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:
Mar. 26, 1991
Filed:
Apr. 10, 1990
Applicant:
Inventors:
B L Carlberg, Ponca City, OK (US);
Nicholas O Wolf, Ponca City, OK (US);
Assignee:
Conoco Inc., Ponca City, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166279 ; 166300 ; 252-8552 ;
Abstract
Scaling of a production well in a non-carbonate subterranean reservoir is inhibited by injecting into the reservoir the water soluble surfactant metal salt containing a terminal metal ion which is adsorbed on the surfaces of the reservoir and thereafter injecting an inhibitor selected from the group consisting of phosphonates and polymeric carboxylates. The inhibitor reacts with the metal, precipitating as the metal phosphonate or polymeric carboxylate which slowly dissolves in production water to inhibit the formation of scale.