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US 9,790,749 B2Granted
Downhole drilling tools including low friction gage pads with rotatable balls positioned therein
AssigneeHalliburton Energy Services, Inc.
InventorShilin Chen
Life of this patent
Estimating the term…
Abstract
In accordance with some embodiments, a downhole drilling tool comprises a bit body, a blade on an exterior portion of the bit body, and a gage pad on the blade. The gage pad includes a ball retainer and a ball located in the ball retainer such that an exposed portion of the ball is positioned to contact a wellbore and rotate in response to frictional engagement with the wellbore.
Claims16
A downhole drilling tool, comprising:
- a bit body;
- a blade on an exterior portion of the bit body;
- a gage pad on the blade, the gage pad including an uphole gage portion having a positive axial taper extending to an uphole edge of the gage pad;
- a ball retainer in the gage pad;
- and
- a ball located in the ball retainer such that an exposed portion of the ball is positioned to contact a wellbore and rotate in response to frictional engagement with the wellbore.
3 more elements
A downhole drilling tool, comprising:
- a bit body;
- a blade on an exterior portion of the bit body;
- and
- a gage pad on the blade, the gage pad including:
- a downhole gage portion including a surface to contact adj acent portions of a wellbore;
- and
- an uphole gage portion including a ball retainer and a ball located in the ball retainer such that an exposed portion of the ball is positioned to contact the wellbore and rotate in response to frictional engagement with the wellbore, the uphole gage portion having a positive axial taper extending to an uphole edge of the gage pad.
4 more elements
Dependencies are inferred from the claim text.