Back to results
US 7,730,975 B2Granted
Drill bit porting system
AssigneeSchlumberger Technology Corporation
InventorsDavid R. Hall, Scott Dahlgren, Jonathan Marshall
Life of this patent
Estimating the term…
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.
Claims16
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;
- wherein the jack element is attached to a shaft adapted to rotate.
3 more elements
Dependencies are inferred from the claim text.