US 12,215,707 B2
Sacrificial anode assembly for a seal section of an electric submersible pump (ESP) assembly
Steven Pyron, Tulsa, OK (US); Matthew Thomas King, Denver, CO (US); and Jeffrey Frey, Tulsa, OK (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Jan. 25, 2023, as Appl. No. 18/101,326.
Prior Publication US 2024/0247660 A1, Jul. 25, 2024
Int. Cl. F04D 29/10 (2006.01); E21B 43/12 (2006.01); F04D 13/08 (2006.01)
CPC F04D 29/106 (2013.01) [E21B 43/128 (2013.01); F04D 13/086 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electric submersible pump (ESP) assembly, comprising:
an electric motor having a first drive shaft;
a seal section coupled to the electric motor and comprising a second drive shaft that is coupled to the first drive shaft, a housing, and at least one sacrificial anode assembly that comprises
a sacrificial anode body configured to attenuate the corrosive effect of H2S (hydrogen sulfide) fluid and
a containment disposed inside the housing, defining an interior chamber between an outside of the containment and an inside of the housing, defining an annulus disposed around the sacrificial anode body, defining interiorly an initially void space downhole of the sacrificial anode body, and disposed around the second drive shaft, wherein the sacrificial anode assembly defines two ports open to the interior chamber of the seal section, wherein the two ports are disposed in an uphole half of the sacrificial anode assembly, and wherein the sacrificial anode assembly defines a folded fluid flow path between the two ports through the sacrificial anode body; and
a pump assembly having a third drive shaft that is coupled directly to the second drive shaft or coupled indirectly to the second drive shaft by one or more intermediate drive shafts.