Abstract: A fluid discrimination system can include a fluid discriminator which selects through which of multiple outlet flow paths a fluid composition flows, the selection being based on a direction of flow of the fluid composition through the discriminator, and the direction being dependent on a fluid type in the fluid composition. Another fluid discriminator can include a structure which displaces in response to a fluid composition flow, whereby an outlet flow path of the fluid composition changes in response to a change in a ratio of fluids in the fluid composition. A method of discriminating between fluids can include providing a fluid discriminator which selects through which of multiple outlet flow paths a fluid composition flows in the well, the selection being based on a direction of flow of the fluid composition through the discriminator, and the direction being dependent on a ratio of the fluids in the fluid composition.

Abstract: A stator/rotor assembly includes at least one extruded preform bonded to a stator housing and/or a rotor mandrel. A method of constructing a stator/rotor assembly includes extruding at least one preform, and bonding the preform to a stator housing and/or a rotor mandrel. A method of constructing a stator includes applying multiple polymer strips to a bladder; and bonding the polymer strips to a stator housing while compressing the polymer strips between the bladder and the stator housing, without injection molding. A method of constructing a rotor includes applying multiple polymer strips to a rotor mandrel, and bonding the polymer strips to the rotor mandrel while compressing the polymer strips between a bladder and the rotor mandrel, without injection molding.