Abstract: 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 rotates around it; magnetic field generation means which are fixed in the housing and interact with the armature winding to generate electromagnetic torque; a fixed collector which is electrically connected to the armature winding; brushes which rotate around the fixed collector and are connected to the external electric circuit. The fixed collector and the brushes rotating around it are enclosed in an insulating chamber. The technical result consists in the elimination of the risk of a short circuit between the brushes and the collector of the direct-current motor when it is used as a submersible motor.

Abstract: A fuel pump includes a pump portion for pumping fuel. The fuel pump further includes a magnet having magnetic poles circumferentially alternate with each other. The fuel pump further includes an armature on a radially inside of the magnet. The armature includes a rotor core provided with a coil formed of a wire. The armature is rotatable for driving the pump portion. A commutator, which is in a substantially disc shape, is provided to an axial end of the armature for rectifying electricity supplying to the coil. The rotor core has an axial end having an outer circumferential periphery defining a commutator-side collar portion extending toward the commutator. The coil is formed by winding the wire between an outer circumferential periphery of the commutator and the commutator-side collar portion.

Abstract: An electrical submersible pump assembly has a motor cooperatively engaged with a pump for driving the pump and a motor lead extending to the motor for supplying power to the motor. The motor lead has an electrical conductor enclosed within a tube. The tube is sealed from an exterior environment of the motor and contains a dielectric fluid. The motor may be filled with a dielectric lubricant and the interior of the tube of the motor lead may be in fluid communication with the dielectric lubricant. Alternatively, the motor may filled with a dielectric lubricant and the dielectric fluid within the interior of the tube of the motor lead may be sealed from the dielectric lubricant.

Abstract: A pressure compensated dynamic seal assembly (26) for a deep submergence actuator (10). A pressure compensated isolation fluid (28) is supplied to an isolation region (34) established between a pair of opposed dynamic seals (36, 38) about a linear actuator ram (14). The isolation region is maintained at a pressure higher than an exterior fluid pressure surrounding the actuator so that any leakage past the first dynamic seal (36) will be in a direction out of the actuator, thereby avoiding any ingress of exterior fluid into the actuator. Leakage past the lower dynamic seal (38) can be tolerated because the isolation fluid is compatible with components of the drive mechanism (20) disposed within the interior (24) of the actuator. A load-bearing bushing (40) may be located between the first and lower seals.

Abstract: 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.

Abstract: A turbine assembly comprising a blade assembly having a plurality of curved blades with an inner end of each of the curved blades terminating at a cavity. The cavity has an open side with a generator located within the cavity and coupled to the blade assembly. The turbine assembly is suitable for underwater use. Multiple turbine assemblies may be connected to form a power generation station.

Abstract: A generator (10) is provided for positioning downhole in a drill string (12) to generate power powering one or more downhole tools (16). The generator includes a progressive cavity housing (28) and a progressive cavity rotor (30) which rotates in response to fluid passing through the progressive cavity housing. A restriction (36) in the annulus downstream from the ports controls the fluid flow in the annulus and past the restriction, and thereby the fluid flow through the progressive cavity housing. The generator may provide either hydraulic or electrical power, or both, powering the one or more tools.

Abstract: According to an embodiment, a submersible electric motor assembly has: a casing; an electric motor that is accommodated in the casing; and an electric insulating substance that is filled between the electric motor and the casing and has a thermal conductivity higher than that of air. The electric motor includes: a stator, a rotor that is rotated by an interaction with a magnetic field of the stator, a coil that magnetizes the stator and/or the rotor, and a shaft that is rotated by rotation of the rotor.

Abstract: A system and method is used to protect a motor of a submersible pumping system. A variety of motor protector features are provided to facilitate operation of the motor protector and submersible pumping system in multiple wellbore environments and applications.

Abstract: An impulse rotor generator is provided for generating power in response to a primary mud flow in a drill string. The generator comprises a power rotor, at least one stationary magnetic pickup, and a pickup coil mounted on the at least one stationary magnetic pickup. The power rotor is positioned at least in part in the primary mud flow and is rotatable in response to the primary mud flow, the power rotor having an axis of rotation that is transverse to said primary mud flow. The power rotor is provided with a plurality of magnets affixed thereto, the magnets being arranged so as to magnetically couple with the at least one stationary magnetic pickup. Upon rotation of the power rotor in response to the primary mud flow, a current is produced in the pickup coil mounted on the at least one stationary magnetic pickup.

