Rotational drill bits and drilling apparatuses including the same
AssigneeDover BMCS Acquisition Corporation
InventorE. Sean Cox
Life of this patent
Estimating the term…
Abstract
A roof-bolt drill bit. The roof-bolt drill bit may include a bit body rotatable about a central axis and a cutting element coupled to the bit body. The bit body may comprise a forward end, a rearward end axially spaced away from the forward end, and an internal passage defined within the bit body, with 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. A fluid port is configured to direct fluid from the internal passage through a port opening in a direction that forms an angle with respect to a forward direction of the central axis.
Claims18
A roof-bolt drill bit comprising:
- a bit body rotatable about a central axis, the bit body comprising:
- a forward end;
- a rearward end axially spaced away from 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;
- a fluid port extending from the internal passage to a port opening defined in the bit body;
- a cutting element coupled to the bit body, the cutting element comprising:
- a cutting face;
- a cutting edge adjacent to the cutting face;
- a trailing surface spaced away from the cutting face, the trailing surface being mounted to the bit body;
- wherein the port opening is positioned adjacent to the trailing surface of the cutting element.
A roof-bolt drill bit comprising:
- a bit body rotatable about a central axis, the bit body comprising:
- a forward end;
- a rearward end axially spaced away from 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;
- a fluid port defined within a portion of the bit body radially offset from the internal passage, the fluid port extending from the internal passage to a port opening defined in the bit body;
- a cutting element coupled to the bit body, the cutting element comprising:
- a cutting face;
- a cutting edge adjacent to the cutting face;
- wherein the fluid port is configured to direct fluid from the port opening in a direction that forms an angle with respect to a forward direction of the central axis.
A roof-bolt drill bit comprising:
- a bit body rotatable about a central axis, the bit body comprising:
- a forward end;
- a rearward end axially spaced away from the forward end;
- two cutting element support structures, each of the two cutting element support structures comprising a mounting surface;
- two cutting elements, each of the two cutting elements being mounted to a corresponding cutting element support structure of the two cutting element support structures, each of the two cutting elements comprising:
- a cutting face;
- a cutting edge adjacent to the cutting face;
- a trailing surface spaced away from the cutting face, the trailing surface being fixed to the mounting surface of the corresponding cutting element support structure;
- wherein:
- the bit body comprises 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;
- a fluid port is defined within each of the two cutting element support structures, each of the fluid ports extending from the internal passage to a port opening that is disposed nearer to the trailing surface of one of the cutting elements than to the cutting face of the other of the cutting elements.
Dependencies are inferred from the claim text.