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| Number | Title | Issue Date |
| 8148861 | Canned or sleeved rotary machine and method of manufacturing it A canned or sleeved rotary machine is equipped with a rotor (101) in contact with a particle-laden, acidic or corrosive gaseous atmosphere, and with a functional electrical assembly such as a magnetic bearing comprising a rotor armature (106) secured t... | 04/03/2012 |
| 8076809 | Additives for improving motor oil properties An electric submersible motor is provided that includes a plurality of rotors and bearings mounted on a shaft, and a stator external to said rotors. A running clearance is located between an inner diameter of the stator and external diameter of the rotors, and inclu... | 12/13/2011 |
| 8076810 | Method for assembling an electric motor and motor obtained using this method A method for assembling an electric motor of the type having a stator unit (5) and a rotary unit (6) housed in a containment compartment (2a) delimited by a casing (2), includes exposing the compartment (2a) to a diff... | 12/13/2011 |
| 7859152 | Submersible direct-current electric motor The claimed invention relates to a submersible direct-current electric motor to be used, in particular, for driving a submersible pump in downhole oil production. The claimed motor includes a fixed armature winding; a housing which encloses the armature winding and ... | 12/28/2010 |
| 7839036 | Can of wet-running electric motor and pump assembly A can of a wet-running electric motor can be produced from a non-metallic material, wherein the non-metallic material is provided with at least one additional hermetically sealing layer. A pump unit having a can of this type is also provided. ... | 11/23/2010 |
| RE41627 | Submersible motor unit A submersible motor unit is used to drive a pump and is submerged with the pump in liquid (water). The motor unit includes a tubular housing member and a tubular inner member which is enclosed by and disposed in a coaxial relationship with the tubular housing member... | 09/07/2010 |
| 7741744 | System and method for protecting a submersible motor A technique is provided to facilitate pumping of fluids in a well. A submersible pumping system utilizes a submersible motor to power a submersible pump. A motor protector works in cooperation with the submersible motor to protect motor fluid within the submersible ... | 06/22/2010 |
| 7687950 | Drillstring alternator A downhole source of electrical power for drilling tools is driven by the rotation of a drillstring or, if the drillstring is not rotating, by the rotation of a drilling sub. The source consists of an alternator having a rotor made up of a series of coils that are m... | 03/30/2010 |
| 7679242 | Shrink tube encapsulated magnet wire for electrical submersible motors An electrical motor for an electrical submersible pump wherein the electrical motor has increased heat transfer capabilities. The electrical motor includes a housing and a plurality of stator laminations within the housing. Each stator lamination defines a central o... | 03/16/2010 |
| 7595573 | Submersible electric motor terminated for auxiliary tools A submersible electric motor in a submersible pump system is provided that facilitates connecting auxiliary tools with the motor and disconnecting auxiliary tools from the motor without draining the fluid from the motor. The motor includes electrical terminals for c... | 09/29/2009 |
| 7535138 | Reversible submerged motor A reversible submerged motor includes a double open end housing with an inside bracket, a barrel-like axle holder, which is affixed to the bracket of the housing and holds a winding around a tubular axle thereof, and a vane holder, which has a shaft pivotally suppor... | 05/19/2009 |
| 7535139 | Bi-directional reversible submersible motor A bi-directional reversible submersible motor, which includes a housing having an inside bracket, two water guide plates fastened to the two distal ends of the housing and covered with a respective cap, a locating rod connected between the water guide plates, a slee... | 05/19/2009 |
| 7504752 | Electric motors for powering downhole tools An electric-motor assembly for installation in a borehole to power a downhole tools such as a pump has a first impermeable tube defining an axis and a stator fixed in the tube and having a series of coiled windings and laminations and electrically insulating potting... | 03/17/2009 |
| 7492069 | Pressurized bearing system for submersible motor Pressurized lubricant is used for stabilizing shaft bearings in an electrical submersible pump motor. A lubricant pump is located within the motor housing. The lubricant pump has a set of impellers attached to a lower end of the shaft and rotating with the shaft, th... | 02/17/2009 |
| 7400074 | Combined low power oil filled submersible motor and its protector The present utility model relates to submersible motor and its protector. A shared assembling base is provided to support and fix one end of the housing of the submersible motor and protector, the submersible motor has a main shaft to connect through the protector. ... | 07/15/2008 |
| 7378769 | Electric motors for powering downhole tools An electric motor for powering downhole tools comprises a first stator (32) including a first set of coil windings (73), a second stator including a second set of windings, an axially located rotatable shaft (92) including a first magnetic eleme... | 05/27/2008 |
| 7370697 | Thrust section wear preventor A thrust section for use above a motor preferably includes a housing, a thrust shaft, a thrust runner connected to the thrust shaft, a thrust bearing connected to the housing, and a motor lead guard. The motor is preferably positioned above a pump assembly. The thru... | 05/13/2008 |
| 7367400 | Motor protector and method for chemical protection of same A chamber for use in a submersible pump assembly. The submersible pump assembly has a submersible motor which is connected to a power source and which will drive a submersible pump in the submersible pump assembly. A motor protector with expansion chamber is connect... | 05/06/2008 |
| 7352097 | Motor or generator and method of producing the same A plurality of slots are provided at a stator core. A coil component is produced by winding conductor wires around a forming tool several times. The coil component is cut off at a predetermined part and inserted into a slot so as to cross over the plurality of slots... | 04/01/2008 |
| 7352090 | Fluid-submerged electric motor An electric motor has at least one component that is submerged in a cooling fluid held in a fluid-filled cavity. The stator, rotor, and rotor shaft bearings are all possible components that may be submerged. The cooling fluid floods the stator, rotor, and/or bearing... | 04/01/2008 |
