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:
Nov. 25, 2014
Filed:
Jun. 19, 2007
Applicant:
Helge Stray, Hagan, NO;
Inventor:
Helge Stray, Hagan, NO;
Assignee:
Restrack AS, Kjeller, NO;
Primary Examiner:
Int. Cl.
CPC ...
E21B 47/04 (2012.01); E21B 47/09 (2012.01); E21B 47/10 (2012.01); G01N 33/28 (2006.01); G01N 33/18 (2006.01);
U.S. Cl.
CPC ...
G01N 33/2823 (2013.01); G01N 33/1826 (2013.01);
Abstract
Biphenylmono- and polysulphonic acids and salts thereof, fluorenemono- and polysulphonic acids and salts thereof as well as p-terphenylmono- and polysulphonic acids and salts thereof may be used successfully as tracers for surveying, monitoring and/or measuring movements of aqueous fluids in aqueous and/or non-aqueous media. Said substances are especially suited for surveying or monitoring movements of fluids in oil wells or reservoirs as well as for fluid movements in hydrothermal reservoirs.