US Patent:
20170138178, May 18, 2017
Inventors:
- Sugar Land TX, US
Andrey Bogdan - Sugar Land TX, US
Adam Keilers - Richmond TX, US
Bruno Lecerf - Houston TX, US
International Classification:
E21B 47/09
E21B 17/20
Abstract:
A method moves a tube wave reflector in a well, generates a tube wave, receives a reflection, and determines the depth of one or more reflector locations from the elapsed time. Also, a method to locate a feature in a well deploys a bottom hole assembly (BHA), generates acoustic noise from the BHA, and autocorrelates to determine the BHA depth. Also, a system has a coiled tubing string to a BHA, a surface wave generator, a surface and/or distributed receiver, and a recorder to determine elapsed times between generation and receipt.