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:
Jan. 08, 2013
Filed:
Jun. 20, 2012
Arthur H. Hartog, Martyr Worthy, GB;
J. Ernest Brown, Fort Collins, CO (US);
John Cook, Cambridge, GB;
Jonathan James Elphick, Cambridge, GB;
Paul Simon Hammond, Bourn, GB;
Ashley Bernard Johnson, Milton, GB;
Arthur H. Hartog, Martyr Worthy, GB;
J. Ernest Brown, Fort Collins, CO (US);
John Cook, Cambridge, GB;
Jonathan James Elphick, Cambridge, GB;
Paul Simon Hammond, Bourn, GB;
Ashley Bernard Johnson, Milton, GB;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
Acoustic monitoring is carried out using a fiber optic cable. Coherent Rayleigh noise generated by the transmission of a coherent beam of radiation through the fiber optic cable is detected, a phase of the coherent Rayleigh noise is measured and the measured phase is processed to identify an acoustic occurrence along the fiber optic cable. In certain aspects, an optical fiber serves as a distributed interferometer that may be used to monitor a conduit, wellbore or reservoir. The distributed interferometric monitoring provides for accurate detection of acoustic occurrences along the fiber optic cable and these acoustic occurrences may include fluid flow in a pipeline or wellbore, processes taking place in a wellbore or pipeline, fracturing, gravel packing, or production logging.