Rotational Drill Bits and Drilling Apparatuses Including the Same
AssigneeDover BMCS Acquisition Corporation
InventorsE. Sean Cox, Russell Roy Myers
Life of this patent
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Abstract
A roof-bolt drill bit. The roof-bolt drill bit may include a bit body rotatable about a central axis and at least one cutting element coupled to the bit body. The bit body may comprise a forward end, a rearward end axially opposite the forward end, and an internal passage defined within the bit body, with the internal passage extending to at least one opening defined in a side portion of the bit body. The bit body may also comprise a channel defined in a peripheral portion of the bit body, with the channel extending along a path between the rearward end of the bit body and a side portion of the bit body.
Claims23
A roof-bolt drill bit, the roof-bolt drill bit comprising:
- a bit body rotatable about a central axis, the bit body comprising:
- a forward end;
- a rearward end axially opposite the forward end;
- an internal passage defined within the bit body, the internal passage extending to at least one opening defined in a side portion of the bit body;
- at least one channel defined in a peripheral portion of the bit body, the at least one channel extending along a path between the rearward end of the bit body and a side portion of the bit body;
- at least one cutting element coupled to the bit body, the at least one cutting element comprising:
- a cutting face;
- a cutting edge adjacent the cutting face.
A roof-bolt drill bit, the roof-bolt drill bit comprising:
- a bit body rotatable about a central axis, the bit body comprising:
- a forward end;
- a rearward end axially opposite the forward end;
- an internal passage defined within the bit body, the internal passage extending from a rearward opening defined in the rearward end of the bit body through at least a portion of the bit body;
- at least one side passage defined within a portion of the bit body radially offset from the internal passage, the at least one side passage extending from the internal passage to a side opening defined in a side portion of the bit body;
- at least one cutting element coupled to the bit body, the at least one cutting element comprising:
- a cutting face;
- a cutting edge adjacent the cutting face;
- wherein the side opening is formed adjacent the at least one cutting element.
A roof-bolt drilling apparatus, the roof-bolt drilling apparatus comprising:
- a drill steel rotatable about a central axis;
- a bit body coupled to the drill steel and rotatable about the central axis, the bit body comprising:
- a forward end;
- a rearward end axially opposite the forward end, the bit body being coupled to the drill steel at the rearward end of the bit body;
- an internal passage defined within the bit body, the internal passage extending from an opening in the rearward end of the bit body through at least a portion of the bit body in a direction substantially parallel to the central axis;
- at least one flow path defined in a portion of the bit body located radially outward relative to the internal passage, the at least one flow path being configured to direct a fluid in a nonparallel direction relative to the central axis;
- at least one cutting element coupled to the bit body, the at least one cutting element comprising:
- a cutting face;
- a cutting edge adjacent the cutting face.
Dependencies are inferred from the claim text.