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| Number | Title | Issue Date |
| 4398603 | Steam generation from low quality feedwater Steam is produced from low quality feedwater. A feedwater stream and a superheated steam stream are introduced into a contactor vessel where the superheated steam is contacted with the feedwater thereby producing saturated steam in the contactor vessel an... | 08/16/1983 |
| 4398604 | Method and apparatus for producing a high pressure thermal vapor stream A method and apparatus for producing a high pressure thermal vapor stream of water vapor and combustion gases for recovering heavy viscous petroleum from a subterranean formation, wherein the method includes directing high pressure combustion gases into a... | 08/16/1983 |
| 4397356 | High pressure combustor for generating steam downhole A catalytic combustor for generating a mixture of steam and combustion gas is located downhole in an oil well, so that the gas mixture can be injected directly into the oil reservoir to displace heavy oils from the reservoir. There can be a single stage o... | 08/09/1983 |
| 4393928 | Apparatus for use in rejuvenating oil wells A sub incorporating a check valve is connected into the lower end of a well pipestring. This valve will pass hot steam injected down the pipestring to the formations to loosen up the thick crude oil. The check valve prevents back flow and thus will hold t... | 07/19/1983 |
| 4387769 | Method for reducing the permeability of subterranean formations The present invention relates generally to the composition and method for reducing the permeability of subterranean formations penetrated by a wellbore. The composition of the present invention comprises a wellbore fluid having dispersed therein a fluid l... | 06/14/1983 |
| 4387016 | Method for extraction of bituminous material A process for separating and recovering bituminous material from tar sand and other viscous petroleum deposits, either in-situ or after mining the deposits. The process may also apply to heavy oil wells and to secondary and tertiary recovery of oil from w... | 06/07/1983 |
| 4385663 | Packerless well completion assembly A subsurface well bore completion assembly without convention inflatable or cup packer elements. The completion is effected by cementing a member having an internal sealing surface in place within the well then running tubing string terminating with a sea... | 05/31/1983 |
| 4380267 | Downhole steam generator having a downhole oxidant compressor Apparatus and method for generation of steam in a borehole for penetration into an earth formation wherein a downhole oxidant compressor is used to compress relatively low pressure (atmospheric) oxidant, such as air, to a relatively high pressure prior to... | 04/19/1983 |
| 4378846 | Enhanced oil recovery apparatus and method Apparatus for heating hydrocarbons, and the like, in an underground reservoir for the purpose of lowering the viscosity of the substance in the reservoir and facilitating the flow thereof has a flow channel arrangement disposable in a reservoir of the mat... | 04/05/1983 |
| 4372386 | Steam injection method and apparatus for recovery of oil A method and apparatus for recovering oil from an oil bearing formation utilizing steam injected into the formation. A working fluid is heated at the surface to produce a reversible, chemical reaction, particularly a reforming reaction in a reforming/meth... | 02/08/1983 |
| 4366860 | Downhole steam injector An improved downhole steam injector has an angled water orifice to swirl the water through the device for improved heat transfer before it is converted to steam. The injector also has a sloped diameter reduction in the steam chamber to throw water that co... | 01/04/1983 |
| 4362213 | Method of in situ oil extraction using hot solvent vapor injection Heavy oil or bitumen is extracted and removed from underground oil bearing formations having low permeability such as tar sands by injection of hot hydrocarbon solvent vapor into a single well hole at a pressure not substantially exceeding the pressure in... | 12/07/1982 |
| 4353417 | Method for producing a well in an unconsolidated formation A method for producing a well in an unconsolidated formation by forming a sand pack in the well by applying and maintaining a high positive pressure against the cavity walls to prevent cave-in and sloughing of the formation cavity walls until the sand pac... | 10/12/1982 |
| 4350203 | Well production system to prevent cave-in and sloughing in unconsolidated formations A well production system for controlling ingress and egress of high pressure fluid through the annuli formed between the well and a screen support tube internally thereof, and the screen support tube and an internal high pressure wash pipe with valves for... | 09/21/1982 |
