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6092600 |
Dual injection and lifting system using a rod driven progressive cavity pump and an electrical submersible pump and associate a method
The present invention relates to an apparatus and method for selectively lifting produced fluids, including produced hydrocarbons and a portion of produced water, to a ground surface while...
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6048462 |
Waste component removal from crude oil or gas
A method is provided of reducing an amount of a waste component present in a hydrocarbon fluid produced from an earth formation via a wellbore formed in the earth formation, the hydrocarbon fluid...
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6032737 |
Method and system for increasing oil production from an oil well producing a mixture of oil and gas
A method and system for increasing oil production from an oil well producing a mixture of oil and gas at an elevated pressure through a wellbore penetrating an oil-bearing formation containing an...
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5778977 |
Gravity concentrated carbon dioxide for process
This invention relates to the recovery of oil from an oil-bearing formation having a natural fracture network with substantial vertical communication and wherein gravity drainage is the primary...
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5769165 |
Method for increasing methane recovery from a subterranean coal formation by injection of tail gas from a hydrocarbon synthesis process
A method for increasing the production of methane from a subterranean coal formation penetrated by an injection well and a production well by producing methane from the coal formation via the...
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5676207 |
Soil vapor extraction system
A soil remediation system (10) for removing contaminants (11) from a contaminated area (12) located in the vadose zone (13) of the earth and comprising multiplicity of stratigraphic zones,...
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5641245 |
Apparatus for passive removal of subsurface contaminants
An apparatus is provided which passively removes contaminated gases from a subsurface. The apparatus includes a riser pipe extending into a subsurface which has an exterior end in fluid...
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5607016 |
Process and apparatus for the recovery of hydrocarbons from a reservoir of hydrocarbons
A method for the recovery of hydrocarbons from a reservoir of hydrocarbons including injecting a hydrocarbon solvent into the reservoir along with a displacement gas to mobilize hydrocarbons in the...
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5593248 |
Nontoxic chemical process for in situ permeability enhancement and accelerated decontamination of fine-grain subsurface sediments
The remediation of heterogeneous subsurfaces is extremely time consuming and expensive with current and developing technologies. Although such technologies can adequately remove contaminants in the...
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5584605 |
Enhanced in situ hydrocarbon removal from soil and groundwater
The invention encompasses a process and equipment for an aggressive approach to remediation of specific hydrocarbon contaminated soil and groundwater using horizontal sparging pipes in or below the...
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5520249 |
Process for the pretreatment of a natural gas containing hydrogen sulphide
A process is described for the pretreatment of a pressurized natural gas which is saturated with water and contains hydrocarbons and hydrogen sulfide (H 2 S) from a producing well. At least a...
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5450901 |
Apparatus and process for producing and reinjecting gas
An apparatus and process for separating and producing gas and liquid from a subterranean production zone via a well in fluid communication with the zone. After separation in the well, the gas is...
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5439054 |
Method for treating a mixture of gaseous fluids within a solid carbonaceous subterranean formation
A method for treating a mixture of gaseous fluids within a solid carbonaceous subterranean formation. In some embodiments, the invention provides for the disposal of a strongly adsorbing gaseous...
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5439594 |
Method for subsurface vapor extraction
Methods for vacuum extraction of contaminants from subsurface media which involves vacuum withdrawal through a conduit, of vaporized contaminant, assisted by a tube for allowing air bubbles to flow...
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5407009 |
Process and apparatus for the recovery of hydrocarbons from a hydrocarbon deposit
A method for the recovery of hydrocarbons from a hydrocarbon deposit overlying an aquifer, including injecting a hydrocarbon solvent in the vapour phase into the aquifer to mobilize hydrocarbons in...
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5402847 |
Coal bed methane recovery
A process for producing methane from a subterranean coal bed by continuously injecting a carbon dioxide-containing gas into the coal bed and recovering displaced and desorbed methane from a...
