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:
Aug. 07, 2012
Filed:
May. 26, 2011
Applicants:
Dong Shen, Houston, TX (US);
Randall J. Perkins, Houston, TX (US);
Dwayne D. Schielke, Spring, TX (US);
David H. Shcolnik, Canonsburg, PA (US);
Inventors:
Dong Shen, Houston, TX (US);
Randall J. Perkins, Houston, TX (US);
Dwayne D. Schielke, Spring, TX (US);
David H. Shcolnik, Canonsburg, PA (US);
Assignee:
Baker Hughes Incorporated, Houston, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B 43/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a method of using threshold scale inhibitors of the formula: wherein n is 2 or 3 and M is hydrogen or an alkali metal cation, for preventing calcium carbonate, iron carbonate, and calcium sulfate scale formation in oilwell brines containing dissolved iron.