Drill Bit Porting System
AssigneeSchlumberger Technology Corporation
InventorsDavid R. Hall, Scott Dahlgren, Jonathan Marshall
Life of this patent
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Abstract
In one aspect of the present invention a drill bit has a jack element with a distal end extending beyond a working face. A porting mechanism within the bore comprises first and second discs contacting along a flat interface. The first disc is attached to a turbine which is adapted to rotate the first disc with respect to the second disc. The discs comprise a first set of ports adapted to align and misalign with each other as the first disc rotates. The first set of ports is adapted to route a drilling fluid to extend the jack element.
Claims20
A drill bit, comprising;
- a jack element substantially coaxial with an axis of rotation of the drill bit, the jack element comprises a distal end extending beyond a working face of the drill bit;
- a porting mechanism disposed within the bore comprising a first and second disc substantially contacting along a flat interface substantially normal to the axis of rotation;
- the first disc attached to a turbine which is adapted to rotate the first disc with respect to the second disc;
- and
- the discs comprise a second set of ports adapted to align and misalign with each other as the first disc rotates, the second set of ports being adapted to route a drilling fluid into the porting mechanism and to extend the jack element further beyond the working surface of the drill bit.
A method for porting a fluid, comprising the steps of;
- providing a first disc attached to a turbine which is adapted to rotate the first disc with respect to a second disc;
- rotating the first disc and the second disc relative to one another;
- allowing fluid to flow through a first set of ports and exhaust through a second set of ports as the first and second disc rotate.
Dependencies are inferred from the claim text.