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. 16, 2010
Filed:
Dec. 15, 2008
Xu Wu, Paris, FR;
Arthur Hartog, Winchester, GB;
Dimitri Cadere, St. Cyr l'Ecole, FR;
Tsutomu Yamate, Yokohama Kanagawa, JP;
Xu Wu, Paris, FR;
Arthur Hartog, Winchester, GB;
Dimitri Cadere, St. Cyr l'Ecole, FR;
Tsutomu Yamate, Yokohama Kanagawa, JP;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A device to measure a fluid pressure comprises a pressure sensing elementand a pressure readout element. The pressure sensing elementcomprises a cavitycapped by a flexible membrane, the cavity having a length d that varies with the fluid pressure Papplied on the flexible membrane. The pressure readout elementcomprises a light sourcefor providing an incident beam of a determined wavelength range directed towards the cavity and an optical spectral analyzerfor measuring a power spectrum of a return beam reflected by the cavity, and processing meansfor determining the cavity length d and the fluid pressure Pbased on the power spectrum.