The present invention is a system and method for pumping a fluid using a high-speed, fluid evacuating pump in which the pump is operated by a battery powered hand drill, wherein a first embodiment of a pump design includes a rigid cylindrical draw tube with the intake placed at the bottom and an outlet disposed near the top, a gear assembly attached to the top of the pump to achieve proper impeller speeds required to reach the targeted fluid pumping volume, and a rigid and segmented driveshaft connected to the gear assembly to drive the impeller placed near the intake of the pump, wherein the driveshaft includes a plurality of solid segments and hollow segments threaded together to thereby decrease vibration of the driveshaft at high RPMs.

The present invention is a system and method for pumping a fluid using a high-speed, fluid evacuating pump in which the pump is operated by a battery powered hand drill, wherein a first embodiment of a pump design includes a rigid cylindrical draw tube with the intake placed at the bottom and an outlet disposed near the top, a gear assembly attached to the top of the pump to achieve proper impeller speeds required to reach the targeted fluid pumping volume, and a rigid and segmented driveshaft connected to the gear assembly to drive the impeller placed near the intake of the pump, wherein the driveshaft includes a plurality of solid segments and hollow segments threaded together to thereby decrease vibration of the driveshaft at high RPMs.

An electrical submersible well pump assembly has first and second permanent magnet motors. The first motor drive shaft is connected to a coupling that has internal splines for receiving an externally splined end of the second motor drive shaft. Alignment devices rotationally align magnetic poles of the first drive shaft with the magnetic poles of the second drive shaft prior to securing the housings of the first and second motors together. The alignment devices may be a coupling irregularity in the internal splines that is at a controlled orientation relative to the magnetic poles of the first shaft and a shaft irregularity in the external splines that prevents the second drive shaft from fully engaging the coupling unless the shaft irregularity is in a specified rotational position relative to the coupling irregularity.

An electrical submersible well pump assembly has first and second permanent magnet motors. The first motor drive shaft is connected to a coupling that has internal splines for receiving an externally splined end of the second motor drive shaft. Alignment devices rotationally align magnetic poles of the first drive shaft with the magnetic poles of the second drive shaft prior to securing the housings of the first and second motors together. The alignment devices may be a coupling irregularity in the internal splines that is at a controlled orientation relative to the magnetic poles of the first shaft and a shaft irregularity in the external splines that prevents the second drive shaft from fully engaging the coupling unless the shaft irregularity is in a specified rotational position relative to the coupling irregularity.

A thru-tubing conveyed (TTC) pump system comprising a rig-deployed assembly and a TTC removable assembly. The rig-deployed assembly includes a motor and a receiving base. The motor is configured to turn a first shaft, and an end of the first shaft includes a non-circular cross-section in a plane perpendicular to a longitudinal axis of the first shaft. The TTC removable assembly includes an engaging base and a pump, the pump configured to be turned by a second shaft. An end of the second shaft has a non-circular cross-section in a plane perpendicular to a longitudinal axis of the second shaft. The engaging base of the TTC removable assembly engages the receiving base of the rig-deployed assembly when the TTC removable assembly is delivered downhole.

An electrical submersible well pump assembly has first and second permanent magnet motors. The first motor drive shaft is connected to a coupling that has internal splines for receiving an externally splined end of the second motor drive shaft. Alignment devices rotationally align magnetic poles of the first drive shaft with the magnetic poles of the second drive shaft prior to securing the housings of the first and second motors together. The alignment devices may be a coupling irregularity in the internal splines that is at a controlled orientation relative to the magnetic poles of the first shaft and a shaft irregularity in the external splines that prevents the second drive shaft from fully engaging the coupling unless the shaft irregularity is in a specified rotational position relative to the coupling irregularity.

An electrical submersible well pump assembly has first and second permanent magnet motors. The first motor drive shaft is connected to a coupling that has internal splines for receiving an externally splined end of the second motor drive shaft. Alignment devices rotationally align magnetic poles of the first drive shaft with the magnetic poles of the second drive shaft prior to securing the housings of the first and second motors together. The alignment devices may be a coupling irregularity in the internal splines that is at a controlled orientation relative to the magnetic poles of the first shaft and a shaft irregularity in the external splines that prevents the second drive shaft from fully engaging the coupling unless the shaft irregularity is in a specified rotational position relative to the coupling irregularity.

The pump includes a ring-shaped first inclined surface formed in a portion of a production pipe located above a motor stator and inclined in a direction toward a central axis of the production pipe with respect to a direction from an upper end to a lower end of the production pipe, and a ring-shaped second inclined surface that is formed outside a lower end portion of a pump stator constituting an inner element and comes into surface contact with the first inclined surface.

An electric submersible pump (ESP) assembly. The ESP assembly comprises a first ESP component having a first drive shaft defining a plurality of male splines and defining at least one cut-out area; a second ESP component having a second drive shaft defining a plurality of male splines; a coupling shell defining a first plurality of female splines configured to mate with the male splines of the first drive shaft, a second plurality of female splines configured to mate with the male splines of the second drive shafts, and at least one shouldered aperture configured to align with the cut-out area of the first drive shaft; and at least one removable lug having a pin that is configured to extend through the shouldered aperture in the coupling shell to engage with the at least one cut-out area of the first drive shaft.

An electric submersible pump (ESP) assembly. The ESP assembly comprises a first ESP component having a first drive shaft defining a plurality of male splines and defining at least one cut-out area; a second ESP component having a second drive shaft defining a plurality of male splines; a coupling shell defining a first plurality of female splines configured to mate with the male splines of the first drive shaft, a second plurality of female splines configured to mate with the male splines of the second drive shafts, and at least one shouldered aperture configured to align with the cut-out area of the first drive shaft; and at least one removable lug having a pin that is configured to extend through the shouldered aperture in the coupling shell to engage with the at least one cut-out area of the first drive shaft.