Wellbore pumps in series, including device to separate gas from produced reservoir fluids

A pump system for a wellbore, comprising:

• a production tubing disposed in a wellbore;
• at least two pumps disposed in the production tubing and axially spaced apart from each other, at least one of the at least two pumps removable from the production tubing while the production tubing remains in place in the wellbore;
• and
• at least one fluid intake conduit disposed outside the production tubing and inside the wellbore, the at least one fluid intake conduit in fluid communication with and providing a fluid transport path between an interior of the production tubing below a lower one of the at least two pumps and at a position of an intake of an upper one of the at least two pumps;
• and
• at least one fluid discharge conduit disposed outside the tubing and inside the wellbore, the at least one fluid discharge conduit in fluid communication with and providing a fluid transport path between the interior of the production tubing at a discharge of the lower one of the at least two pumps and either at an intake of or above the upper one of the at least two pumps.