Abstract: A downhole electric submersible pump (ESP) assembly. The downhole ESP assembly comprises a permanent magnet motor (PMM) comprising a first drive shaft, a stator, and a rotor disposed within the stator and comprising a core coupled to the first drive shaft, wherein the core retains a first permanent magnet element within a first magnet pocket defined by the core that extends axially parallel to the first drive shaft and retains a second permanent magnet element within a second magnet pocket defined by the core that extends axially parallel to the first drive shaft; a seal section having a second drive shaft coupled to the first drive shaft; and a pump assembly having a third drive shaft coupled to the second drive shaft.

Abstract: A downhole electric submersible pump (ESP) assembly. The downhole ESP assembly comprises a hybrid permanent magnet motor (PMM) comprising a first drive shaft, a stator, and a rotor comprising a first permanent magnet element, a second permanent magnet element, and an induction squirrel cage, wherein the rotor is mechanically coupled to the first drive shaft and disposed within the stator; a seal section having a second drive shaft coupled to the first drive shaft; and a pump assembly having a third drive shaft coupled to the second drive shaft.

Abstract: An electric submersible pump system comprises an electric submersible pump body (50) having a first mating profile (53), an electric submersible pump motor (54) having a second mating profile (55), and an electrical wet connect point (61) at the top of the electric submersible pump. The electric submersible pump body (50) has a first mating drive shaft, and the electric submersible pump motor (54) has a second mating drive shaft, such that first and second mating drive shafts engage and can transmit torque from one drive shaft to the other.

Abstract: Disclosed is an apparatus when installed with an Electrical Submersible Pump for fluid production protects the motor from the effect of solids on the shaft seal. The invention provides an apparatus that dynamically filters the solids and prevents them from contacting or accumulating at the vicinity of the shaft seal. The apparatus extends the run life of the ESP and prevents the motor dielectric fluid from being contaminated.

Abstract: Disclosed is an apparatus According to the present invention, a new winding arrangement was developed to enhance the manufacturability of stators with large length to diameter ratio and small aperture diameters such as the ones designed and manufactured for downhole pumping applications. The rectangular conductors are pre-formed to a specific shape, nested together, and inserted into the stator slots. Once the conductors are inserted, additional bending and joining operations are required to complete the coils and phases. These operations can be either fully automatic or semi-automatic. The structure of the winding allows insertion of phase and phase to phase insulation after the joining operation is completed thus reducing the risk of damage to the insulation system during the joining process.

Abstract: A separator for reducing or eliminating the amount of suspending solids from a reservoir fluid of a downhole motor having a rotating seal. The cleaned fluid circulated past the seal and outermost bearing, the separator having a vortex, rotating cyclone or centrifuge, at least one inlet at least one outlet for cleaned fluid, at least one outlet for solid material, water, particulates or similar material separated from the cleaned fluid. The outlet for the clean fluid may include a porous filter.

Abstract: A wet connection system suitable for use in hydrocarbon wells is formed from one or more elongated, small diameter conduits which extend down the wellbore and which terminate adjacent a locating structure on the production tubing. Equipment deployed at the locating structure is connected to one or more self supporting conductors which extend down the conduits from the wellhead. Preferably the conductors are retractable and the conduits are sealingly connected to the equipment, allowing the equipment and conductors to be deployed and recovered independently of each other and to be flushed with dielectric oil pumped down the conduits after re-connection.

Abstract: A stator has a field winding, the winding comprising a plurality of axial conductors connected at their ends to form at least one circuit with a number of turns. Each axial conductor, or set of axial conductors having a common voltage, is disposed within an insulated channel member, the insulated channel member being disposed within a stack of laminations. The axial conductors and the tubular insulation members are radially distributed at equal angles.

Abstract: An electric submersible progressive cavity pump assembly is disclosed, which includes an electric motor, a progressive cavity pump, a transmission rotatable by the motor, and a torque isolator coupled between the transmission and the progressive cavity pump, where the torque isolator includes resilient members which accommodate sudden changes in torque.

