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:
Sep. 15, 1992
Filed:
Aug. 16, 1991
Applicant:
Inventor:
James M Paul, Dallas, TX (US);
Assignee:
Mobil Oil Corporation, Fairfax, VA (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166312 ; 134-3 ; 1663091 ; 252-8552 ;
Abstract
A method for removing calcium sulfate scale from a well comprising mixing carbon dioxide and water at a downhole location within the well to form an acidic solution containing an equilibrium mixture of carbonic acid, bicarbonate and carbonate ions that will convert the calcium sulfate scale to calcium carbonate scale and subsequent in situ dissolution of the calcium carbonate scale into the acidic solution that flows into the formation about the well.