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Title | Date | Subject | Description |
| 26 |
 |
Method and apparatus for sampling a core of tar sand | 1983-02-08 | tar sand; core samples of tar sand; core sampling; patent | The invention provides a method and apparatus for sampling a frozen core of tar sand. The frozen core is first cut transversely along its length to form a pair of slabs of semi-circular cross-section. A longitudinal sample portion of substantially triangular cross-section is then cut from the centra... |
| 27 |
 |
Method for controlling flocculant addition to tar sand tailings | 1981-07-04 | flocculant addition to tar sand tailings; tar sand tailings; hot water extraction process; bitumen recovery; flocculation; vacuum filteration | The hot water extraction process for recovering bitumen from tar sand produces a large volume of solids-laden aqueous tailings as a waste product. The solids in the tailings stream may be flocculated by the addition of time and the components of the stream then separated into a water-free solids pha... |
| 28 |
 |
Arrangement for recovering viscous petroleum from thick tar sand | 1977-05-03 | Patent; Viscous oil; Tar sand; Petroleum; Recovering viscous petroleum; Large vertical dimension; Tubular member | An arrangement is provided for recovering viscous oil from a tar sand formation having a large vertical dimension including a substantially vertical lined shaft extending through the tar sand formation. A first opening is formed in the lower portion of the shaft lining and at least one lateral hole ... |
| 29 |
 |
Combination solvent-noncondensible gas injection method for recovering petroleum from viscous petroleum-containing formations including tar sand deposits | 1978-08-29 | Patent; Petroleum; Tar sand deposits; Petroleum recovery; Viscous petroleum-containing formations; Gas injection; Unreactive; Combination solvent-noncondensible gas injection method; Bitumen | Petroleum may be recovered from viscous petroleum-containing formations including tar sand deposits by injecting into the formation a solvent which is liquid at formation conditions and simultaneously therewith injecting a substance which will remain totally gaseous at the pressure and temperature c... |
| 30 |
 |
Bitumen recovery from tar sands | 1984-09-11 | Patent; Bitumen recovery; Tar sands; Kerosene; Flotation cell; Bitumen | A process for recovering bitumen from tar sands wherein the tar sands are pretreated with a diluent, such as kerosene in the preferred embodiment, to lower the viscosity of the bitumen such that it is in the range of about 5 to about 20 poise at the digestion temperature. The tar sands are then dige... |
| 31 |
 |
Method and apparatus for on-line monitoring of bitumen content in tar sand | 1984-02-21 | on-line monitoring of bitumen content; tar sand bitumen; tar sand; birumen content; bituminous sands processing; patent | An improvement in the processing of bituminous sands is described, whereby the concentration of bitumen in tar sand feed is measured by infrared light reflected from the tar sand surface. Near infrared is shone onto the surface of the incoming tar sand and reflected light is collected and passed thr... |
| 32 |
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Method and apparatus for producing tar sand deposits containing conductive layers | 1991-08-27 | producing tar sand deposits; tar sand deposits; conductive layers in tar sand deposits; patent; method for producing tar sand deposits; apparatus for producing tar sand deposits | An apparatus and method are disclosed for producing thick tar sand deposits by preheating of thin, relatively conductive layers which are a small fraction of the total thickness of a tar sand deposit, with horizontal electrodes. The preheating is continued until the viscosity of the tar in a thin pr... |
| 33 |
 |
Method and apparatus for recovering viscous petroleum from tar sand | 1981-02-03 | patent; viscous petroleum recovery; tar sand; recovering viscous petroleum from tar sand; deviated steam injection well; pumping wells; fluidized petroleum recovery | A method of recovering viscous petroleum from tar sand formations utilizing a deviated steam injection well with pump-down (through the flow line) completion. The steam injection well may use side pocket mandrels with constant flow or orifice regulators to control steam injection rates into the surr... |
| 34 |
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Method for controlling sand in thermal recovery of oil from tar sands | 1978-09-19 | controlling sand; thermal recovery of oil; tar sands oil recovery; tar sands; oil recovery; patent; oil production | A method is disclosed for producing oil from a subterranean reservoir of tar sands as unconsolidated oil bearing sands. The method comprises basically (1) setting a screen in an open hole, the screen being large enough to pass a majority of the formation sand and small enough to retain a packing mat... |
| 35 |
 |
Monitoring surfactant content to control hot water process for tar sand | 1991-04-23 | Patent; Hot water process; Tar sand; Extraction; Surfactants | The present invention is based on the following: (1) that when tar sand is conditioned and diluted in the hot water extraction process, there are two classes of anionic surfactants (originating from carboxylate and sulfonate groups) present in the process water; (2) that each of these surfactants ha... |
| 36 |
 |
Method of producing tar sand deposits containing conductive layers | 1990-05-22 | tar sand deposits; conductive layers; patent | A method is disclosed for producing thick tar sand deposits by preheating of thin, relatively conductive layers which are a small fraction of the total thickness of a tar sand deposit. The thin conductive layers serve to confine the heating within the tar sands to a thin zone adjacent to the conduct... |
| 37 |
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Method of removing bitumen from tar sand utilizing ultrasonic energy and stirring | 1977-10-18 | Bitumen removal; Tar sand; Ultrasonic energy; stirring; Bitumen recovery | A method of removing bitumen from tar sand for subsequent recovery of the bitumen. The method comprises contacting tar sand with an excess of solvent in which the bitumen is soluble, said contacting being performed within a vessel wherein simultaneously the solvent is being stirred and ultrasonic en... |
| 38 |
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Method of separating bitumen from tar sand with cold solvent | 1976-11-23 | Bitumen; Tar sand; Separation; Solvent extraction; Cold solvent | A method for separating bitumen from tar sand by solvent extraction with efficient separation of water from the recovered bitumen is disclosed. Tar sand may often be recovered by surface mining techniques. The tar sand is comprised of bitumen, water and sand including clays. The tar sand is contacte... |
| 39 |
 |
Method of removing bitumen from tar sand for subsequent recovery of the bitumen | 1977-10-18 | Bitumen removal; Tar sand; Bitumen recovery; Sonicating; Sand granules | A method of removing bitumen from tar sand for subsequent recovery of the bitumen. The method comprises submerging tar sand in a sufficient amount of a circulating solvent in which the bitumen is soluble, and, while the tar sand is so submerged, sonicating within the solvent with a sufficient amount... |
