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:
Jan. 02, 1996
Filed:
Feb. 16, 1993
Johnna E Oakley, Caney, KS (US);
Kelly B Fox, Bartlesville, OK (US);
Alvin Evans, Jr, Bartlesville, OK (US);
Wayne S Stewart, Bartlesville, OK (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
A process for increasing the viscosity of a zinc compound-containing brine which can be used for workover and completion fluids in oil field operations is provided. The process comprises contacting the zinc compound-containing brine with a polymer which comprises repeating units derived from an unsaturated amide having the formula of CH.sub.2 .dbd.CH--R--C(O)--NH.sub.2 and a vinylic sulfur compound selected from the group consisting of CH.sub.2 .dbd.CH--R'--SO.sub.3 M, CH.sub.2 .dbd.CH--R'--C(O)--N(H)--R''--SO.sub.2 M, and mixtures thereof; wherein M is selected from the group consisting of hydrogen, an alkali metal, and combinations thereof; and R is selected from the group consisting of hydrogen, a hydrocarbyl radical having from 1 to about 20 carbon atoms, and combinations thereof.