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 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.
Claims20
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 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 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 coupling projection bonded to the at least one cutting element with a first braze,
- wherein:
- the cutting element and coupling projection are bonded to the bit body with a second braze,
- a liquidus temperature of the first braze exceeds a liquidus temperature of the second braze.
Dependencies are inferred from the claim text.