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:
Feb. 09, 1988
Filed:
Feb. 03, 1987
Applicant:
Inventor:
Mark A Plummer, Littleton, CO (US);
Assignee:
Marathon Oil Company, Findlay, OH (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166275 ;
Abstract
Plugging in fluid passageways of a subterranean hydrocarbon-bearing formation or associated production wells caused by the accumulation of insoluble salt precipitates therein which results from an in situ interaction between precipitate precursor ions in an injection water and resident ions already occurring in the formation is prevented by removing the precursor ions from the injection water by a reverse osmosis membrane before injecting the water into the formation.