Abstract: A rotor system for a downhole motor comprises a set of permanent magnets, a set of conductors and a pair of end conductor rings connecting the set of conductors. The set of permanent magnets and the set of conductors being substantially coaxial and having the substantially the same linear extent. The set of permanent magnets can be located radially inwards from the set of conductors, and may be provided by discrete conductive bars.

Abstract: A rotor system for a downhole motor includes at least one permanent magnet rotor section, and at least one squirrel cage rotor section. The permanent magnet rotor section and the squirrel cage rotor section are joined in series by a connection. In one example the connection includes a male self lock taper on one rotor, and a corresponding female self lock taper on the other rotor.

Abstract: A downhole electric submersible pump, with at least one pump unit having a pump inlet, and an electric motor system to power the pump, the electric motor system comprising an induction motor and permanent magnet motor. The induction motor and permanent magnet motor share a common power supply, connected in series.

Abstract: A stator has a field winding, the winding comprising a plurality of axial conductors connected at their ends to form at least one circuit with a number of turns. Each axial conductor is disposed within a tubular axial insulation member, the tubular axial insulation members being disposed within a stack of laminations. The axial conductors and the tubular insulation members are radially distributed at equal angles. The position of the axial conductors and the tubular insulation members is predetermined.

Abstract: An electric submersible pump system comprises an electric submersible pump body (50) having a first mating profile (53), an electric submersible pump motor (54) having a second mating profile (55), and an electrical wet connect point (61) at the top of the electric submersible pump. The electric submersible pump body (50) has a first mating drive shaft, and the electric submersible pump motor (54) has a second mating drive shaft, such that first and second mating drive shafts engage and can transmit torque from one drive shaft to the other.

Abstract: A separator for reducing or eliminating the amount of suspending solids from a reservoir fluid of a downhole motor having a rotating seal. The cleaned fluid circulated past the seal and outermost bearing, the separator having a vortex, rotating cyclone or centrifuge, at least one inlet at least one outlet for cleaned fluid, at least one outlet for solid material, water, particulates or similar material separated from the cleaned fluid. The outlet for the clean fluid may include a porous filter.

Abstract: A stacked stator comprises a plurality of modular components including modular stator elements canned in a cylindrical wall each modular stator being substantially equal in length to a bearing span for the rotor a thin wall longitudinal tube which seals the rotor cavity wherein each modular component abuts the modular component to seal the rotor cavity. The modular components include modular bearing supports. Longitudinal winding slots are provided, having insulating slot liners, which may be extruded.

Abstract: A fluid system for a pump, which includes a downhole rotating shaft and bearings inside a housing, and where a fluid volume around shaft is circulated from outside housing through a filter, so that only clean non-abrasive fluid is permitted inside fluid volume pump to draw fluid around the shaft. A fluid expeller is included to expel fluid from the accumulated volume of fluid through the filter to purge the filter.

Abstract: A wet connection system suitable for use in hydrocarbon wells is formed from one or more elongated, small diameter conduits which extend down the wellbore and which terminate adjacent a locating structure on the production tubing. Equipment deployed at the locating structure is connected to one or more self supporting conductors which extend down the conduits from the wellhead. Preferably the conductors are retractable and the conduits are sealingly connected to the equipment, allowing the equipment and conductors to be deployed and recovered independently of each other and to be flushed with dielectric oil pumped down the conduits after re-connection.

Abstract: A downhole cable is made from a copper clad steel conductor, to which an insulator layer is applied to, and then a plurality of thin wall layers is applied around the insulator layer. Each of the thin wall layer is joined and sealed along a longitudinal seam by welding, and swaged to fit against the previous layer.

Abstract: A wind energy system with a wind turbine having a cowling surrounded by a diffuser, a plurality of inner rotor blades located inside of the cowling that rotate about an inner rotor hub, a plurality of outer rotor blades positioned between the diffuser and the cowling that rotate in an opposite direction to that of the plurality of inner rotor blades, a drive mechanism located within the inner rotor hub, a dynamic telescopic tower with a height that adjusts automatically by motors controlled by a controller based on input from sensors located in the dynamic telescopic tower and on the wind turbine, and a tower support that connects the wind turbine to the dynamic telescopic tower.