1
Kohur N Sury: Low temperature bitumen recovery process. Esso Resources Canada, Arne I Fors, August 7, 1990: US04946597 (91 worldwide citation)

A low temperature process for separating bitumen from tarsands comprises slurrying tarsands in water at a temperature in the range of above about freezing to 35.degree. C., preferably in the range of 2.degree. to 15.degree. C., mixing said aqueous slurry with a conditioning agent for a time sufficie ...


2
Kenneth J Theimer, Michael McDonald, Gerald S Knoke, Raj Paul: Extendable/erectable arm assembly and method of borehole mining. ESSO Resources Canada, Seidel Gonda Lavorgna & Monaco, March 30, 1993: US05197783 (60 worldwide citation)

An extendable, retractable, erectable arm assembly for housing and supporting a water conduit extending outward from a tool located in a borehole, to a nozzle to produce a high pressure water cutting jet is provided. The arm assembly includes a plurality of interlocking arm segments for housing, sup ...


3
Robert N Tipman, Yi Cheng Long: Solvent process for bitumen separation from oil sands froth. Alberta Energy, Canadian Occidental Petroleum, Esso Resources Canada, Gulf Canada Resources, Her Majesty the Queen in right of Canada represented by the Minister of Natural Resources, HBOG Oil Sands, Pancanadian Petroleum, Petro Canada, Mocal Energy, Murphy Oil Company, Millen White Zelano & Branigan P C, March 2, 1999: US05876592 (59 worldwide citation)

A paraffinic solvent is mixed with bitumen froth containing water and solids. Sufficient solvent is added to induce inversion when the mixture is subjected to gravity or centrifugal forces. The emulsion reports to the water phase and a dry bitumen product is obtained.


4
Lubomyr M O Cymbalisty, George J Cymerman: Treatment of primary tailings and middlings from the hot water extraction process for recovering bitumen from tar sand. Alberta Energy Company, Canadian Occidental Petroleum, Esso Resources Canada, Gulf Canada, Her Majesty the Queen in right of Canada represented by the Minister of Energy and Natural Resources, HBOG Oil Sands, Pan Canadian Petroleum, Petro Canada, Ernest Peter Johnson, October 8, 1985: US04545892 (58 worldwide citation)

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 ...


5
George J Cymerman, Antony H S Leung, Waldemar B Maciejewski: Pipeline conditioning process for mined oil-sand. Alberta Energy Company, Canadian Occidental Petroleum, Esso Resources Canada, Gulf Canada Resources, Her Majesty the Queen in right of the Province of Alberta represented by the Minister of Energy and Natural Resources, HBOG Oil Sands Partnership, PanCanadian Petroleum, Petro Canada, Millen White Zelane & Branigan, November 23, 1993: US05264118 (55 worldwide citation)

As-mined, naturally water-wet oil sand is mixed at the mine site with hot water and NaOH to produce a slurry containing entrained air. The slurry is pumped through a pipeline and is fed directly to a conventional gravity separation vessel. The pipeline is of sufficient length so that, in the course ...


6
Anthony H S Leung, George J Cymerman, Waldemar B Maciejewski: Mixer circuit for oil sand. Alberta Energy Company, Canadian Occidental Petroleum, Esso Resources Canada, Gulf Canada Resources, Her Majesty the Queen in the right of the Province of Alberta, HBOG Oil Sands Partnership, PanCanadian Petroleum, Petro Canada, Millen White & Zelano, August 13, 1991: US05039227 (43 worldwide citation)

The mixer circuit comprises a vertically oriented, open-topped mixer vessel having a cylindrical side wall terminating with a shallow conical bottom. The bottom wall forms a central bottom outlet. Recycled slurry and fresh water streams are fed tangentially to the inner surface of the vessel, thereb ...


7
Kohur N Sury: Recovery of hydrocarbons from hydrocarbon contaminated sludge. Esso Resources Canada, Arne I Fors, September 7, 1993: US05242580 (41 worldwide citation)

A process is disclosed for the removal of hydrocarbons such as bitumen or heavy fuel oil from hydrocarbon contaminated sludge, or particulate solid material or the like non-homogenous material after appropriate conditioning, such as by ball milling, with the conditioned material being aerated and th ...


8
Gordon Lorenz, Ken Gehring: Skimmer apparatus for recovering bitumen. Petro Canada Exploration, Her Majesty the Queen in right of the Province of Alberta Government of the Province of Alberta Department of Energy and Natural Resources, PanCanadian Petroleum, Esso Resources Canada, Canada Cities Service, Gulf Canada Resources, Alberta Energy Company, Hudson s Bay Oil and Gas Company, Petrofina Canada, Millen & White, June 26, 1984: US04456536 (28 worldwide citation)

Bitumen, floating on tailings pond water in the form of a cohesive blanket, is recovered from the surface by an apparatus that takes advantage of the cohesiveness of the bitumen. A drum with radially attached prongs is partly submerged in the water and is rotated around its longitudinal axis so that ...


9
Antony H S Leung: Microbubble flotation process for the separation of bitumen from an oil sands slurry. Alberta Energy Company, Canadian Occidental Petroleum, Esso Resources Canada, Gulf Canada Resources, Her Majesty the Queen in right of the Province of Alberta represented by the Minister of Energy and Natural Resources, HBOG Oil Sands Partnership, PanCanadian Petroleum, Petro Canada, Ernest Peter Johnson, November 8, 1988: US04783268 (27 worldwide citation)

An improvement is provided to the known hot water process for extracting bitumen from mined oil sand. More particularly, a methodology is provided for the production of microbubbles of air, and it has been found that the so-produced microbubbles can be used in the primary flotation/settling step of ...


10
Leung Antony H S, Cymerman George J, Maciejewski Waldemar B: Malaxeur de sable bitumineux, Mixer circuit for oil sand. Alberta Energy Company, Canadian Occidental Petroleum, Esso Resources Canada, Gulf Canada Resources, Her Majesty The Queen In Right O, BENNETT JONES, November 8, 1994: CA2000984 (27 worldwide citation)

"MIXER CIRCUIT FOR OIL SAND" ABSTRACT OF THE DISCLOSURE The mixer circuit comprises a vertically oriented, open-topped mixer vessel having a cylindrical side wall terminating with a shallow conical bottom. The bottom wall forms a central bottom outlet. Recycled slurry and fresh water streams are fed ...