LINEAR DRIVE SYSTEM FOR DOWNHOLE APPLICATIONS

摘要

An apparatus for use in a borehole may include a rotor having at least one set of magnetic elements and a cylindrical stator having a winding flowing current in a direction transverse to a long axis of the stator. The polarity of each magnetic element of the rotor may be arranged to alternate along a long axis of the rotor. The stator may be in sliding engagement with the rotor and have a core formed at least partially of laminations aligned along a plane co-planar with the long axis of the stator. Energizing the winding principally causes relative sliding between the rotor and the stator. A method for performing an operation in a borehole includes forming a well tool having at least one linear motor as described above, conveying the linear motor into the borehole, and operating a well tool by activating the linear motor.

主权项

1. An apparatus for use in a borehole, comprising:
a rotor having at least one set of magnetic elements, wherein a polarity of each magnetic element is arranged to alternate along a long axis of the rotor; and a cylindrical stator in sliding engagement with the rotor, the stator having a winding flowing current in a direction transverse to a long axis of the stator, the stator having a core formed at least partially of laminations aligned along a plane co-planar with the long axis of the stator, wherein energizing the winding causes relative sliding between the rotor and the stator, the sliding being principally along the long axis of the rotor.