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US 2009/0260894 A1Published application
Jack Element for a Drill Bit
AssigneeSchlumberger Technology Corporation
InventorsDavid R. Hall, Francis E. Leany, Joe Fox, Tyson J. Wilde
Life of this patent
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Abstract
In one aspect of the present invention, a drill bit has an axis of rotation and a working face with a plurality of blades extending outwardly from a bit body. The blades form in part an inverted conical region, and a plurality of cutters with a cutting surface is arrayed along the blades. A jack element is coaxial with the axis of rotation and extends within the conical region within a range defined by the cutting surface of at least one cutter.
Claims16
A drill bit, comprising:
- an axis of rotation and a working face comprising a plurality of blades extending outwardly from a bit body;
- the blades forming in part an inverted conical region;
- a cutter attached to the nose of at least one of the plurality of blades;
- and
- a jack element coaxial with the axis of rotation and extending within the conical region within a range defined by the cutting surface of the cutter.
2 more elements
A drill bit, comprising:
- an axis of rotation and a working face comprising a plurality of blades extending outwardly from a bit body;
- the blades forming in part an inverted conical region;
- a cutter comprising a cutting surface is attached to a nose of at least one of the blades;
- and
- wherein the jack element comprises the characteristic of reducing the torque required to rotate the drill bit while downhole and in operation.
2 more elements
Dependencies are inferred from the claim text.