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:
Jul. 17, 1990
Filed:
Jul. 28, 1988
Applicant:
Inventors:
Ahmad Dadgar, Lafayette, IN (US);
Charles C Shin, Lafayette, IN (US);
Assignee:
Great Lakes Chemical Corporation, West Lafayette, IN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; C09K / ;
U.S. Cl.
CPC ...
252-8551 ; 252-851 ; 252-8514 ; 252-8513 ; 252-8555 ;
Abstract
Clear high density fluids for use as completion, packing and perforation media in oil and gas well formations having high carbonate and/or high sulfate ion concentration are formulated from aqueous solutions of zinc bromide and one or more alkali metal bromides and have densities lying in the range of about 15.0 to 20.5 lb./gal and a pH lying in the range of about 1.0 to 5.5, with the alkali metal bromide being provided in an amount approaching its solubility limit in water.