Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1991-02-01
1992-06-02
Neuder, William P.
Boring or penetrating the earth
Processes
Boring curved or redirected bores
175 74, 1753252, E21B 708
Patent
active
051179270
ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a downhole adjustable apparatus for creating a bend angle in a drill string includes a mandrel mounted for rotation between first and second angular positions within a housing, the mandrel being telescoped into the housing on an axis that is inclined with respect to the principle axial centerline of the housing, so that in one rotational position of the mandrel the housing is axially aligned with the centerline of a drilling motor and in another rotational position that is 180.degree. from the initial position the housing is slightly inclined with respect to the centerline of such drilling motor to establish a bend angle. Further manipulation of the mandrel is used to return the members to their original positions for straight-ahead drilling.
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Anadrill
Moseley David L.
Neuder William P.
Ryberg John J.
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