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5402848 |
Method and apparatus for conducting environmental procedures
A sparging well borehole has a single pipe extending downwardly in it. The lower end of the pipe terminates in the saturated zone and has orifices for discharging pressurized gas, usually air,...
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5401425 |
Recovering enhanced oil recovery surfactants by temperature cycling
A method for recovering surfactants from produced fluids by mixing with produced fluids about 0.1% to about 5% of a nonionic surfactant having a phase inversion temperature above the temperature of...
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5390740 |
Method and apparatus to recycle production well casing vapor
In a steam flood enhanced oil recovery operation, vapor and liquid in the casing annulus of the production wells is forwarded through a liquid separator with the thus separated vapor being...
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5388643 |
Coalbed methane recovery using pressure swing adsorption separation
A method is disclosed for using a pressure swing adsorption separator system to provide an oxygen-depleted gaseous effluent for injecting into a suitable solid carbonaceous subterranean formation,...
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5388642 |
Coalbed methane recovery using membrane separation of oxygen from air
A method of recovering methane from a solid carbonaceous subterranean formation having a production well in fluid communication with the formation and an injection well in fluid communication with...
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5336315 |
Soil stabilization process
This invention is concerned with a soil stabilization process in which soil particles comprising the soil surfaces to be stabilized are contacted or treated with an aqueous solution of an alkali...
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5261490 |
Method for dumping and disposing of carbon dioxide gas and apparatus therefor
A method for dumping carbon dioxide gas into the ground of the sea bottom comprises injecting carbon dioxide gas into the ground of the sea bottom to fix the carbon dioxide gas in the ground of the...
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5255740 |
Secondary recovery process
In accordance with illustrative embodiments of the present invention, a process for the secondary recovery of oil found in a dolomite formation includes generating in-situ decomposition of the...
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5133406 |
Generating oxygen-depleted air useful for increasing methane production
A method for generating oxygen-depleted air for injection into a subterranean coal seam for increasing production of methane. Air and produced fluids comprising methane are input into a fuel cell...
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5117907 |
Recovering hydrocarbons with a mixture of carbon dioxide and trichloroethane
The invention is a method of recovering petroleum hydrocarbons from an underground formation penetrated by at least one injection well and at least one production well, which comprises injecting...
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5099921 |
Recovery of methane from solid carbonaceous subterranean formations
A method of recovering methane from a solid carbonaceous subterranean formation by injecting a fluid that desorbs methane through at least one injection well into a subterranean formation and...
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5097903 |
Method for recovering intractable petroleum from subterranean formations
Many petroleum discoveries which have heretofore been regarded as intractable owing to the immobility of the petroleum can be economically recovered by a process involving local visbreaking of the...
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5085275 |
Process for conserving steam quality in deep steam injection wells
The degradation of steam quality due to heat losses prior to its injection into a heavy oil reservoir is reduced by a process utilizing the heat contained in a stream of reservoir fluids produced...
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5019279 |
Process for enriching a gas
A process for enriching a drive gas with intermediate hydrocarbon compounds to enhance the ability of the gas to mobilize hydrocarbons within a subterranean hydrocarbon-bearing formation. The drive...
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5014785 |
Methane production from carbonaceous subterranean formations
A method of producing methane by injecting inert gas, such as nitrogen, through an injection well into a solid carbonaceous subterranean formation (e.g., coal) and recovering methane from a...
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4992174 |
Fixed bed bioreactor remediation system
Disclosed is an apparatus and method for the continuous bioremediation of sites contaminated with a hazardous substance. The apparatus includes a subsurface pumping system, for removing the...
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4969520 |
Steam injection process for recovering heavy oil
A steam flood recovery process for recovering heavy oil from a producing formation wherein the production stream is processed to separate the produced water from the heavy oil and then the hardness...
