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:
Jun. 22, 1976
Filed:
Oct. 29, 1974
Applicant:
Inventors:
Karol L Hujsak, Tulsa, OK (US);
Thomas S Buxton, Calgary, CA;
Assignee:
Amoco Production Company, Tulsa, OK (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166269 ; 166303 ;
Abstract
A method of producing highly viscous oil from an underground formation penetrated by a well. Steam is injected through a first channel into the lower part of the formation. At the same time, previously recovered oil from the formation is injected through the well in a channel surrounding the steam channel to the upper part of the formation. This native oil insulates the formation from the steam and also serves to block the steam from rising in the formation. The heated oil can then be recovered from an adjacent well or injection can be stopped and the oil can be recovered from the well through which the fluid was injected.