Downhole tool vibration device and method
AssigneeHalliburton Energy Services, Inc.
InventorChung Chang
Life of this patent
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Abstract
In some embodiments, an apparatus and a system, as well as a method and an article, may operate to select a longitudinal axis within a borehole, and to move a down hole housing using at least one set of rollers attached to the housing to contact a surface of the borehole, so that simultaneous movement with two rotational degrees of freedom is enabled within the borehole. The centerline of the housing can be substantially aligned with a selected longitudinal axis while the housing moves along the selected longitudinal axis. Additional apparatus, systems, and methods are disclosed.
Claims23
An apparatus, comprising:
- a down hole housing;
- and
- at least one set of rollers attached to the housing and having two rotational degrees of freedom, to enable the housing to move simultaneously along and about a longitudinal axis within a borehole in which the housing is disposed, when the at least one set of rollers contacts a surface of the borehole;
- wherein each roller of the at least one set of rollers is compliantly mounted to a frame, each roller having an axle located substantially in line with a substantially circular axis of rotation.
A system, comprising:
- a down hole housing;
- at least one set of rollers attached to the housing and having two rotational degrees of freedom to enable the housing to move simultaneously along and about a longitudinal axis within a borehole in which the housing is disposed when the at least one set of rollers contacts a surface of the borehole, rollers of the at least one set of rollers further including a compliant axle mounted to a frame;
- and
- an extension mechanism controlled by feedback to selectably move a centerline of the housing with respect to the longitudinal axis within the borehole.
A method, comprising:
- selecting a longitudinal axis within a borehole;
- moving a down hole housing using at least one set of rollers attached to the housing to contact a surface of the borehole, so that simultaneous movement of the at least one set of rollers with two rotational degrees of freedom is enabled within the borehole as a centerline of the housing is substantially aligned with the selected longitudinal axis while the housing moves along the selected longitudinal axis;
- and
- moving each roller of the at least one set of rollers about an axle, each roller compliantly mounted to a frame and located substantially in line with a substantially circular axis of rotation.
Dependencies are inferred from the claim text.