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:
Dec. 12, 1989
Filed:
Oct. 09, 1987
Applicant:
Inventor:
William B Walton, Cleburne, TX (US);
Assignee:
GAF Corporation, Wayne, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
252-8552 ; 252-8553 ;
Abstract
A method for the removal of scale from the interior of producing oil and gas wells is disclosed. The method comprises introducing a mixture of an aqueous mineral acid, a mutual solvent, and an alkyl or aralkyl polyoxyalkylene phosphate ester to the interior of the well. The phosphate ester maintains the acid and mutual solvent in a micellar emulsion state. The mixture is retained in the well to allow the acid to solubilize the mineral deposits and then the mixture and solubilized mineral deposits are removed from the well interior.