Patent ID: 6986650

Claim:
An apparatus for pumping fluid within a borehole, comprising: a housing; a barrier wall dividing an interior of the housing into a first cavity and a second cavity, wherein the second cavity is hermetically sealed; a laterally extendable sensor coupled with an inflatable bellows a rotor assembly comprising an armature rotatably mounted within the first cavity, carrying at least one permanent magnet and having an impeller secured thereto; a plurality of electromagnetic coils disposed circumferentially about the armature; a static shell substantially disposed about the rotor assembly, wherein a portion of the static shell is disposed between the electromagnetic coils and the armature, and wherein the static shell defines a common volume about the armature and the impeller such that fluid may flow within the common volume about both the armature and the impeller; and electronic controls contained within the second cavity and configured to fire the electromagnetic coils in an orbital manner.