US 12,404,726 B2
Distributed sensing with tubing encased conductors (TEC)
Michael Linley Fripp, Singapore (SG); Joachim Pihl, Sandefjord (NO); and Joseph Chakkungal Joseph, Spring, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Sep. 14, 2022, as Appl. No. 17/944,577.
Prior Publication US 2024/0084648 A1, Mar. 14, 2024
Int. Cl. G01D 5/20 (2006.01); E21B 17/02 (2006.01)
CPC E21B 17/0283 (2020.05) [G01D 5/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
transmitting, by an electrical conductor disposed in a wellbore, a time-varying electric signal to a first reflector wirelessly coupled to the electrical conductor and a sensor, wherein the sensor is wirelessly coupled to the electrical conductor via the first reflector, and wherein the electric conductor comprises a tubed-encased conductor (TEC) including an insulated wire that is enclosed in a metal tube and that carries the time-varying electric signal;
receiving a first reflected signal from the first reflector;
determining a frequency shift of the first reflected signal to calculate a sensor value for the sensor; and
determining, based on the sensor value, one or more downhole parameters.