Drill bit having shear and pick-type cutters
AssigneeShear Bits, Ltd.
InventorsJohn James Herman, Dallas Wilkins, Ryan J. C. Marley, Timothy P. Beaton
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Abstract
A drill bit includes a bit body defining a plurality of blades extending from a selected distance from an axis of rotation of the bit body to a gage face. A plurality of only gouging cutters is mounted on the bit body. At least one of the plurality of blades has a blade top surface longitudinally behind the tips of the gouging cutters at a selected distance from the tips of the gouging cutters.
Claims29
A drill bit, comprising:
- a bit body having a plurality of gouging cutters mounted on the bit body;
- a plurality of blades extending from a selected distance from an axis of rotation of the bit body to a gage face;
- and
- at least one of the plurality of blades comprising a plurality of shear cutters affixed thereon, wherein the gouging cutters extend a selected distance longitudinally ahead of a cutting surface defined by the shear cutters and wherein the gouging cutters are mounted to the bit body rotationally ahead of the shear cutters.
The bit of claim 41 wherein the cutting tip is made from at least one of tungsten carbide, diamond impregnated tungsten carbide, cubic boron nitride, polycrystalline diamond.
A drill bit, comprising:
- a bit body having a plurality of gouging cutters mounted on the bit body;
- a plurality of blades extending from a selected distance from an axis of rotation of the bit body to a gage face;
- and
- at least one of the plurality of blades comprising a plurality of shear cutters affixed thereon, wherein the gouging cutters are mounted to the bit body rotationally ahead of the shear cutters.
Dependencies are inferred from the claim text.