Abstract: A motor that includes a motor frame, an end-bell assembly, a stator assembly, and filling material is described. The stator assembly is placed within the frame such that at least one open area is defined between an inner diameter of the stator assembly and an inner diameter of the motor frame. The at least one end-bell assembly is attached to the motor frame, forming an inside area adjacent the motor frame and the stator assembly. The motor also includes a material configured to fill the at least one open area and the inside area of the at least one end-bell assembly for the purpose of sealing the stator assembly and the inside area associated with the at least one end-bell assembly. The material assists in a bonding and attachment between any two or more of the stator assembly, the motor frame, and the at least one end-bell assembly.

Abstract: A submersible power generation plant includes a water turbine standing freely on a support structure in an ambient flow; an electric generator which is driven at least indirectly by the water turbine; at least one generator component of the electric generator is enclosed by at least one corrosion protection element which seals against ambient water, with cavities within the corrosion protection element each being filled with a heat-conductive medium; at least one pass-through duct being provided for dissipating waste heat from the electric generator, which the pass-through duct conducts the ambient water and leads through the corrosion protection element without entering into any material exchange with a region encapsulated by the corrosion protection element, and a growth protection system arranged on a flow input of the pass-through duct on an upstream side.

Abstract: 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 includes a lubricating oil that includes a base hydrocarbon oil and a plurality of nanoparticles. Also provided is an improved lubricant oil and method of preparation thereof are provided. The lubricant oil includes a hydrocarbon containing base oil and a plurality of nanoparticles. The nanoparticles may be present in an amount up to 30% by volume.

Abstract: According to one or more aspects of the present disclosure, a motor protector comprises a housing defining a compensator chamber; a compensator disposed in the housing having a motor fluid end in fluid communication with a motor fluid and a well fluid end, the compensator axially moveable relative to the housing in response to the expansion and contraction of the motor fluid; and a port formed through the housing to provide fluid communication from exterior of the housing to the well fluid end of the compensator. The compensator may be one selected from the group of a bellows and a plunger.

Abstract: An electric submersible pump (ESP) motor includes a polymer or ceramic component made by curing a thermosetting polymer in situ in the ESP motor, wherein the thermosetting polymer is selected from the group consisting of cyanate ester, bismaleimide, polyimide, benzoxazine, a preceramic polymer, and a mixture thereof, or the thermosetting polymer is a hybrid polymer having less than 50% by weight of an epoxy component and a second component selected from the group consisting of cyanate ester, bismaleimide, polyimide, benzoxazine, a preceramic polymer, and a mixture thereof.

Abstract: 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 motor and to reduce differential pressures between the internal motor fluid and the external well fluid. The motor protector incorporates a piston slidably sealed within an interior cavity of the motor protector for movement to reduce undue differential pressures.

Abstract: A rotor assembly comprising: an inner rotor and an outer rotor for rotating in a magnetic field of a motor, the inner rotor comprising a main inner rotor cavity, and a plurality of first holes being formed between the inner rotor and the outer rotor; two side boards, each side board having a main side board cavity, and being perforated by a plurality of second holes; two damping elements each damping element comprising a main damping element cavity; a plurality of rubber sleeves, each rubber sleeve having a rubber sleeve lip; and a plurality of third holes; an axle; and a plurality of positioning pins.

Abstract: An electrical connector assembly for a cable having a plurality of insulated conductors comprises a body having a respective recess for receiving a terminating pin each of the conductors. A respective spigot sealingly engages within each of the recesses and has a passage for receiving an associated one of the terminating pins. Furthermore a seal is associated with each of the spigots for sealing the spigot relative to the associated terminating pin. The provision of a separate spigot for each of the conductors and for sealing engagement within a respective recess in the body enables the spigots to be sealingly fitted to the conductors prior to each spigot being introduced into its recess and sealingly engaged therein. This provides improved insulation of the conductor and increased creepage distance between the mating electrical parts and the outer surface of the housing of the assembly.

Abstract: A fluid pump system comprises an electrical drive unit and a rotary pump comprising a rotatable shaft and a drive element formed from a number of impellers attached to the shaft for causing flow within a process fluid. The electrical drive unit comprises an electrical stator and an electrical rotor attached to the shaft via a coupling, the electrical stator being disposed adjacent to the electrical rotor. The electrical stator is disposed within a first casing and the rotary pump and the electrical rotor are disposed within a second casing. The first casing contains a first fluid and the second casing contains a second fluid.

