US 12,352,153 B2
Method for detection of scale on ESP using differential temperature measurement
Shawn Gunter, Owasso, OK (US); and Ryan Semple, Owasso, OK (US)
Assigned to Baker Hughes Oilfield Operations LLC, Houston, TX (US)
Filed by Baker Hughes Oilfield Operations LLC, Houston, TX (US)
Filed on Feb. 17, 2024, as Appl. No. 18/444,677.
Claims priority of provisional application 63/446,464, filed on Feb. 17, 2023.
Prior Publication US 2024/0280012 A1, Aug. 22, 2024
Int. Cl. E21B 43/12 (2006.01); E21B 47/00 (2012.01); E21B 47/07 (2012.01); G01K 3/14 (2006.01)
CPC E21B 47/006 (2020.05) [E21B 43/128 (2013.01); E21B 47/07 (2020.05); G01K 3/14 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for operating an electric submersible pumping system that includes an electric motor and a motor drive, the method comprising the steps of:
operating the electric submersible pumping system until it reaches a steady-state operating condition;
obtaining a first internal motor temperature measurement;
obtaining a first external motor temperature measurement;
determining a first temperature differential based on the difference between the first internal motor temperature measurement and the first external motor temperature measurement;
obtaining a second internal motor temperature measurement;
obtaining a second external motor temperature measurement;
determining a second temperature differential based on the difference between the second internal motor temperature measurement and the second external motor temperature measurement;
comparing the second temperature differential to the first temperature differential; and
indicating a probability of scale accumulation on the electric motor if the second temperature differential is greater than the first temperature differential.