Rotational drill bits and drilling apparatuses including the same
View Patent ↗A subterranean support-bolt drill bit includes a bit body rotatable about a central axis and at least one cutting element mounted to the bit body. The at least one cutting element has a cutting face, a cutting edge adjacent the cutting face, and a back surface opposite the cutting face. A first recess is defined in the bit body and positioned adjacent the at least one cutting element. A first opening extends through a portion of the bit body, the first opening extending from the first recess. A coupling projection extends from the back surface of the at least one cutting element, the coupling projection being positioned within the first recess. A coupling attachment extends through the first opening and is attached to the coupling projection.
1. A subterranean support-bolt drill bit, comprising:
a bit body rotatable about a central axis;
at least one cutting element mounted to the bit body, the at least one cutting element comprising:
a cutting face;
a cutting edge adjacent the cutting face;
a back surface opposite the cutting face;
a first recess defined in the bit body and positioned adjacent the at least one cutting element;
a first opening extending through a portion of the bit body, the first opening extending from the first recess;
a coupling projection extending from the back surface of the at least one cutting element, the coupling projection being positioned within the first recess;
a coupling attachment extending through the first opening and attached to the coupling projection;
a locking member disposed adjacent the at least one cutting element,
wherein the coupling attachment extends through a second opening extending through a portion of the coupling projection and the coupling attachment extends into a second recess defined in the locking member.
2. The subterranean support-bolt drill bit of claim 1 , wherein the coupling projection extends from the back surface of the at least one cutting element in a direction perpendicular to the back surface.
3. The subterranean support-bolt drill bit of claim 1 , wherein the first opening extends from the first recess to a portion of the bit body spaced apart from the first recess.
4. The subterranean support-bolt drill bit of claim 1 , wherein the coupling attachment extends into a second recess defined in the coupling projection.
5. The subterranean support-bolt drill bit of claim 1 , wherein coupling attachment comprises a threaded exterior portion.
6. The subterranean support-bolt drill bit of claim 1 , wherein a portion of the coupling projection is disposed between the locking member and the bit body.
7. The subterranean support-bolt drill bit of claim 1 , wherein:
a concave portion is defined in a periphery of the coupling projection,
a portion of the coupling attachment is disposed in the concave portion.
8. The subterranean support-bolt drill bit of claim 1 , wherein the at least one cutting element comprises a superabrasive material.
9. The subterranean support-bolt drill bit of claim 1 , wherein the superabrasive material comprises polycrystalline diamond.
10. A subterranean support-bolt drill bit, comprising:
a bit body rotatable about a central axis;
at least one cutting element mounted to the bit body, the at least one cutting element comprising:
a cutting face;
a cutting edge adjacent the cutting face;
a back surface opposite the cutting face;
a first recess defined in the bit body and positioned adjacent the at least one cutting element;
a second recess defined in the bit body;
a coupling projection extending from the back surface of the at least one cutting element, the coupling projection being positioned within the first recess;
a coupling attachment comprising at least a portion disposed within the second recess;
a locking member disposed adjacent the at least one cutting element,
wherein the coupling attachment extends through a second opening extending through a portion of the coupling projection and the coupling attachment extends through at least a portion of the locking member.
11. The subterranean support-bolt drill bit of claim 10 , wherein the second recess is located adjacent the first recess.
12. The subterranean support-bolt drill bit of claim 10 , wherein a portion of the coupling projection is disposed between the locking member and the bit body.