公开(公告)号：EP2766745A4

公开(公告)日：2015-06-03

申请号：EP12839438

申请日：2012-09-07

Applicant: BAKER HUGHES INC

Inventor： BARRY ALEXANDER M ,  DUNCAN ROGER GLEN ,  CHILDERS BROOKS A ,  HARMAN ROBERT M ,  HOMA DANIEL S ,  BALAGOPAL AJIT ,  COUCH PHILIP ROBIN

IPC: G01S17/08 ,  G01L1/24

CPC classification number: G01S17/08 ,  E21B47/06 ,  E21B47/123 ,  G01L1/246 ,  G01S7/4818 ,  G01S17/88

公开(公告)号：EP3212886A4

公开(公告)日：2018-06-27

申请号：EP15855377

申请日：2015-09-28

Applicant: BAKER HUGHES INC

Inventor： BARRY ALEXANDER M ,  KU KARL KAI ,  MITCHELL IAN ,  JOHNSTON WILLIAM

IPC: E21B47/00 ,  G01K11/32 ,  G01L1/24 ,  G01V8/02 ,  G01V8/24

CPC classification number: G01K11/3206 ,  G01H9/004 ,  G01L1/246 ,  G01V2210/1429

Abstract: An apparatus for performing a measurement of a downhole property includes an optical fiber having a first section that has a first set of fiber Bragg gratings with a first resonant wavelength inscribed therein and a second section that has a second set of fiber Bragg gratings with a second resonant wavelength different from the first resonant wavelength inscribed therein. The second section is in series with the first section. An optical interrogator emits a swept-wavelength frequency domain light signal having varying wavelength amplitude modulation into the optical fiber, receives a frequency domain return light signal, and transforms the frequency domain return signal into a time domain to determine a resonant wavelength shift of each fiber Bragg grating and the corresponding location of each interrogated fiber Bragg grating. A processor converts the resonant wavelength shift of each interrogated fiber Bragg grating into the downhole property measurement.

公开(公告)号：EP2686712A4

公开(公告)日：2014-11-19

申请号：EP12757838

申请日：2012-02-15

Applicant: BAKER HUGHES INC

Inventor： DUNCAN ROGER G ,  BARRY ALEXANDER M ,  CHILDERS BROOKS A ,  BALAGOPAL AJIT ,  COUCH PHILIP ROBIN

IPC: G01V8/16 ,  E21B47/00 ,  G01D5/353

CPC classification number: E21B47/0006 ,  E21B47/123 ,  G01D5/35354