| 4344488 | Charged aerosol petroleum recovery method and apparatus A system and a method for the tertiary removal of oil from a well by introducing a fine water mist, subjecting it to an electric field to form a charged aerosol and changing the aerosol into steam to drive oil from the formation.... | 08/17/1982 |
| 4342657 | Method for breaking petroleum emulsions and the like using thin film spreading agents comprising a polyether polyol The invention relates to a method of breaking petroleum emulsions, by utilization of a homogeneous, micellar solution of a water-insoluble thin film spreading agent comprising: (a) from between about 5% and about 75% by weight of a polyether polyol; (b) f... | 08/03/1982 |
| 4336839 | Direct firing downhole steam generator Direct firing downbole steam generator basically comprises an injector assembly axially connected with a combustion chamber. Downstream of the combustion chamber and oriented so as to receive its output is a heat exchanger wherein preheated water is injec... | 06/29/1982 |
| 4331202 | Method for recovery of hydrocarbon material from hydrocarbon material-bearing formations A method of heating a hydrocarbon material contained in a recovery zone in an underground hydrocarbon material-bearing formation to reduce the viscosity thereof for facilitating recovery of the hydrocarbon material, in which a gaseous penetration medium c... | 05/25/1982 |
| 4330037 | Well treating process for chemically heating and modifying a subterranean reservoir A portion of a subterranean oil and water-containing reservoir is concurrently chemically heated and selectively increased in its effective permeability to oil by injecting a solution of compounds containing ammonium ions and nitrite ions, which react exo... | 05/18/1982 |
| 4326985 | Micellar solutions of thin film spreading agents comprising an acylated polyether polyol The invention provides a homogeneous, micellar solution of a water-insoluble thin film spreading agent comprising: (a) from between about 5% and about 75% by weight of an acylated polyether polyol; (b) from between about 2% and about 30% by weight of a hy... | 04/27/1982 |
| 4326968 | Method for breaking petroleum emulsions and the like using micellar solutions of thin film spreading agents comprising polyepoxide condensates of resinous polyalkylene oxide adducts and polyether polyols The invention relates to the use of a homogeneous, micellar solution of a water-insoluble thin film spreading agent comprising polyepoxide condensates of resinous polyalkylene oxide adducts and polyether polyols for the breaking of petroleum emulsions, an... | 04/27/1982 |
| 4323124 | Method of inhibiting gravel pack and formation sandstone dissolution during steam injection A method of inhibiting dissolution of the gravel pack and/or erosion of the formation standstone in a well bore subject to water or steam injection. The method includes the addition of a material to the surface of the gravel or formation which is capable ... | 04/06/1982 |
| 4319635 | Method for enhanced oil recovery by geopressured waterflood The recovery of petroleum produced from an oil reservoir is enhanced by injecting water such as from a geopressured aquifer having a natural gas content at or near saturation at a temperature above 300° F. into the oil reservoir at a flow rate sufficient... | 03/16/1982 |
| 4316808 | Method for breaking petroleum emulsions and the like using micellar solutions of thin film spreading agents comprising an acylated polyether polyol The invention relates to the use of a homogeneous, micellar solution of a water-insoluble thin film spreading agent for the breaking of petroleum emulsions, and the like, comprising: (a) from between about 5% and about 75% by weight of an acylated polyeth... | 02/23/1982 |
| 4310049 | Crude oil desulfurization High sulfur crude oil is desulfurized by a low temperature (25°-80° C.) chlorinolysis at ambient pressure in the absence of organic solvent or diluent but in the presence of water (water/oil=0.3) followed by a water and caustic wash to remove sulfur and... | 01/12/1982 |
| 4306981 | Method for breaking petroleum emulsions and the like comprising resinous polyalkylene oxide adducts The invention relates to a method of breaking petroleum emulsions by utilization of a micellar solution of a water-insoluble thin film spreading agent, comprising: (a) from between about 5% and about 75% by weight of resinous polyalkylene oxide adducts; (... | 12/22/1981 |
