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:
Nov. 01, 1994
Filed:
Jun. 29, 1993
Applicant:
Inventor:
David O Falk, Denver, CO (US);
Assignee:
Marathon Oil Company, Findlay, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ; C02F / ;
U.S. Cl.
CPC ...
166250 ; 166279 ; 166310 ; 166371 ; 210698 ; 210701 ; 252-8552 ;
Abstract
A copolymer of sodium vinyl sulfonate and polyalkylene glycol mono- or di-methacrylate and a process for inhibiting scale deposition, particularly inorganic sulfate such as barium sulfate. An aqueous fluid present in or produced from a subterranean formation is contacted with an aqueous solution having the copolymer dissolved therein. The aqueous fluid has an acidic pH and the copolymer has a molecular weight of from about 2,000 to about 30,000.