Stick slip tool
AssigneeDownhole Well Solutions, LLC
InventorsAvinash Hariprasad Cuddapah, Michael Dan Billings
Life of this patent
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Abstract
A rotary glide system for a downhole tool includes a ball bearing sleeve comprising a first plurality of helical grooves formed into an inner surface of the ball bearing sleeve, a shaft comprising a bearing section having a second plurality of helical grooves formed into an outer surface of the shaft, the shaft configured to extend through the ball bearing sleeve, and a plurality of ball bearings disposed within a plurality of channels formed by the first and second pluralities of helical grooves.
Claims16
A rotary glide system for a downhole tool, the rotary glide system comprising:
- a ball bearing sleeve comprising a first plurality of helical grooves formed into an inner surface of the ball bearing sleeve;
- a shaft comprising a bearing section having a second plurality of helical grooves formed into an outer surface of the shaft, the shaft configured to extend through the ball bearing sleeve;
- and
- a plurality of ball bearings disposed within a plurality of channels formed by the first and second pluralities of helical grooves,
- wherein rotation of the ball bearing sleeve relative to the shaft changes a length of the rotary slide system.
A stick slip tool comprising:
- a rotary slide system comprising:
- a ball bearing sleeve comprising a first plurality of helical grooves formed into an inner surface of the ball bearing sleeve;
- a shaft comprising a second plurality of helical grooves formed into an outer surface of the shaft, the shaft configured to extend through the ball bearing sleeve;
- a plurality of ball bearings disposed within a plurality of channels formed by the first and second pluralities of helical grooves;
- a spring mandrel coupled to the shaft;
- and
- a spring stack situated around the spring mandrel,
- wherein the spring stack resists axial motion of the spring mandrel, and
- wherein a length of the stick slip tool is reduced in the presence of a reactionary torque.
Dependencies are inferred from the claim text.