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Class 166/256 - In situ combustion


Subclass of Class 166 - Wells
Definition: A process in which burning takes place underground in the
No. of patents: 146
Last issue date: 04/10/2012


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NumberTitleIssue Date
4089373Situ coal combustion heat recovery method
A method for recovery of heat generated by the combustion of coal in situ within coal seams in the earth. Three embodiments are described: one, in which the coal seam crops out and into which can be drilled and inserted a pipe, through the coal seam, to a...
05/16/1978
4089372Methods of fluidized production of coal in situ
A method of producing combustible gases, synthetic crude oils, coal chemicals and heat from coal in situ utilizes the combined teachings of in situ gasification, liquefaction and pyrolysis....
05/16/1978
4084637Method of producing viscous materials from subterranean formations
A method of producing viscous materials from subterranean formation comprises a plurality of steps. At least two wells are drilled and completed into the subterranean formation that contains the viscous material. At least one of the wells is completed as ...
04/18/1978
4083402Method of underground gasification of a coal bed
To control the process of underground gasification of a coal bed with due provisions for the natural geological and mining conditions, in the disclosed method the rate of gassing-out the coal bed is selected from the following expression: ##EQU1## ...
04/11/1978
4079585Method and apparatus for removing volatile fluids
A method and apparatus for the removal and recovery of volatile or evaporable substances from materials containing them. In other embodiments, the invention is readily applicable for the simultaneous incineration and concentration of such materials, parti...
03/21/1978
4079784Method for in situ combustion for enhanced thermal recovery of hydrocarbons from a well and ignition system therefor
A method for heating a well or for initiating an in situ combustion operation to recover petroleum from a well in a subterranean reservoir, a method for assembling an ignition system for the in situ combustion, and an ignition system comprises an elongate...
03/21/1978
4069867Cyclic flow underground coal gasification process
The present invention is directed to a method of in situ coal gasification for providing the product gas with an enriched concentration of carbon monoxide. The method is practiced by establishing a pair of combustion zones in spaced-apart boreholes within...
01/24/1978
4063416Steam generator
An apparatus and method of burning fossile fuels, such as coal, in their places of natural deposit, for producing energy which may be utilized for various purposes, such as, for driving an electric generator....
12/20/1977
4043393Extraction from underground coal deposits
A method of extracting hydrocarbons, energy and other products in situ from an underground coal deposit. A selected part of the coal deposit is heated by electrical induction to temperatures high enough to effect the destructive distillation of coal. The ...
08/23/1977
4036298Method of connection of wells by in-situ combustion
A method of mine-less connection of wells for underground gasification by the filtrational fire connecting technique is intended primarily for forming a single unitary gasification channel for underground gasification of coal, oil shale and oil-bearing be...
07/19/1977
4029360Method of recovering oil and water from in situ oil shale retort flue gas
A technique is described for reducing the content of oil and water in the flue gas recovered from the bottom of an underground in situ oil shale retort. In such a retort air is passed downwardly to sustain a combustion zone for retorting oil which is reco...
06/14/1977
4024915Recovery of viscous oil by unheated air injection, followed by in situ combustion
Disclosed is a method for recovering low gravity, viscous petroleum including bitumen from a tar sand deposit by injecting unheated air followed by a soak period so that the viscous petroleum is conditioned by contact with the unheated air, followed by in...
05/24/1977
4024914Method of processing coal channels in underground coal gasification
A method of processing recently bored channels when putting into operation an underground gas generator (underground gasifier), consisting, on the one hand, in forced air blowing and, on the other hand, in taking away hot gases, is characterized by determ...
05/24/1977
4022511Recovery of liquid and gaseous products from an in situ oil shale retort
An in situ oil shale retort is provided with a retort off gas cooling zone in the in situ retort at the product outlet end of the in situ retort. The kerogen in the in situ retort is converted to liquid and gaseous products by moving a heated gas through ...
05/10/1977
4022279Formation conditioning process and system
According to the invention, a process and system are disclosed for conditioning an oil or gas formation and the application of the various stimulating fluids to the oil or gas formation. The method consists of drilling from a vertical well hole a horizont...
05/10/1977
4014575System for fuel and products of oil shale retort
An underground room in substantially undisturbed shale is filled with fragmented oil shale particles for in situ retorting. A comprehensive system is provided for feeding air to the top of the retort and recovering oil and flue gas from the bottom of the ...
03/29/1977
4008762Extraction of hydrocarbons in situ from underground hydrocarbon deposits
A method of extracting hydrocarbons in situ from an underground hydrocarbon deposit such as oil shale. A selected part of the deposit is heated by one or more electrical induction coils arranged in a quasi-toroidal configuration to temperatures high enoug...
02/22/1977
3997005Method for control of subsurface coal gasification
The burn front in an in situ underground coal gasification operation is controlled by utilizing at least two parallel groups of vertical bore holes disposed in the coalbed at spaced-apart locations in planes orthogonal to the plane of maximum permeability...
12/14/1976
3987851Serially burning and pyrolyzing to produce shale oil from a subterranean oil shale
A process for producing shale oil by circulating hot fluid through a rubble-containing cavern within a subterranean oil shale which contains water-soluble mineral is improved by burning a carbonaceous residue left within one cavity to produce hot fluid fo...
10/26/1976
3980137Steam injector apparatus for wells
An apparatus and method for injecting pressurized fluid into a well are disclosed. The apparatus to inject pressurized fluid into a well comprises a combustion chamber, having a coolant jacket positioned to circulate coolant over outer walls of the combus...
09/14/1976
3972372Exraction of hydrocarbons in situ from underground hydrocarbon deposits
A method of extracting hydrocarbons in situ from an underground hydrocarbon deposit (such as petroleum or lignite). A selected part of the deposit is heated by electrical induction to temperatures high enough to drive off hydrocarbon fractions as gases or...
08/03/1976
3964545Processes for secondarily recovering oil
A secondary recovery process using injected air to pressurize the formation and maintain mobility of the reservoir oil by diluting the oil with carbon dioxide. Carbon dioxide is produced as a by-product of air injection, either by auto-oxidation of carbon...
06/22/1976
3952801Method for igniting oil shale retort
A technique is described for igniting the oil shale rubble pile in an in situ oil shale retort. A gas-air burner is lowered through a hole to a plenum over the oil shale to be ignited. An excess of air is passed through the hole and around the burner so t...
04/27/1976
3950029In situ retorting of oil shale
An in situ retorting method and system for recovering hydrocarbons from an oil shale deposit. A retorting zone is formed in the deposit and is comprised of at least two galleries which are separated by a barrier of oil shale thick enough to prevent leakag...
04/13/1976
3946808Process for recovering hydrocarbons from a subterranean reservoir by in situ combustion
A method for operating an in situ combustion process in a petroleum containing reservoir wherein a plurality of air injection wells are spaced so that the approximate distance between the wells will be twice the distance at which the flux of air to the bu...
03/30/1976
3933447Underground gasification of coal
There is disclosed a method for the gasification of coal in situ which comprises drilling at least one well or borehole from the earth's surface so that the well or borehole enters the coalbed or seam horizontally and intersects the coalbed in a direction...
01/20/1976
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