Jesse S Howard

US Patent:

20170167249, Jun 15, 2017

Filed:

Nov 18, 2016

Appl. No.:

15/355337

Inventors:

Erik N. Lee - Houston TX, US
Jesse J. Howard - Houston TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 47/14
E21B 49/00

Abstract:

A system includes a distributed acoustic sensing (DAS) optical fiber configured to be disposed with a downhole component, an interrogation device including an optical signal source configured to inject an optical signal into the DAS optical fiber and a receiver configured to detect return signals reflected from sensing locations in the fiber, and an acoustic telemetry unit configured to receive a communication from the downhole component and generate an acoustic signal having a frequency within a selected frequency range and encoded to carry the communication, the acoustic signal applied to a first section of the DAS optical fiber. The system also includes a processor configured to associate a first portion of the return signals with the first section and reproduce the communication based on the first portion, and associate a second portion of the return signals with a second section of the fiber and detect one or more acoustic events.