Timed Steering Nozzle on a Downhole Drill Bit
OwnerDavid R. Hall, Jonathan Marshall +1inventors
InventorsDavid R. Hall, Jonathan Marshall, Scott Dahlgren
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Abstract
In one aspect of the present invention, a downhole rotary steerable system comprises a fluid path defined by a bore formed within a drill string component. A valve located within a wall of the bore which hydraulically connects the bore with a fluid cavity. A steering nozzle disposed on the drill string component and in communication with the fluid cavity. The valve is configured to control flow from the bore to the fluid cavity with an azimuthal sensing mechanism configured to determine the azimuth of the steering nozzle and instrumentation configured to control the valve based off of input from the azimuthal sensing mechanism.
Claims17
A downhole rotary steerable system, comprising:
- a fluid path defined by a bore formed within a drill string component;
- a nozzle disposed on the drill string component and configured to direct fluid towards a downhole formation;
- an expandable element supported by the drill string component and configured to engage the downhole formation;
- a valve disposed within the bore and in fluid communication with the bore and a fluid cavity;
- wherein the fluid cavity is in fluid communication with both the nozzle and a mechanism for extending the expandable element;
- and
- wherein the nozzle is configured to erode a portion of the formation's wall away forming an eroded area, and the expandable element is configured to urge the drill string component into the eroded area.
(canceled)
Dependencies are inferred from the claim text.