Abstract: Electronic control system for a submarine actuator, said actuator comprising a container body, from which a drive shaft projects that is suitable for inserting in a seat of said submarine device. The system comprises an electronic control board for at least one electric motor arranged inside said container body suitable for moving said drive shaft.

Abstract: 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 mounted on, and spaced around the circumference of, a rotating drilling sub, and a stator made up of a multiplicity of permanent magnets also spaced around the circumference of the drilling sub. The stator is mounted on the drilling sub by means of bearings and incorporates a counterweight that holds the rotor relatively stationary with respect to the sub and with respect to the coils, so that rotation of the sub, either by rotation of the drillstring or by rotation of a drill motor in the drilling sub, produces relative rotation of the rotor and stator to generate an AC electrical output.

Abstract: A magnet embedded motor includes a rotor, a plurality of magnets embedded in the rotor, and a yoke provided with the plurality of magnets for forming a magnetic path. The rotor is formed with the plurality of magnets and the yoke in a single member by means of a resin molding by making the plurality of magnet and the yoke as an insertion body.

Abstract: 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 orifice and a plurality of lamination slots. A plurality of magnet wires pass through each of the plurality of lamination slots formed by the stacked plurality of stator laminations. Shrink wrap surrounds each of the plurality of magnet wires to secure the magnet wires in bundles. The result is that the wires are effectively bound together in a manner that allows oil to move freely inside the lamination slots surrounding the wire bundles. Since fluid can pass between and around the windings, the overall winding temperature will be normalized, essentially reducing hot spots that occur in prior art designs.

Abstract: A sealing element for isolating or sealing off a component or structure of an injection or administering device from other components or structures of the device or from the surroundings, wherein the isolated component or structure is an electrical component. The invention encompasses methods of forming and using the sealing element, and an injection or administering device including the sealing element.

Abstract: A flat vibration motor is provided. The flat vibration motor includes a rotor portion, a stator portion, a fixing mount, a pair of terminals, and a base portion. The rotor portion generates vibrating force when rotating. The stator portion houses and couples with the rotor portion to allow the rotor portion to rotate. The fixing mount extends from a side of a lower case of the stator portion. Each terminal includes a contacting portion, an elastic portion, and a joining portion. The base portion forms a plurality of supporting holes through which each of the terminals respectively passes. The joining portion of the terminal connects electrically to the circuit board through a peripheral lower surface around the supporting hole, when the base portion and the fixing mount are coupled.

Abstract: An electrical connector assembly for a cable having a plurality of insulated conductors comprises a body having a respective recess for receiving a terminating pin each of the conductors. A respective spigot sealingly engages within each of the recesses and has a passage for receiving an associated one of the terminating pins. Furthermore a seal is associated with each of the spigots for sealing the spigot relative to the associated terminating pin. The provision of a separate spigot for each of the conductors and for sealing engagement within a respective recess in the body enables the spigots to be sealingly fitted to the conductors prior to each spigot being introduced into its recess and sealingly engaged therein. This provides improved insulation of the conductor and increased creepage distance between the mating electrical parts and the outer surface of the housing of the assembly.

Abstract: A hollow ring torus permanent magnet generator, with a sphere shaped permanent magnet which spins/revolves within the hollow ring torus passing through insulated copper magnet wire windings which are wound around the exterior portion of the ring torus shaped body which, has two or more coils that said sphere magnet passes through forcing electrons through insulated copper coils which, produces electrical current sufficient to power light emitting diodes or a number of low voltage electrical device. Can be encapsulated within a number of devices i.e., flashlight body, fishing lure body or mounted on the axis of a device i.e., spinning fan blade, tire to produce low voltage as the device spins or moves in a rolling motion allowing the sphere magnet to pass through the insulated copper coil windings.

Abstract: 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 connecting the auxiliary tool with the motor and may include a hydraulic connector that maintains the fluid in the motor when connecting or disconnecting the auxiliary tool and provides fluid communication of the fluid between the motor and a terminal area when the auxiliary tool is connected.

Abstract: In the case of a fuel pump, a plug for fixing electric contacts is manufactured from a material which is capable of swelling with fuel, and is inserted into a receptacle of a connecting piece by being fitted therein. Furthermore, the plug and the connecting piece have latching means for simplifying the pre-assembly. The connecting piece requires a particularly low number of components and can be manufactured cost-effectively.

Abstract: A submersible pumping system for use downhole, wherein the system includes a pump and a pump motor for driving the pump. The pump motor includes a housing with corresponding stator and rotor lamination stacks disposed within the housing. Also included with the pump motor is an anchoring system for axially securing the stator lamination stack within the motor housing.

