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:
May. 18, 1993
Filed:
Feb. 13, 1992
Applicant:
Inventors:
Todd R Thomas, Coroapolis, PA (US);
Kevin W Smith, McMurray, PA (US);
Assignee:
Clearwater, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166308 ; 1663051 ; 252-8551 ;
Abstract
Moulding and migration of subterranean clay is inhibited during stimulation of the production of hydrocarbon fluids, and preparation therefor, by treating said formations with a compound of the formula (CH.sub.2 .dbd.CH-CH.sub.2).sub.n N+(CH.sub.3).sub.4-n X.sup.- where X may be any anion which does not adversely react with the formation or treatment fluid and n is an integer from 1 to 4.