Balancing axial thrust in submersible well pumps

A method comprising:

• receiving a fluid into a common fluid intake;
• rotating a fluid rotor positioned within a wellbore, the fluid rotor having a first pressure gaining section and a second pressure gaining section, both the first pressure gaining section and the second pressure gaining section fluidly connected to the common fluid intake by flow passages of a flow crossover sub;
• directing the fluid from the common fluid intake into the first pressure gaining section through the flow passages of the flow crossover sub;
• creating a first axial thrust load in a first direction in response to directing the fluid into the first pressure gaining section;
• after creating the first axial thrust load in the first direction by the first pressure gaining section, discharging the fluid from the first pressure gaining section through a first fluid discharge end of the first pressure gaining section to a common fluid discharge;
• directing the fluid into the second pressure gaining section through the flow passages of the flow crossover sub;
• creating a second axial thrust load in response to directing the fluid into the second pressure gaining section, the second axial thrust load being in the opposite direction of the first axial thrust load;
• after creating the second axial thrust load in the opposite direction by the second pressure gaining section, discharging the fluid from the second pressure gaining section through a second fluid discharge end of the second pressure gaining section to the common fluid discharge;
• and
• discharging the fluid from the common fluid discharge, wherein the common fluid discharge is fluidically connected to the first pressure gaining section and the second pressure gaining section by a first flow passage.