An electric submersible pump (ESP) assembly. The ESP assembly comprises an electric motor, a centrifugal pump, and a hybrid magnetic thrust bearing, wherein the hybrid magnetic thrust bearing is disposed inside the electric motor or disposed inside the centrifugal pump.

In one aspect, a pump is provided comprising a motor configured to rotate a shaft that is operably coupled to an impeller. The impeller is housed within a fluid chamber having an inlet and a discharge in fluid communication with the inlet. The fluid chamber further includes an outlet in a top portion thereof for venting air within the fluid chamber when the impeller is rotated by the motor. In other forms, a pump assembly is provided with an internal float switch integrated into the pump housing.

A variable-part liquid cooling pumping unit comprising a water block unit having a water block set, flow guiding plate, and water block cover, and a pump unit having a pump housing assembly is provided. The pump housing assembly comprises an impeller cavity inlet, flow adjusting disc, impeller cavity, and impeller cavity outlet opening. Inlet and outlet ports are positioned on a same side of and plane as the pump housing assembly. More than one water block unit and pump unit are provided and interchangeable. During operation, working fluid is sucked via the inlet port through the impeller cavity inlet, pass the flow adjusting disc, into the impeller cavity, to a plurality of curved blades of a rotor assembly unit impeller. From there, the working fluid travels through the impeller cavity outlet opening, flow guiding plate, and water block set, before exiting through the flow guiding plate, and outlet port.

Systems and features for improving sand control in pumps are provided. These features can be used in centrifugal pumps employed in a variety of oilfield applications, such as in electric submersible pumping systems positioned downhole in a wellbore to pump oil or other fluids. Such features include shielded anti-swirl ribs positioned in the balance chamber.

A pump includes a housing which forms a suction chamber and a discharge chamber therein; a suction nozzle which is disposed in one side of the housing, and communicates with the suction chamber; a discharge nozzle which is disposed in the other side of the housing, and communicates with the discharge chamber; a partition wall which partitions the suction chamber and the discharge chamber, and has a communication hole, which communicates the suction chamber and the discharge chamber, that is formed at a central portion; and a plurality of baffles which are disposed inside the suction chamber, and guide fluid introduced through the suction nozzle to the communication hole, wherein the plurality of baffles have different lengths and are separated apart from each other in a circumferential direction in an upper side of the partition wall.

A self-priming assembly for a multi-stage pump is provided. The self-priming assembly includes a first diffuser with a first central portion, a first diffuser axis, a first arcuate channel within the first central portion, and a first arcuate passage extending through the first central portion and a first peripheral portion having a first ledge. The self-priming assembly also includes a second diffuser with a second central portion, a second diffuser axis, a second arcuate channel within the second central portion, a second arcuate passage extending through the second central portion, and a second peripheral portion having a second ledge. The first ledge abuts the second ledge. Further, the self-priming assembly includes an impeller with an impeller axis. The first diffuser and the second diffuser are configured to be combined and to receive the impeller therebetween with the first diffuser axis, the second diffuser axis, and the impeller axis aligned.

A vertical multi-stage pump includes a rotation shaft extending in a vertical direction, a plurality of impellers fixed to the rotation shaft, a multi-stage pump chamber accommodating the plurality of impellers and comprising a suction port for a first-stage impeller at a lower end, a lower casing comprising a suction nozzle extending in a horizontal direction and forming a communication space communicating the suction nozzle and the suction port, and an inner cylinder member interposed between the multi-stage pump chamber and a lower casing and expanding the communication space in a vertical direction.

A downhole gas separator fluid mover assembly comprising a fluid mover having an inlet and an outlet, a separation device, a separation chamber, and a flow path separator located downstream of the fluid mover. The fluid mover comprising a centrifugal pump stage with an impeller and a diffuser moves production fluid comprising a high viscosity fluid portion and a gas portion to the separation device. The separation device produces a fluid motion that separates the gas phase from the liquid phase in response to the flow rate of production fluid from the fluid mover. A portion of the high viscosity fluid passes through the gas phase discharge port in response to the over-supply of high viscosity fluid to the liquid discharge port in response to the flow rate of the production fluid through the fluid mover.

A rotary apparatus for inputting thermal energy into fluidic medium is provided, the apparatus comprises: a casing with at least one inlet and at least one outlet; a rotor comprising at least one row of rotor blades configured as impulse impeller blades arranged over a circumference of a rotor hub mounted onto a rotor shaft; at least one row of stationary nozzle guide vanes arranged upstream of the at least one row of the rotor blades, respectively; and at least one row of stationary diffuser vanes arranged downstream of the at least one row of the rotor blades, respectively. The apparatus is configured to impart an amount of thermal energy to a stream of fluidic medium directed along a flow path formed inside the casing between the inlet and the outlet by virtue of a series of energy transformations occurring when said stream of fluidic medium successively passes through the blade/vane rows formed by the nozzle guide vanes, the rotor blades and the diffuser vanes, respectively, wherein, in said apparatus, a space formed between an exit from the at least one row of diffuser vanes and an entrance to the at least one row of nozzle guide vanes in a direction of the flow path formed inside the casing between the inlet and the outlet is made variable to regulate the amount of thermal energy input to the stream of fluidic medium propagating through the apparatus. Related uses and a method for inputting thermal energy into a fluidic medium are further provided.

A first fluid rotor that has a first fluid intake end and a first fluid discharge end. A second fluid rotor that has a second fluid intake end and a second fluid discharge end. The second fluid rotor is rotatably coupled to the first fluid rotor to rotate in unison with the first fluid rotor along a shared rotational axis. The first fluid intake end and the second fluid intake end are facing opposite directions. A first fluid stator surrounds the first fluid rotor. The first fluid rotor and the first fluid stator form a first fluid stage. The second fluid stator is aligned along the rotational axis. The second fluid stator and the second fluid rotor form a second fluid stage. A flow crossover sub is positioned between the first fluid stage and the second fluid stage.