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US 2019/0153831 A1Published application
Linear electric submersible pump unit
OwnerDmytro KHACHATUROVinventor
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OwnerDmytro KHACHATUROVinventor
Estimating the term…
An invention relates to a field of oil production, in particular, to installations with displacement pumps driven by submersible linear electric motors, and can be used for production of stratum fluids from a marginal well stock from great depths. The described technical solution implementation ensures unification of a design with simultaneous increase in a manufacturing processability by means of involving of easily removable interoperable modules for its manufacture. Also a described embodiment contributes to decrease in a pump unit dimensions. According to the described embodiment of the invention a telemetry system performance provides an increase in a level of protection from a high-voltage interference with implementation of a hardware-software mode of a surface control unit for checking an insulation. Providing that an arrangement of the described design ensures a reduction in dynamic loads on elements of an electrical motor design and contributes to increase in its operating resource.
A linear electric submersible pump unit connected to a surface control unit, comprising a linear submersible electric motor with a hydraulic compensator and a damping system, as well as a connected pump module with integrated filters and a gravity gas separation zone, a telemetry system that includes a set of measuring sensors of well and motor parameters connected with the surface control unit via a zero point of wye-connected linear motor windings, while the surface control unit is performed as a three-phase high-frequency regulating inverter and an output transformer connected to the linear submersible electric motor by means of an insulated three-wire cable, distinctive in that the pump unit is made in a form of separately enclosed modules connected to each other by means of a detachable connection forming a single oil-filled system comprising a linear motor module connected by a cable line to the surface control unit by means of a hermetically sealed plug and socket connection arranged beyond an input lead end on an extended electrical conductor, a hydraulic compensator module is installed at a base of the electric motor, comprising an elastic diaphragm, an internal cavity of which is performed in fluid communication with a linear electric motor stator cavity by means of a connecting channel passing at attachment points of the elastic diaphragm, while the said channel constitutes a part of an oil line, filling the linear electric submersible pump unit, comprising a cavity with wires of communication with the surface control unit connected to a submersible module of the telemetric system with implemented hardware-software mode of the surface control unit for checking an insulation, while the hydraulic compensator module comprises a hydromechanical damper of a lowest end point of a moving part stroke of a linear drive, which constitutes an element of a damping system, that also contains a damper of a highest end point placed in a separate enclosure and installed between the linear electric motor module and the pump module.
A linear electric submersible pump unit connected to a surface control unit, comprising a linear submersible electric motor with a hydraulic compensator and a damping system, as well as a connected pump module with integrated filters and the gravity gas separation zone and a telemetry system, containing a set of measuring sensors of well and motor parameters connected with the surface control unit via the zero point of wye-connected linear motor windings, while the surface control unit is performed as a three-phase high-frequency regulating inverter and an output transformer, connected to the linear submersible electric motor by means of an insulated three-wire cable, distinctive in that the damping system comprises at least one hydromechanical dynamic load compensating device installed in at least one of an end points of the movable part of the linear drive, that consists of a cylindrical chamber with drain ports filled with a working fluid and a movable hollow piston and reciprocating support member with a spring element installed therebetween, while the said cylindrical chamber is configured to be filled with the working fluid from an ambient medium of the pumping unit.
A linear electric submersible pump unit connected to a surface control unit, comprising a linear submersible electric motor with a hydraulic compensator and a damping system, as well as a connected pump module with integrated filters and a gravity gas separation zone, a telemetry system that includes a set of measuring sensors of well and motor parameters connected with the surface control unit via a zero point of wye-connected linear motor windings, while the surface control unit is performed as a three-phase high-frequency regulating inverter and an output transformer connected to the linear submersible electric motor by means of an insulated three-wire cable, distinctive in that is distinctive in that a movable part of the linear submersible motor is connected to a plunger of the pump module by means of a connecting link consisting of a friction couple formed by a hollow enclosure element with a movable rod located inside having a diameter equal to a diameter of the moving part of the linear submersible electric motor, wherein longitudinal dimensions and a stroke length of the movable rod are selected in such a way as to provide at least partial positioning of the movable part of the linear submersible electric motor within an enclosure element cavity of the friction couple.
Dependencies are inferred from the claim text.