US 11,668,168 B2
Detection of wellbore faults based on surface pressure of fluids pumped into the wellbore
Sergei Parsegov, Houston, TX (US); Stanley Vernon Stephenson, Duncan, OK (US); Tirumani Swaminathan, Houston, TX (US); Daniel Joshua Stark, Houston, TX (US); and Baidurja Ray, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Aug. 27, 2021, as Appl. No. 17/459,581.
Prior Publication US 2023/0066612 A1, Mar. 2, 2023
Int. Cl. E21B 43/26 (2006.01); E21B 47/18 (2012.01); E21B 47/095 (2012.01); E21B 47/06 (2012.01); E21B 43/14 (2006.01)
CPC E21B 43/14 (2013.01) [E21B 43/26 (2013.01); E21B 47/06 (2013.01); E21B 47/095 (2020.05); E21B 47/18 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method for detecting wellbore faults, comprising:
obtaining pressure data associated with a pressure signal from a pressure sensor, wherein the pressure data includes measurements of a back pressure of a fluid being pumped into a wellbore over a selected time period;
converting, based on the pressure data, at least a portion of the pressure signal into frequency domain using a transformation from a time domain to the frequency domain;
detecting a change in frequency of the pressure signal in the frequency domain; and
determining that a fault associated with the wellbore has occurred based on the changed frequency of the pressure signal.