US 11,703,817 B2
Solder fatigue modeling
Amandine Battentier, Sugar Land, TX (US)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Oct. 26, 2021, as Appl. No. 17/452,324.
Claims priority of provisional application 63/106,929, filed on Oct. 29, 2020.
Prior Publication US 2022/0137576 A1, May 5, 2022
Int. Cl. G05B 17/02 (2006.01); E21B 41/00 (2006.01); E21B 12/02 (2006.01); G01M 99/00 (2011.01)
CPC G05B 17/02 (2013.01) [E21B 12/02 (2013.01); E21B 41/00 (2013.01); E21B 2200/08 (2020.05); E21B 2200/20 (2020.05); G01M 99/002 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of predicting damage of a downhole electrical equipment component comprising:
exposing the downhole electrical equipment component to a first thermal loading;
collecting first data from the downhole electrical equipment component while exposed to the first thermal loading;
determining a first mean stress from the first thermal loading of the downhole electrical equipment component based on the collected first data;
exposing the downhole electrical equipment component to a random vibrational loading;
collecting second data from the downhole electrical equipment component while exposed to the random vibrational loading;
determining a second mean stress from the random vibrational loading of the downhole electrical equipment component based on the collected second data;
estimating a first fatigue life of the downhole electrical equipment component based on the first mean stress and the second mean stress;
determining a first damage parameter based on the first fatigue life, wherein the first damage parameter is representative of first damage to the downhole electrical equipment component during the first thermal loading and the random vibrational loading;
exposing the downhole electrical equipment component to a second thermal loading;
collecting third data from the downhole electrical equipment component while exposed to the second thermal loading;
determining a third mean stress from the second thermal loading of the downhole electrical equipment component based on the third data;
exposing the downhole electrical equipment component to a shock loading;
collecting fourth data from the downhole electrical equipment component while exposed to the shock loading;
determining a fourth mean stress from the shock loading of the downhole electrical equipment component based on the fourth data;
estimating a second fatigue life of the downhole electrical equipment component based on the third mean stress and the fourth mean stress;
determining a second damage parameter based on the second fatigue life, wherein the second damage parameter is representative of second damage to the downhole electrical equipment component during the second thermal loading and the shock loading; and
combining the first damage parameter and the second damage parameter to generate a total damage parameter.