A motor for an electrical submersible pump includes a stator and rotor, where the rotor is made up of adjacent columns of magnets affixed onto an annular core. End rings on opposite ends of the core provide axial backstops for magnet columns. Thin coaxial sleeves are shrunk fit over the magnets and end rings and that radially compress the magnets. Apertures in a column are formed radially through the core and receive fasteners for securing a guide bar to the core. The guide bar simulates an installed column of magnets to guide placement of adjacent columns of magnets as the guide bar width is substantially the same as a column of magnets, and aperture locations are strategically positioned so that when the guide bar is secured onto the core. After the guide bar is removed the one of the columns of magnets is then adhered to the core.

A submersible pump providing an impeller pump assembly, an aerator pump assembly, a central hub assembly, and a nozzle assembly. The combination or integration of two independently driven, high-pressure impeller pump assembly and high-volume pump aerator pump assembly simultaneously coacting within the same submersible pump apparatus and using the central hub assembly and nozzle assembly to create and display the combination of very tall streams while simultaneously displaying a wide variety of other beautiful high-volume or flow display aerator spray patterns

A portable power supply device for an electric tool comprises: a power supply receiving portion, provided in or on a housing and used to receive a power supply supplying power to the electric tool, and a control unit, comprising a controller that is provided in the housing and is used to control the electric energy supplied to the electric tool. The power supply receiving portion comprises a power supply compartment, which is at least partially defined by a cover which can move relative to the housing between an opened position and a closed position. The power supply device further comprises a positioning accessory detachably and replaceably attached to the housing and/or the power supply receiving portion.

Methods are provided to prepare a low sulfur fuel from hydrocarbon sources, such as light tight oil and high sulfur fuel oil, often less desired by conventional refiners, who split crude into a wide range of differing products and may prefer presence of wide ranges (C3 or C5 to C20 or higher) of hydrocarbons. These fuels can be produced by separating feeds into untreated and treated streams, and then recombining them. Such fuels can also be formulated by combinations of light, middle and heavy range constituents in a selected manner as claimed. Not only low in sulfur, the fuels of this invention are also low in nitrogen and essentially metals free. Fuel use applications include on-board large marine transport vessels but also on-shore for large land based combustion gas turbines, boilers, fired heaters and transport vehicles and trains.

An electric submersible pumping system is constructed with an outer housing which contains an integrated pump and motor. The pump may comprise an impeller disposed within a stator of the motor to form an integrated pump and the motor. An electric submersible pumping system includes a stator having a passage extending longitudinally through the stator. A plurality of stages, including impellers and diffusers, are disposed within the passage.

A tool includes a device including a housing and a rotor, the rotor to rotate about a longitudinal axis, and an axial gap generator including a stator assembly positioned adjacent to the rotor. The axial gap generator generates a voltage signal as a function of a gap spacing between the stator assembly and the rotor, the gap spacing being parallel to the longitudinal axis.

A tool includes a device including a housing and a rotor, the rotor to rotate about a longitudinal axis, and an axial gap generator including a stator assembly positioned adjacent to the rotor. The axial gap generator generates a voltage signal as a function of a gap spacing between the stator assembly and the rotor, the gap spacing being parallel to the longitudinal axis.

A method for mitigating water invasion to a submersible motor includes: forming an accumulation zone within an inner space of the submersible motor, wherein the accumulation zone is disposed at a bottom of the inner space below a motor shaft; measuring a conductivity of a fluid inside the accumulation zone using a sensor, wherein the fluid comprises water and dielectric oil; comparing the conductivity of the fluid with a threshold value; upon detecting that the conductivity of the fluid is greater than the threshold value, activating a solenoid pump to discharge the fluid from the accumulation zone to an outside of the submersible motor.

A method for mitigating water invasion to a submersible motor includes: forming an accumulation zone within an inner space of the submersible motor, wherein the accumulation zone is disposed at a bottom of the inner space below a motor shaft; measuring a conductivity of a fluid inside the accumulation zone using a sensor, wherein the fluid comprises water and dielectric oil; comparing the conductivity of the fluid with a threshold value; upon detecting that the conductivity of the fluid is greater than the threshold value, activating a solenoid pump to discharge the fluid from the accumulation zone to an outside of the submersible motor.

An electric submersible pump (ESP) assembly. The ESP assembly comprises a centrifugal pump assembly; a seal section; and an electric motor comprising a drive shaft having a bore concentric with a longitudinal axis of the drive shaft and a fluid mover disposed within and coupled to the bore of the drive shaft.