US 12,385,341 B2
Delayed acceleration of expandable metal reaction with galvanic corrosion
Cem Sonat, Singapore (SG); Mathusan Mahendran, Singapore (SG); and Chris M. Pelto, Carrollton, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Aug. 30, 2023, as Appl. No. 18/458,357.
Prior Publication US 2025/0075574 A1, Mar. 6, 2025
Int. Cl. E21B 23/01 (2006.01); E21B 43/10 (2006.01)
CPC E21B 23/01 (2013.01) [E21B 43/108 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A downhole tool, comprising:
a structure;
an anodic expandable metal member positioned about the structure, the anodic expandable metal member comprising a metal configured to expand in response to hydrolysis and having a first electrode potential value; and
a dissimilar cathodic electric conductor isolated within and in electrical contact with the anodic expandable metal member, the dissimilar cathodic electric conductor comprising a dissimilar metal having a second electrode potential value greater than the first electrode potential value, the first electrode potential value and the second electrode potential value configured to initiate a galvanic corrosion effect to increase an expansion rate of the anodic expandable metal member when a reactive fluid comes into contact with the dissimilar cathodic electric conductor and the anodic expandable metal member.