| 4302051 | Open surface flotation method A method for the in situ separation of viscous crude oil from a reservoir such as, oil sand, or tar sand is disclosed. Hot water is introduced to the top surface of the reservoir while steam is injected into the reservoir through drill holes. The hot wate... | 11/24/1981 |
| 4299278 | Control system for well heating by steam In a control system for delivery of steam at a predetermined pressure to the head of an oil well for use in an open orifice bottom hole heater, a boiler, remote from the well head, is connected by a steam delivery line through a series of valves with a st... | 11/10/1981 |
| 4296814 | Method for thermally insulating wellbores Methods and apparatus for insulating a well bore to reduce heat transfer between fluids flowing through the well bore and surrounding formations wherein a heat activated gel-forming fluid having heat insulating properties when gelled is introduced into th... | 10/27/1981 |
| 4289204 | Solar heat treating of well fluids Methods and apparatus for treatment of crude oil and well fluids and equipment used in conducting the well fluids. Solar heating means are provided to heat the well fluids to improve the treatment qualities of the fluids. A solar heater is connected to an... | 09/15/1981 |
| 4285401 | Electric and hydraulic powered thermal stimulation and recovery system and method for subterranean wells A thermal recovery system for a subterranean well includes an electric heater located immediate the bottom of the well which cyclically receives electric power generated at the well surface. A pump directs a stream of pressurized fluid, such as water, thr... | 08/25/1981 |
| 4284139 | Process for stimulating and upgrading the oil production from a heavy oil reservoir A process for thermally stimulating and upgrading oil production from a heavy oil reservoir wherein the heavy oil produced from the reservoir is combined with a hydrogen donor diluent and the mixture is subjected to thermal cracking to upgrade the heavy o... | 08/18/1981 |
| 4282929 | Method of controlling scale in oil recovery operations Disclosed is a method of producing highly viscous minerals from a subterranean formation by injection of an acidic, thermal vapor stream without substantial scale buildup in downstream piping, pumps and well bore. The process comprises heating the formati... | 08/11/1981 |
| 4280559 | Method for producing heavy crude A process for the in situ recovery of viscous oil from a subterranean formation is disclosed. Steam is injected into the formation via a well, permitted to soak, and heated fluids including heated viscous oil are produced sufficient to create a substantia... | 07/28/1981 |
| 4279301 | Method for improving the effective permeability of formations A method to increase the effective permeability of a subterranean hydrocarbon-bearing formation employing a deviated well-drilling scheme and a fracturing technique.... | 07/21/1981 |
| 4276936 | Method of thermally insulating a wellbore A method of thermally insulating the borehole of a well in a thermal process for oil recovery by providing in the annular space between the casing and the well tubing a flowable, solid material having thermal insulating properties, such as vermiculite or ... | 07/07/1981 |
| 4268403 | Oil recovery using a dimethylamide in a fluid carrier A method for recovering oil from an oil-bearing formation which comprises introducing into said formation to induce displacement of the oil contained therein, a fluid carrier containing from about 0.25 to about 100 parts by weight of a N,N-dimethylamide o... | 05/19/1981 |
| 4262745 | Steam stimulation process for recovering heavy oil A method for steam stimulating a heavy oil reservoir which realizes significant energy savings is disclosed. Steam is injected into the reservoir via one well, permitted to soak and then produced back directly into the reservoir via a second well. This fl... | 04/21/1981 |
| 4257650 | Method for recovering subsurface earth substances This invention relates to methods and systems for recovering high viscosity oils, petroleum substances and other minerals from subsurface earth formations. In particular, one or more large diameter shaft holes are provided which preferably terminate in an... | 03/24/1981 |
| 4250964 | Process for recovering carbonaceous organic material from a subterranean formation A process for recovering carbonaceous organic material from a subterranean formation containing carbonaceous organic material which comprises introducing into the formation a cyclohexene or cyclohexadiene, maintaining contact between the carbonaceous orga... | 02/17/1981 |
