The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 1979
Filed:
May. 11, 1978
Kenneth Porteous, Edmonton, CA;
William Lavender, Edmonton, CA;
Petro-Canada Exploration Inc., Calgary, CA;
Her Majesty the Queen in right of the Province of Alberta, Government of, , US;
Ontario Energy Corporation, Toronto, CA;
Imperial Oil Limited, Toronto, CA;
Canada-Cities Service, Ltd., Calgary, CA;
Gulf Oil Canada Limited, Toronto, CA;
Abstract
It has been found that tank-type air flotation cells are more efficient, when treating hot water process middlings containing in excess of about 3% bitumen, than trough-type air flotation cells. Also, it has been found that the trough-type cells are more efficient than the tank-type cells when treating middlings containing less than about 3% bitumen. Thus a secondary recovery circuit is proposed wherein the middlings are first treated in one or more tank-type cells in series and the underflow from the last tank-type cell is treated in one or more banks of trough-type cells.