Shear claw bit
AssigneeVarel International Ind., L.P.
InventorWilliam W. King
Life of this patent
Estimating the term…
Abstract
A shear claw drill bit includes a bit body and a plurality of pick receptacles fixedly attached to the bit body. Each pick receptacle has a pick cavity. The shear claw drill bit further includes a plurality of picks. Each pick has a cutter cavity. The shear claw drill bit also includes a plurality of polycrystalline diamond compact (PDC) cutters. Each PDC cutter is disposed in the cutter cavity of a respective pick of the plurality of picks. A portion of each PDC cutter protrudes out of the cutter cavity of the respective pick.
Claims28
A shear claw drill bit, comprising:
- a bit body;
- a plurality of pick receptacles fixedly attached to the bit body, wherein each pick receptacle has a pick cavity;
- a plurality of picks, wherein each pick is disposed in the pick cavity of a respective pick receptacle of the plurality of pick receptacles and wherein each pick has a cutter cavity;
- and
- a plurality of polycrystalline diamond compact (PDC) cutters, each PDC cutter disposed in the cutter cavity of a respective pick of the plurality of picks, wherein a portion of each PDC cutter protrudes out of the cutter cavity of the respective pick.
A method of fabricating a shear claw drill bit, the method comprising:
- attaching pick receptacles to a bit body, the picks having pick cavities;
- placing picks in the pick cavities, the picks having cutter cavities, wherein the picks are removably attached to the pick receptacles;
- placing PDC cutters in the cutter cavities;
- and
- attaching the PDC cutters to the picks within the cutter cavities.
A shear claw drill bit, comprising:
- a bit body having a bit face;
- a plurality of columns extending out from the bit face, the plurality of columns having cutter cavities that are distal from the bit face, wherein the bit body and the plurality of columns are made from a single structure;
- and
- a plurality of cutters disposed in the cutter cavities, wherein a portion of each cutter of the plurality of cutters protrudes out of a cutter cavity.
A method of fabricating a shear claw drill bit, the method comprising:
- carving out columns from a steel structure such that the columns protrude out from a portion of the steel structure, the portion of the steel structure defining a bit body of the shear claw drill bit;
- removing column portions of the columns to form cutter cavities in the columns, the cutter cavities being distal from the bit body;
- placing cutters in the cutter cavities;
- and
- attaching the cutters placed in the cutter cavities to the columns.
Dependencies are inferred from the claim text.