Abstract: A pump comprises a base (10), a case (20) fixed on the base, a rotor (30) received between the case and the base, and an inner stator (40) and an outer stator (50) accommodated in the case. The rotor is sandwiched between the inner stator and the outer stator. When the inner stator and the outer stator are energized to generate respective magnetic fields, the rotor is driven to rotate by turning torques that are produced by mutual actions between the rotor and the magnetic fields. Thus, the interior and exterior magnetic fields of the rotor can be utilized sufficiently, and an operation efficiency of the pump is enhanced accordingly.

Abstract: A pumping system including a first section and a second section. The first section includes a first housing having an axial bore formed therethrough and a protruding member formed on one end of the first housing, and a first shaft arranged within the axial bore of the first housing. The second section include a second housing having an axial bore formed therethrough and a recess formed on one end of the second housing for receiving the protruding member of the first housing, and a second shaft arranged within the axial bore of the second housing. An apparatus for compensating oil volume change in a motor, including a compensator housing having an open end for connecting to the motor, and a closed end; and a flexible bladder arranged within the housing and connected to the open end of the housing.

Abstract: 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 sleeve affixed to the bracket and holding a winding, a magnetic shaft and fan blade assembly rotatably supported on the locating rod in the sleeve for rotating two fan blades to pump water when the winding is electrically energized, and a controller for controlling the supply of electric current to the winding to control the direction and time of rotation of the fan blades.

Abstract: 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 supported in the tubular axle of the barrel-like holder, magnets equiangularly arranged outside the barrel-like axle holder corresponding to the winding, and a vane disposed outside the housing for moving water, two slotted semispherical caps respectively fastened to the two distal ends of the housing, two guards respectively fastened to the two ends of the housing around the semispherical caps for controlling water flowing angle, and a controller with a timer for controlling forward/backward alternative rotation time of the vane holder.

Abstract: A multi-diameter bellows for use in a seal section of a submersible pump. The bellows is adapted to surround a shaft that communicates the motor with the pump. The bellows is made of a first collapsible section and a second collapsible section. The volume of the bellows is varied by moving a coupling member that attaches the first collapsible section to the second collapsible section. The coupling member has an outside portion for connecting to the second collapsible section and an inside portion for connecting to the first collapsible section. The coupling member additionally has a transitional section between the outside portion and the inside portion. The transitional portion of the coupling member allows the inside portion to be located within the second collapsible section, i.e., allows the collapsible sections to be “nested”, which increases displaced volume for a given stroke length of the coupling member.

Abstract: 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 orifice and a plurality of lamination slots. A plurality of magnet wires pass through each of the plurality of lamination slots formed by the stacked plurality of stator laminations. Shrink wrap surrounds each of the plurality of magnet wires to secure the magnet wires in bundles. The result is that the wires are effectively bound together in a manner that allows oil to move freely inside the lamination slots surrounding the wire bundles. Since fluid can pass between and around the windings, the overall winding temperature will be normalized, essentially reducing hot spots that occur in prior art designs.

Abstract: 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 in which the laminations and windings are imbedded. The windings have a connection to an electronically controlled power supply. An annular rotor in the tube radially surrounding the stator includes a permanent magnet coaxial with the windings. The tube seals the stator and rotor from the environment.

Abstract: A technique is provided for constructing a submersible motor. The submersible motor has a stator positioned within a housing. Windings are arranged through the stator with end coils on opposite ends of the stator. The winding end coils are supported by a support structure that prevents the end coils from collapsing inwardly.

Abstract: 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, the impellers being located in the flow path of the lubricant. A diffuser is located upstream of and adjacent each impeller. The impellers increase the radial velocity of the lubricant, and this velocity is converted into a pressure head at the impeller outlet. The lubricant flows through the first diffuser, through the first impeller, through the second diffuser, and then flows through the second impeller and out into a reservoir. The shaft has an axial flow passage with an outlet at each bearing. The outlet has at least three ports arranged symmetrically around the shaft for discharging lubricant into a clearance between the shaft and bearing to create a fluid film.

