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:
May. 01, 2012
Filed:
Oct. 14, 2009
Emmanuel Desroques, Paris, FR;
Sophie Nazik Godefroy, Cairo, EG;
Anthony Robert Holmes Goodwin, Sugar land, TX (US);
Christopher Harrison, Auburndale, MA (US);
Kai Hsu, Sugar Land, TX (US);
Noriyuki Matsumoto, Yokohama, JP;
Emmanuel Desroques, Paris, FR;
Sophie Nazik Godefroy, Cairo, EG;
Anthony Robert Holmes Goodwin, Sugar land, TX (US);
Christopher Harrison, Auburndale, MA (US);
Kai Hsu, Sugar Land, TX (US);
Noriyuki Matsumoto, Yokohama, JP;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
Vibrating wire viscometers are disclosed. An example apparatus to determine the viscosity of a downhole fluid is described, the apparatus including a wire to be immersed in a downhole fluid, to vibrate when an alternating current is applied to the wire within a magnetic field, and to generate an electromotive force when vibrating within the magnetic field, the wire comprising a first resistance. The apparatus further includes a nulling circuit coupled to the wire, wherein the nulling circuit comprises a second resistance that is selectable to be substantially equal to the first resistance, and an analyzer coupled to the wire and the nulling circuit to determine the first resistance, the second resistance, and a viscosity of the downhole fluid based on the first and second resistances, at least one characteristic of the wire, and the electromotive force.