Methods of repairing cutting element pockets in earth-boring tools with depth-of-cut control features
View Patent ↗Methods of repairing earth-boring tools may involve providing wear-resistant material over a temporary displacement member to repair a cutting element pocket in a body and a depth-of-cut control feature using the wear-resistant material. In some embodiments, the wear-resistant material may comprise a particle-matrix composite material. For example, a hardfacing material may be built up over a temporary displacement member to form or repair a cutting element pocket and provide a depth-of-cut control feature. Earth-boring tools may include a depth-of-cut control feature comprising a wear-resistant material. The depth-of-cut control feature may be configured to limit a depth-of-cut of a cutting element secured within a cutting element pocket partially defined by at least one surface of the depth-of-cut control feature. Intermediate structures formed during fabrication of earth-boring tools may include a depth-of-cut control feature extending over a temporary displacement member.
1. An earth-boring tool, comprising:
a body; and
a depth-of-cut control feature on a surface of the body, the depth-of-cut control feature comprising a particle-matrix composite material and configured to limit a depth-of-cut of at least one cutting element secured to the body within a pocket, wherein the pocket is partially defined by at least one surface of the body and at least one surface of the depth-of-cut control feature;
a cutting element located within the pocket; and
a bonding material located between the cutting element and the depth-of-cut control feature over at least a substantial surface area of the at least one surface of the depth-of-cut control feature, the bonding material at least partially securing the cutting element within the pocket;
wherein the depth-of-cut control feature extends above the at least one surface of the body and over a portion of the cutting element.
2. The earth-boring tool of claim 1 , wherein the depth-of-cut control feature comprises a deposit of hardfacing material.
3. The earth-boring tool of claim 2 , wherein the deposit of hardfacing material extends a predetermined distance above the surface of the body adjacent the pocket.
4. The earth-boring tool of claim 3 , wherein the deposit of hardfacing material comprises a predetermined minimum surface area at the predetermined distance above the surface of the body adjacent the pocket.
5. The earth-boring tool of claim 1 , wherein the bonding material comprises a braze metal or braze alloy.
6. The earth-boring tool of claim 5 , wherein the braze metal or braze alloy comprises a silver-based brazing alloy.
7. The earth-boring tool of claim 1 , wherein a surface area of the at least one surface of the body partially defining the pocket is less than a surface area of another surface of the body defining another pocket.
8. The earth-boring tool of claim 1 , wherein a surface area of a second surface of the body defining a second pocket is at least substantially equal to the surface area of the at least one surface of the body partially defining the pocket added to a surface area of the at least one surface of the depth-of-cut control feature partially defining the pocket.
9. The earth-boring tool of claim 1 , wherein a maximum thickness of the bonding material is between 0.001 inch and 0.008 inch.
10. The earth-boring tool of claim 1 , wherein a melting point of the bonding material is 1,300° F. or less.
11. The earth-boring tool of claim 1 , wherein an arcuate surface of the depth-of-cut control feature and an arcuate surface of the body are at least substantially coextensive with one another to define an at least substantially cylindrical surface of the pocket.
12. The earth-boring tool of claim 1 , wherein an at least substantially planar surface of the pocket comprises an at least substantially planar surface of the body, an at least substantially planar surface of the depth-of-cut control feature, or both an at least substantially planar surface of the body and an at least substantially planar surface of the depth-of-cut control feature, the at least substantially planar surface of the body and the at least substantially planar surface of the depth-of-cut control feature being coextensive with one another.
13. The earth-boring tool of claim 1 , further comprising a backup cutting element secured to the body in a location at least substantially rotationally following the cutting element.
14. The earth-boring tool of claim 13 , wherein an exposure of the backup cutting element is less than or at least substantially equal to a distance to which the depth-of-cut control feature extends above the body.