| 7339300 | Structural support member for stator retention and method of assembling an electromechanical transmission An electromechanical transmission includes a motor/generator having a stator and a rotor and including a structural support member that supports the stator in fixed relation thereto and the rotor in rotational relation thereto. By supporting both the stator and the ... | 03/04/2008 |
| 7327057 | Neutral-point terminal device for dynamoelectric machine A neutral-point terminal device for use with a neutral point side bundle of wires in a polyphase winding of a dynamoelectric machine includes a metal sleeve and an insulating cap covering the metal sleeve. The metal sleeve is covered by the insulating cap so that di... | 02/05/2008 |
| 7327045 | Fuel delivery system and method providing regulated electrical output In a mobile fuel delivery vehicle, providing bulk aircraft fuel from a pressurized fuel reservoir to an aircraft, a method of regulating electrical output of an electrical power source, includes the steps of: (a) receiving, in a fluid path, the bulk aircraft fuel fr... | 02/05/2008 |
| 7299873 | Method for pumping fluids The production rate, useful life and operating efficiency of electric submergible pumping systems (ESP) is improved by operating the system so that the motor (220, 320) is cooled by two passes of production. Production fluids remove waste heat from the motor ... | 11/27/2007 |
| 7285931 | Brushless motor commutation and control A commutation apparatus drives a brushless motor having a stator equipped with a plurality of coils and a rotor. The commutation apparatus comprises a rotatable commutator shaft, two or more conducting rings carried discretely about the shaft, and two or more conduc... | 10/23/2007 |
| 7270178 | Horizontally oriented gas separator A gas restrictor for an intake of a horizontally oriented submersible well pump has a tubular housing and a number of apertures. A sleeve is mounted within the housing for rotation relative to the housing. The sleeve has an axially extending row of slots. At least o... | 09/18/2007 |
| 7270074 | Diver propulsion system with separate battery and motor-transmission modules A diver propulsion system includes separate battery and motor-transmission modules. ... | 09/18/2007 |
| 7268461 | Low cost electrical motor components manufactured from conductive loaded resin-based materials Electric motor components are formed of a conductive loaded resin-based material. The conductive loaded resin-based material comprises micron conductive powder(s), conductive fiber(s), or a combination of conductive powder and conductive fibers in a base resin host.... | 09/11/2007 |
| 7264450 | Pump unit and method for operating a pump unit The method is provided for operating a pump unit with a centrifugal pump which is driven by an electric motor and which comprises a rotor running in a split tube. The rotor space is separated with respect to the stator in a fluid-tight manner. On running the motor t... | 09/04/2007 |
| 7256521 | Motor or generator and method of producing the same A plurality of slots is provided at a stator core. A cable component is formed by bundling a plurality of conducting wires and connectors are mounted on both ends. The cable component is inserted into corresponding slot so as to cross over the corresponding pluralit... | 08/14/2007 |
| 7249984 | Electric propulsion unit An electric propulsion unit can include a propeller for producing thrust, a motor for driving the propeller, and a fuel cell for supplying electric power to drive the motor. The fuel cell can include a fuel cell stack for generating power and a fuel tank for feeding... | 07/31/2007 |
| 7239056 | Low speed canned motor A canned motor has an L3/D4 ratio of less than 50, with one bearing on one end of the rotor assembly configured to resist longitudinal displacement of the rotor as by an axial shaft load, and another bearing on the other end of the rotor assemb... | 07/03/2007 |
| 7217107 | Protector for electrical submersible pumps A system and method for protecting a motor for a submersible pumping system. A variety of motor protectors are provided for application in variable temperature environments and multiple wellbore orientations. The motor protectors may include one or more of a positiv... | 05/15/2007 |
| 7215059 | Reluctance motor with at least two salient poles each provided with an exciter winding, and method for manufacturing the stator of such reluctance motor A reluctance motor in which at least one snap ring engages the ends of the exciter coils remote from the stator yoke with radially outward acting spring force. ... | 05/08/2007 |
| 7215051 | Single-phase motor particularly for submersed pumps A single-phase motor (10) particularly for submersed pumps, characterized in that it comprises an annular capacitor (14) interposed between the pump coupling head (15) and the stator winding pack (12). ... | 05/08/2007 |
| 7215052 | Brushless D.C. motor The brushless direct current motor comprises a housing 10, a stator 13 and a rotor 11 within the housing, windings on the stator, sensors for sensing the position of the rotor relative to the stator and electronic circuitry for switching the cur... | 05/08/2007 |
| 7207852 | Ship propulsion arrangement A ship propulsion arrangement is provided in which a mechanical drive shaft (3) extends through a hull (9) of a ship (1) to an external body (7). The external body incorporates an electric motor. The mechanical drive shaft (3) is d... | 04/24/2007 |
| 7208855 | Fiber-optic cable as integral part of a submersible motor system Apparatus, systems and methods are provided for transmission of optical signals through a wellbore whereby optic fibers are protected from exposure to harsh downhole fluids and conditions. The system comprises a power cable assembly running down hole from the surfac... | 04/24/2007 |
| 7199497 | Frameless switched reluctance motor and application as a top drive for a rotary pump A frameless switched reluctance motor (SRM) has a stator sandwiched between two housings. Axial load on the rotor shaft is directed through a first bearing, through the first housing to the stator and through the second housing to a motor support. Heat is dissipated... | 04/03/2007 |
| 7198528 | Motor unit for a ship An arrangement of a ship's propulsion unit includes a motor unit with a motor housing arranged in the water. A motor and related controls are provided in the motor housing. A propeller is arranged at an end of a motor shaft. The motor unit includes an electrical mot... | 04/03/2007 |
