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:
Mar. 03, 1987
Filed:
Dec. 20, 1984
Applicant:
Inventor:
Milton E Goodhart, Houston, TX (US);
Assignee:
Hydril Company, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166303 ; 166 50 ; 166272 ; 166306 ; 175 61 ;
Abstract
A method for enhanced oil recovery from a subsurface earth formation is disclosed. At least one essentially upward deviated hole from a vertical shaft in the formation is formed. An outer loop borehole is formed in proximity with the deviated hole. A heating fluid is injected from the surface to the outer loop borehole to heat the formation in proximity with the upward deviated hole to facilitate drainage of oil and the like.