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Title | Date | Subject | Description |
| 1 |
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Use of a submersible viscometer in the primary separation step of the hot water process for recovery of bitumen from tar sand | 1987-01-20 | | |
| 2 |
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Treatment of primary tailings and middlings from the hot water extraction process for recovering bitumen from tar sand | 1985-10-08 | primary tailing treatment; primary middling treatment; hot water extraction process; bitumen recovery; tar sand | The primary tailings and middlings are combined and fed to a vessel having the general form of a deep cone thickener. The feed is deflected outwardly and generally horizontally by a baffle, as it is delivered to the vessel. Simultaneously, the outwardly radiating layer of newly added feed is contact... |
| 3 |
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Thermal drainage process for recovering hot water-swollen oil from a thick tar sand | 1987-05-26 | thermal drainage process; hot water-swollen oil recovery; thick tar sand; oil recovery | Hot liquid-containing water-swollen tar is produced from a tar sand by injecting steam into a well, which is at least initially open and substantially free of obstruction to vertical fluid flow throughout a long vertical interval from the bottom of the tar sand, by producing said liquid from the bot... |
| 4 |
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System for handling the underflow from a primary separation vessel in the tar sand hot water process | 1978-08-08 | patent; tar sand; hot water process; primary separation vessel; PSV; handling underflow | For operating control and safety, a variable-speed close-coupled pump is direct connected to the underflow of the primary separation vessel (PSV). The desired discharge density of the PSV is 70- 80% solids in order to minimize bitumen losses. For a good pumping system, the pump discharge density sho... |
| 5 |
 |
System for recovering viscous petroleum from thick tar sand | 1977-04-26 | viscous petroleum recovery; thick tar sand; patent | Recovery of viscous petroleum such as from thick tar sands is assisted using a closed-loop flow path formed in a well by concentric casing and tubular members extending from the earth's surface through a substantial portion of the formation for conducting hot fluid to reduce the viscosity of the pet... |
| 6 |
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Supercritical tar sand extraction | 1982-07-27 | tar sand extraction; tar sand; carbonaceous material recovery; supercritical extraction; carbonaceous material | An integrated process for the recovery of carbonaceous material from tar sands by supercritical extraction involving countercurrent flow of the tar sand and the solvent is disclosed. |
| 7 |
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Tar sand processing apparatus | 1976-04-20 | processing tar sand; tar sand; bitumen recovery; oil recovery; patent | Apparatus for processing tar sands to recover bitumen therefrom, and without the use of heat of steam, such apparatus including a processing tank having a concave, upwardly facing bottom constructed for receiving the upper flight of an endless conveyor thereat. Structure is provided for admitting ta... |
| 8 |
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Tar sand production using thermal stimulation | 1985-04-02 | tar sand production; thermal stimulation; hydrocarbon recovery; producing bitumen emulsion; tar sand; production of viscous hydrocarbons; heavy crude | Method and apparatus for recovering hydrocarbons from a subterranean formation in which a well completion, including a well liner, lies in a generally horizontal disposition within the hydrocarbon producing layer. The liner encloses conduit means for delivering a stream of a hot stimulating agent to... |
| 9 |
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Solvent extraction of tar sand | 1979-02-13 | solvent extraction process; tar sand; bitumen recovery | An extraction process for recovering bitumens from tar sands in which the tar sand is mixed with a hot hydrocarbon solvent, for example, toluene, in order to evaporate substantially all the water contained in the tar sands. The tar sands-solvent mixture is then separated into two phases of fine and ... |
| 10 |
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Simultaneous upgrading of tar sand bitumen and coal by corefining | 1988-08-16 | tar sands derived bitumen and coal liquification process; patent; tar sands | An improved tar sands derived bitumen and coal liquification process is disclosed wherein substantial percentages of subdivided coal particles and tar sands derived bitumen liquids are mixed and then corefined with hydrogen under hydrocracking conditions, but in the absence of a separate catalyst, a... |
| 11 |
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Solvent extraction process for recovering bitumen from tar sand | 1987-06-30 | solvent extraction process; bitumen recovery; tar sand; patent; direct solvent extraction; solvent bitumen recovery; residual bitumen | Bitumen recovered from tar sand by direct solvent extraction followed by washing of the sand tailings with countercurrent solvent flow and a solvent/aqueous phase separation step to recover solvent and residual bitumen. |
| 12 |
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Separation of bitumen from dry tar sands | 1978-10-17 | bitumen separation; bitumen recovery; dry tar sands | A process for the separation and recovery of bitumen from dry tar sands or sands with negligible quantities of connate water. The process includes comminuting the tar sands to an average particle size of approximately one centimeter in diameter and digesting the comminuted tar sand in a hot, aqueous... |
| 13 |
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Separation of solids from tar sands extract | 1978-06-13 | separations of solids; tar sands; tar sands extract; liquid promoter; patent | Solids are separated from a tar sands extract by gravity settling or centrifugation in the presence of a liquid promoter which promotes and enhances the separation of the solid material. The liquid promoter has a characterization factor of at least 9.75, a 5 volume percent distillation temperature o... |