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4948494 |
Removal of hydrogen sulfide from produced fluids
Hydrogen sulfide is removed from a water-in-oil emulsion by treatment of the emulsion with sulfur dioxide to convert the hydrogen sulfide to elemental sulfur. The elemental sulfur formed is...
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4945988 |
Apparatus and process for removing volatile contaminants from below ground level
A process for removing and disposing of or neutralizing volatile contaminants existing in the vadose zone of earth and also in a below ground aquifer. The process includes the injection of...
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4930574 |
Method for tertiary oil recovery from deep-well drill holes with utilization of the escaping petroleum gas
The process is of special interest to refinieries in the neighborhood of existing oilfields. The crude oil additionally released in the known manner by the introduction of hot water or steam...
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4890673 |
Method of removing volatile contaminants from contaminated earth strata
A method and apparatus of collecting volatile contaminants from a contaminated layer of earth. The apparatus is a closed-loop device which includes one or more contaminant withdrawal wells...
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4883122 |
Method of coalbed methane production
A method of producing coalbed methane by injecting inert gas, such as nitrogen, through an injection well into the coal seam and recovering coalbed methane from a production well(s). Methane...
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4866939 |
Method and apparatus for extracting geothermal fluid
A method and an apparatus for extracting geothermal fluid are disclosed. Pressurized and superheated steam is injected into a hot water region below the flashing point of the hot water in the well...
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4848460 |
Contained recovery of oily waste
A method is provided for recovering oily waste from oily waste accumulations underground comprising sweeping the oily waste accumulation with hot water to recover said oily waste, wherein said area...
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4832122 |
In-situ remediation system and method for contaminated groundwater
A system for removing volatile contaminants from a subsurface plume of contamination comprising two sets of wells, a well for injecting a fluid into a saturated zone on one side of the plume and an...
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4819724 |
Modified push/pull flood process for hydrocarbon recovery
The invention comprises injecting about 5% to about 25% pore volumes of a recovery fluid simultaneously into an underground formation through at least two wells. One well which is destined to be...
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4817715 |
Aqueous flooding methods for tertiary oil recovery
A method of aqueous flooding of subterranean oil bearing formation for tertiary oil recovery involves injecting through a well into the formation a low alkaline pH aqueous sodium bicarbonate...
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4793416 |
Organic crosslinking of polymers for CO2 flooding profile control
A process for recovering hydrocarbonaceous fluids from a formation having a substantially low pH where a rehealable gel prepared ex-situ is used to close off a zone of greater permeability. Said...
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4787452 |
Disposal of produced formation fines during oil recovery
Recovered formation fines are pumped in slurry form into an injection well during an enhanced oil recovery process e.g. a steam flood. Said injection can be done incrementally in stages in...
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4765407 |
Method of producing gas condensate and other reservoirs
A reservoir is produced by injecting a mixture of carbon dioxide and nitrogen produced by treatment of a Claus plant gaseous effluent stream into the reservoir to enhance production.
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4756367 |
Method for producing natural gas from a coal seam
Disclosed herein is a method of degasification, wherein gas and water production from a coal field are maintained at high rates regardless of temporary changes in market demand. While all the...
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4744417 |
Method for effectively handling CO.sub.2 -hydrocarbon gas mixture in a miscible CO.sub.2 flood for oil recovery
In a CO 2 miscible displacement enhanced oil recovery process, produced CO 2 -hydrocarbon gas containing from more than the maximum CO 2 content tolerable in a fuel gas up to about 70 volume...
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4741398 |
Hydraulic accumulator-compressor for geopressured enhanced oil recovery
A hydraulic accumulator-compressor vessel using geothermal brine under pressure as a piston to compress waste (CO 2 rich) gas is used in a system having a plurality of gas separators in tandem to...
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4730672 |
Method of removing and controlling volatile contaminants from the vadose layer of contaminated earth
A method and apparatus of collecting volatile contaminants from the vadose layer of earth. The apparatus is a closed-loop device which includes one or more contaminant withdrawal wells surrounded...
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