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. 01, 2005
Filed:
Jan. 23, 2002
Oliver C. Mullins, Ridgefield, CT (US);
Donald Charles Mckeon, Paris, FR;
Felix Chen, Newtown, CT (US);
Xu Wu, Beijing, CN;
Elizabeth B. Dussan V, Ridgefield, CT (US);
Henning Groenzin, Lexington, MA (US);
Clelia Canuel, Paris, FR;
Oliver C. Mullins, Ridgefield, CT (US);
Donald Charles McKeon, Paris, FR;
Felix Chen, Newtown, CT (US);
Xu Wu, Beijing, CN;
Elizabeth B. Dussan V, Ridgefield, CT (US);
Henning Groenzin, Lexington, MA (US);
Clelia Canuel, Paris, FR;
Schlumberger Technology Corporation, Ridgefield, CT (US);
Abstract
Apparatus and methods for measuring oil flow velocity in a well are provided which utilize fluorescence quenching. A marker which quenches the natural fluorescence of crude oil is chosen and injected into the oil flow at a first location. At a second location, the oil flow is subjected to light at a wavelength which will cause oil to naturally fluoresce. The fluorescence signal is detected at the second location by a sensing probe. The time that it takes for the quenching marker to move from the first location to the second location is measured by sensing a decrease in fluorescence due to the quencher. Fluid velocity is determined by dividing the distance between the marker-ejection point and the optical probe position by the time it took the marker to move that distance.