Abstract: The invention relates to crude oil production, and can be suitably used for hydroprotection of submersible electric centrifugal motors. A hydroprotection protector of a borehole pump electric motor comprises at least one stage, which stage includes a cylindrical body (7), a tube (8) coaxially positioned inside said body and surrounding a shaft (5), nipples (9, 10), a damping bushing (11), an end-face seal (12) and an annular piston (13), which piston is adapted to reciprocate in an annular chamber (14), which chamber is defined within the space between the cylindrical body (7) and the tube (8). The piston (13) separates the chamber (14) into two areas (15, 16) filled, respectively, with the dielectric fluid and the formation fluid arriving from the annulus.

Abstract: A method of pumping wellbore fluid, comprising the steps of: installing an electric submersible pump in a wellbore; and operating the pump at more than 4,500 rpm to pump the wellbore fluid. Pumping in this manner provides a number of advantages in use in that the required high-speed motor and pump is shorter for a given power than existing arrangements, and provides increased reliability due to reduced complexity. A much shorter motor/pump combination also allows such equipment to be used in deviated boreholes with a reduction in damage due to mishandling and bending, as well as facilitating assembly and testing in the manufacturer's plant.

Abstract: A method of pumping wellbore fluid, comprising the steps of: installing an electric submersible pump in a wellbore; and operating the pump at more than 4,500 rpm to pump the wellbore fluid. Pumping in this manner provides a number of advantages in use in that the required high-speed motor and pump is shorter for a given power than existing arrangements, and provides increased reliability due to reduced complexity. A much shorter motor/pump combination also allows such equipment to be used in deviated boreholes with a reduction in damage due to mishandling and bending, as well as facilitating assembly and testing in the manufacturer's plant.

Abstract: A bottom portion side rib and a flange portion side rib are respectively formed on the bottom portion and the flange portion of the inner cover. The bottom portion side rib includes a plurality of bottom portion side radial ribs and a plurality of bottom portion side circular ring shaped ribs connecting the plurality of bottom portion side radial ribs. The flange portion side rib includes a plurality of flange portion side radial ribs and a flange portion side circular ring shaped rib connecting the plurality of flange portion side radial ribs.

Abstract: 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. The end of the assembling base connecting with the protector has a thrust bearing to support the motor shaft and form a thrust bearing chamber with the seal base of the protector, the shared assembling base has a cooling oil connecting passage, the isolation chamber where the bag is put in is formed between the seal base and assembly head base of the protector, a mechanical seal outside the assembly head base is provided for acting on the main shaft.

Abstract: The invention relates to a motor-pump unit having a wet-running electric motor and a hydraulic pump which is driven by the electric motor. The electric motor has a rotor and a laminated stator core surrounding it. The electric motor is terminated at one end by a connecting cover, and at the opposite end by an end cap. The laminated stator core forms the outer tubular casing of the electric motor, which is bounded at one end by the end cap and at the other end by the connecting cover. The outer surface of the laminated stator core is covered by a shrink sleeve, which overlaps the adjacent outside surfaces of the connecting cover and of the end cap, in a liquid-tight manner.

Abstract: 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 element and a second magnetic element, a sealed annular chamber defined by a first tube (96), and an second tube concentrically inside the first tube. The first and second stators are located in the annular chamber, and the first magnetic elements being aligned with the first stator such that the first stator when energised can act upon the first magnetic element, and the second magnetic element being aligned with the second stator such that the second stator when energised can act upon the second magnetic element.

Abstract: 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 connected to the submersible motor. The expansion chamber and submersible motor are filled with motor oil. The expansion chamber has a housing and a reactant disposed in the housing interior for reacting with and reducing the concentration of contaminants present in the well fluid that are harmful to components of the motor protector.

Abstract: 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 bearings to cool the components. The fluid may have a high electrical resistance to isolate the motor components from any contact with flammable gasses as well as prevent arcs or sparks. The cavity holding the fluid also ensures continuous lubrication by preventing fluid from leaking or evaporating out of the motor.

Abstract: 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 sleeve affixed to the bracket and holding a winding, a magnetic shaft and fan blade assembly rotatably supported on the locating rod in the sleeve for rotating two fan blades to pump water when the winding is electrically energized, and a controller for controlling the supply of electric current to the winding to control the direction and time of rotation of the fan blades.

Abstract: 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. A stator is disposed in a stator chamber formed between the tubular inner member and the tubular housing member. A rotor is disposed in a rotor chamber disposed within the inner member. End walls close opposite ends of the tubular housing member and the tubular inner member. An annular capacitor is disposed in the stator chamber in an axially spaced apart relationship with the stator. The capacitor extends around the rotor chamber. A body of potting compound is disposed in the stator chamber and at least partially encloses the stator and the capacitor.