Patent ID: 8474529
Filing Date: 2013-07-02
Classification: A61P,E21B

Abstract:
1. An apparatus for rotating a continuous tube that extends from a surface down in a subterranean well or bore comprising: at least one continuous cylindrical inner tube extending down in a subterranean well or bore; at least one concentric continuous cylindrical outer tube extending down in a subterranean well or bore having a larger diameter than said inner tube so that said outer tube surrounds said inner tube and is spaced therefrom; at least one elliptical lobe extending from an outer surface of said inner tube; and at least one diameter restriction on an inner surface of said outer tube in order to engage said elliptical lobe upon rotation of one of said tubes, wherein said inner tube and said at least one elliptical lobe move axially with respect to said outer tube during said rotation.