landfill mining The present invention includes a method of landfill mining which comprises the following steps: (1) converting the landfill to aerobic production by injection of moisture and air, and a raw material such as sewage sludge (if required), and venting of depl... | 10/15/1996 |
| 5558779 | Method and apparatus for extracting water from marine sediments A mesh enclosed container is provided to remove melt water from frozen blocks of contaminated sediment which has been extracted from a marine environment. The mesh enclosure has a number of porous wicking tubes for insertion into corresponding cavities in... | 09/24/1996 |
| 5551799 | Cryogenic method and system for remediating contaminated earth An advancing freeze front is established in a porous region adjacent to or within contaminated earth. A flow of contaminated liquid phase water migrates toward the freeze front and a concentration of impurities is established in front of the advancing fre... | 09/03/1996 |
| 5476992 | In-situ remediation of contaminated heterogeneous soils A process for the in-situ remediation of a contaminated heterogeneous soil region comprising: (a) introducing material for treating contaminants in a contaminated heterogeneous soil region into at least one liquid permeable region within the contaminated ... | 12/19/1995 |
| 5441366 | Method and apparatus for compacting garbage dumps by means of depth vibration For a method for compacting garbage dumps (10) by means of depth vibration, which is carried out by means of at least one depth vibrator (4) and puts the dump mass (1, 2, 3) into vibration, one area after another, and compacts it in this way, with depth v... | 08/15/1995 |
| 5416257 | Open frozen barrier flow control and remediation of hazardous soil Treatment of flowable underground contaminants comprises freezing at least one open underground barrier volume to form a wall (10) near the contaminated region (12) in the ground (14), where the wall (10) is positioned to direct the contaminant flow (16) ... | 05/16/1995 |
| 5380127 | Non-entry method of underground excavation in weak or water bearing grounds A method of excavating an underground area liable to flooding or collapsing during excavation, wherein the area is susceptible to disaggregation by high pressure water jet and is located above rock of strength suitable for drifting a gallery comprises dri... | 01/10/1995 |
| 5345033 | Method for the neutralization of hazardous materials A method for neutralizing hazardous materials wherein the material and if applicable, the device within which such material is contained, is first cooled to substantially sub-ambient temperatures. The material is then safely extractable from such device a... | 09/06/1994 |
| 5339893 | Apparatus for containing toxic spills employing hybrid thermosyphons The present invention is directed to a hybrid thermosyphon which may be rapidly deployed to create a frozen soil barrier for containing toxic spills. In a particular embodiment, a plurality of thermosyphons are deployed for freezing the soil around and un... | 08/23/1994 |
| 5324137 | Cryogenic method and system for remediating contaminated earth An advancing freeze front is established in a porous region adjacent to or within contaminated earth. A flow of contaminated liquid phase water migrates toward the freeze front and a concentration of impurities is established in front of the advancing fre... | 06/28/1994 |
| 5261794 | Fluid pressure feeding apparatus A fluid pressure feeding apparatus for feeding cold water for cooling a mining pit into the pit and pumping water and muddy water heated within the mining pit onto the ground. A controller for switching a number of the operative chambers is provided to th... | 11/16/1993 |
| 5078544 | Arrangement for the changeover of liquids when transported by means of a three chamber tube feeder An arrangement for the changeover of mine or warm water and fresh or cold water in underground mining by a three chamber tube feeder with constant filling and discharge direction, which feeder is arranged between a high pressure liquid cycle, which forms ... | 01/07/1992 |
| 5055185 | Anti-freeze separator assembly This invention relates to an anti-freeze separator assembly connected to a piece of equipment in outdoor freezing conditions in order to take a fluid, such as water, and treat same for subsequent disposal without freezing. The anti-freeze separator assemb... | 10/08/1991 |
| 5054541 | Ground coil assembly A prefabricated ground coil assembly for use in association with a ground source heat pump comprises a flexible pipe configured as a double spiral. The outermost turns of the spiral are provided with an inlet connection and an outlet connection for heat e... | 10/08/1991 |
| 5050386 | Method and apparatus for containment of hazardous material migration in the earth A method and system is disclosed for reversibly establishing a closed, flow-impervious cryogenic barrier about a predetermined volume extending downward from a containment site on the surface of the Earth. An array of barrier boreholes extend downward fro... | 09/24/1991 |
| 4998848 | Method and apparatus for removing ground contaminants A method and apparatus for removing fluid contaminants from a solid material is described. In a preferred embodiment, a cylindrical container having openings in its surface through which contaminants in a gaseous state may enter is filled with cyro-adsorb... | 03/12/1991 |
| 4991998 | Mine cooling power recovery system A mine cooling power recovery system wherein a low-pressure slurry pump for charging the mud slurry produced in a mine into a pressure changeover feed chamber is arranged in parallel to a warm water charging low-pressure pump and each of outlets of the tw... | 02/12/1991 |
| 4974425 | Closed cryogenic barrier for containment of hazardous material migration in the earth A method and system is disclosed for reversibly establishing a closed, flow-impervious cryogenic barrier about a predetermined volume extending downward from a containment site on the surface of the Earth. An array of barrier boreholes extend downward fro... | 12/04/1990 |
| 4860544 | Closed cryogenic barrier for containment of hazardous material migration in the earth A method and system is disclosed for reversibly establishing a closed, flow-impervious cryogenic barrier about a predetermined volume extending downward from a containment site on the surface of the Earth. An array of barrier boreholes extend downward fro... | 08/29/1989 |
| 4836716 | Method and apparatus for piled foundation improvement through freezing using surface mounted refrigeration units A method and apparatus for increasing the load bearing capacity of tubular piles by freezing an area of soil surrounding the piles. A refrigeration unit is located on the surface of an offshore structure and circulates cold brine to an isolated section of... | 06/06/1989 |
| 4723876 | Method and apparatus for piled foundation improvement with freezing using down-hole refrigeration units The invention relates to a method and apparatus for increasing the capacity of a tubular driven pile. A refrigeration unit is lowered into the pile and grouted in place above a cement plug. The area between the refrigeration unit and the plug is filled wi... | 02/09/1988 |
