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:
Aug. 21, 1979
Filed:
Mar. 13, 1978
Applicant:
Inventor:
Olaf M Stokke, Ponca City, OK (US);
Assignee:
Continental Oil Company, Ponca City, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12D / ; E21B / ;
U.S. Cl.
CPC ...
435262 ; 166246 ; 252 / ;
Abstract
In an enhanced recovery process involving flooding of subterranean formations with aqueous mixtures of biopolymers, filterability of the biopolymer is synergistically enhanced by treatment with ESPERASE.RTM. enzyme at a pH range of 12.5 to 13.0. The range is narrow and exclusive since pHs as high as 12.1 give poor results. The biopolymer can be any one containing debris which must be reduced by the enzyme.