| 14 |
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Recycle of secondary froth in the hot water process for extracting bitumen from tar sand | 1988-10-11 | hot water process; bitumen extration; tar sand; secondary froth recycling; patent | Froth, produced by induced air flotation in the hot water process circuit for extracting bitumen from tar sand, is recycled and added to the fresh slurry being introduced to the primary separation vessel. An increase in bitumen recovered as primary froth from the circuit is produced. |
| 15 |
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Recovery of petroleum from viscous asphaltic petroleum containing formations including tar sand deposits | 1977-08-16 | petroleum recovery; bitumen; tar sand deposits; patent; high asphaltic petroleum | Petroleum materials may be effectively recovered from subterranean, viscous, asphaltic or bituminous formations such as tar sand deposits by first injecting into the tar sand formation a paraffinic hydrocarbon at a temperature below 300.degree. F which precipitates asphaltic material from the asphal... |
| 16 |
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Recovering viscous petroleum from thick tar sand | 1976-11-30 | viscous petroleum recovery; thick tar sands; in situ | Recovery of viscous petroleum such as from thick tar sands is assisted using a closed-loop flow path from the earth's surface through a substantial portion of the formation for conducting hot fluid to reduce the viscosity of the petroleum in the formation to develop a potential passage in the format... |
| 17 |
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Recovering hydrocarbons from tar sand or heavy oil reservoirs | 1994-06-07 | hydrocarbon recovery; tar sand; heavy oil; underground tar sand reservoir; patent | Method of recovering fluids from an underground tar sand reservoir or heavy oil reservoir comprising (a) drilling and completing a first pair of wells and a second pair of wells, each pair comprising an injection well terminating in the reservoir and a production well terminating in the reservoir be... |
| 18 |
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Recovery of heavy crude oil or tar sand oil or bitumen from underground formations | 1992-09-08 | heavy crude oil; tar sand oil; bitumen; oil recovery; patent; underground formations | Heavy crude oil or tar sand oil or bitumen is recovered from an underground formation containing the same by introducing into said formation via an injection well or conduit a hot alkaline aqueous fluid so as to bring about the movement or migration or stripping of said heavy crude oil or tar sand o... |
| 19 |
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Recovery of bitumen from tar sand | 1981-02-10 | bitumen recovery; tar sand; patent | A process for recovering bitumen, or heavy petroleum, from admixture with sand and similar inorganic materials wherein said bitumen-sand mixture is mixed with an aqueous solution of an ammonium salt selected from ammonium sulfite, ammonium bisulfite and mixtures thereof to form a second mixture comp... |
| 20 |
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Recovery of heavy crude oil or tar sand oil or bitumen from underground formations | 1989-07-11 | heavy crude oil; tar sand oil; bitumen; oil recovery; underground formations; patent; bitumen production | Heavy crude oil or tar sand oil or bitumen is recovered from an underground formation containing the same by introducing into said formation via an injection well or conduit a hot alkaline aqueous fluid so as to bring about the movement or migration or stripping of said heavy crude oil or tar sand o... |
| 21 |
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Production of bitumen from a tar sand formation | 1976-05-25 | bitumen production; subterranean tar sand; patent | A method of producing bitumen from a subterranean tar sand formation while heating the formation via electrical conduction between a plurality of wells completed therein characterized by a plurality of steps. First, a high back pressure is maintained on the wells. Next, an immiscible fluid is inject... |
| 22 |
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Multiple drain method for recovering oil from tar sand | 2001-07-24 | Patent; Thermal method; Immobile hydrocarbon oil; Subsurface tar sand deposit; Bore holes | A thermal method is described for recovering normally immobile hydrocarbon oil from a subsurface tar sand deposit. The procedure comprises: (a) establishing at least one substantially vertical production bore hole extending from the surface of the earth to at least the bottom of said subsurface form... |
| 23 |
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Process for selective recovery of relatively metals-free bitumen from tar sand using a halogenated aliphatic solvent in combination with a second solvent | 1980-08-12 | selective recovery of tar sand bitumen; tar sand bitumen; two-solvent system; patent; metal-free bitumen | A process for the selective recovery of tar sand bitumen from tar sands using a two-solvent system comprising a halogenated aliphatic solvent in combination with a second solvent selected from an oxygenated compound. The process provides for an inexpensive method for selectively removing substantial... |
| 24 |
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Process for separating high viscosity bitumen from tar sands | 1984-12-04 | separating bitumen from tar sand; high viscosity bitumen; tar sand; bitumen recovery; patent | A novel process for separating high viscosity bitumen from tar sand. The process includes grinding the tar sand to obtain phase disengagement of the bitumen phase from the sand phase and thereafter using flotation techniques to obtain phase separation of the bitumen phase from the sand phase. Phase ... |
| 25 |
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Process to separate bituminous material from sand (tar sands) | 1982-08-03 | Bituminous sand; oil sand; tar sand; separate bituminous material from sand; bitumen separation | Bituminous sand such as oil sand or tar sand is mixed with a halogenated organic solvent which has a density greater than that of water at the same temperature. The slurry is continuously transferred to a conveyor system which is at least partially submerged in water, with the slurry being fed onto ... |
