Unité de pompe actionnée électriquement

Elektrisch angetriebene Pumpeinheit

Electrically powered pump unit


A single or double acting reciprocating pump has a plunger (12) constituted as the rotor of a linear electric motor, the stator being constituted by the pump casing in which the plunger (12) moves. The plunger (12) can be annular, the casing can then have a core around which the plunger is received, and rotor and stator windings (17, 15) can then be provided at either or both of inner and outer faces of the plunger (12). The plunger (12) can extend into a pump end of the pump through a seal (27) from a driving end in which the motor is located, the driving end being oil-filled. The pump is suitably embodied for use in a pipe stack in a fluid extraction apparatus.




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Patent Citations (6)

    Publication numberPublication dateAssigneeTitle
    DE-2903817-A1August 07, 1980Siegfried Dr Ing KofinkElektromagnetische kolbenpumpe fuer fluessige und gasfoermige medien
    FR-2106841-A5May 05, 1972Saporta Jose
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NO-Patent Citations (1)

    PATENT ABSTRACTS OF JAPAN, unexamined applications, field M, vol. 7, no. 71, March 24, 1983 THE PATENT OFFICE JAPANESE GOVERNMENT, page 73M202; JP-A-57 212 382 ( NIPPON DENSHIN )

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    EP-0310254-A3May 30, 1990Framo Developments (U.K.) LimitedUnité de pompe volumétrique alternative
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    WO-2014044334-A3September 18, 2014Statoil Petroleum AsImproved pump for lifting fluid from a wellbore
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