A mobile emergency water supply and drainage device is provided, which relates to the technical field of emergency rescue and disaster relief equipment. The device includes a submersible pump, relay pumps, and an electric power supply device for providing electric power for the submersible pump and the relay pumps. Frequency conversion control cabinets are arranged between the submersible pump as well as the relay pumps and the electric power supply device, and the submersible pump and the relay pumps are connected in series by pipelines for remote water supply and drainage. The device further includes a floating body for suspending the submersible pump in water, and the floating body floats on a surface of the water and is connected with the submersible pump through a lifting chain.

A mobile emergency water supply and drainage device is provided, which relates to the technical field of emergency rescue and disaster relief equipment. The device includes a submersible pump, relay pumps, and an electric power supply device for providing electric power for the submersible pump and the relay pumps. Frequency conversion control cabinets are arranged between the submersible pump as well as the relay pumps and the electric power supply device, and the submersible pump and the relay pumps are connected in series by pipelines for remote water supply and drainage. The device further includes a floating body for suspending the submersible pump in water, and the floating body floats on a surface of the water and is connected with the submersible pump through a lifting chain.

Electric submersible pump systems, and more particularly, seals for ESPs, are provided. An electric submersible pump includes a plurality of impellers; a plurality of diffusers; at least one sealing ring positioned axially between two consecutive diffusers of the plurality of diffusers; and at least one O-ring positioned axially between the at least one sealing ring and a lower of the two consecutive diffusers.

Embodiments of the present invention are related to a centrifugal pump system including a cylinder. The cylinder may have a cylinder bottom with a cylinder inlet and lower chamber, a cylinder body with a plurality of longitudinal channels, and a cylinder top with a plurality of spouts. The system may include an annulus with a circular channel and an outlet. The cylinder and lower chamber may be structured to rotate. The dimensions of the longitudinal channels may be sized by dividing the cylinder inlet area by the number of channels and in some embodiments reducing that quotient. Furthermore, the spouts may further reduce the area of fluid flow delivered by the longitudinal channels.

A centrifugal pump system including a cylinder with a cylinder bottom having a cylinder inlet and lower chamber, a cylinder body including a plurality of longitudinal channels, and a cylinder top including a plurality of spouts. The system also includes an annulus with a circular channel and outlet as well as a motor. The motor is structured to rotate the cylinder with less energy once the cylinder has achieved a threshold rotations per minute.

Intake and gas separators for a downhole rotary pump define a fluid flowpath and comprise two or more intake stages arranged in parallel, and two or more of the intake stages each have one or more impellers and one or more inlet holes.

A submersible pump comprises a rotational assembly and a rotational assembly housing. The rotational assembly has a plurality of in-line flow inducing sections. A centerline longitudinal axis of each of the flow inducing sections extends colinearly with a rotational axis of the rotational assembly. A downstream end portion of a flow pressurizing section is engaged with an upstream end portion of a rotational flow amplification section. A downstream end portion of the rotational flow amplification section is engaged with an upstream end portion of a flow outlet section. The rotational assembly housing has an interior space extending along a centerline axis of the rotational assembly housing. The rotational assembly is disposed within the interior space of the rotational assembly housing. The rotational assembly and the rotational assembly are jointly configured for causing the rotational axis to extend colinearly with the centerline longitudinal axis of the rotational assembly housing.