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:
Feb. 18, 1992
Filed:
Oct. 29, 1990
Applicant:
Inventors:
Bobby E Hall, Richmond, TX (US);
Clarita A Szememyei, The Woodlands, TX (US);
Assignee:
The Western Company of North America, Houston, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ; C09K / ;
U.S. Cl.
CPC ...
252-8551 ; 166300 ; 252-8554 ; 252-8553 ; 507131 ;
Abstract
A treatment fluid additive and method for treatment of subterranean formations to minimize formation permeability damage as a result of formation contact by the treatment fluid, wherein the fluid treatment additive is a formation control additive of the general formula: ##STR1## wherein R is independently a C.sub.1 to C.sub.4 alkyl, halogen and/or hydroxyl substituted alkyl and at least one R is a C.sub.1 to C.sub.4 halogen or hyroxyl substituted alkyl, and X.sup.- is selected from the group consisting of chloride, fluoride, bromide, iodide, nitrate, nitrite hydroxide, and sulfate.