US 12,168,281 B2
Polycrystalline diamond compact cutting elements, methods of forming same and earth-boring tools
Jair Leal, Spring, TX (US); John A. Bomidi, Spring, TX (US); and Aaron Gunn, Tomball, TX (US)
Assigned to Baker Hughes Oilfield Operations LLC, Houston, TX (US)
Filed by Baker Hughes Oilfield Operations LLC, Houston, TX (US)
Filed on Jan. 11, 2022, as Appl. No. 17/647,686.
Prior Publication US 2023/0219185 A1, Jul. 13, 2023
Int. Cl. B24B 9/16 (2006.01); B24B 3/33 (2006.01); B24B 55/06 (2006.01)
CPC B24B 9/164 (2013.01) [B24B 3/33 (2013.01); B24B 55/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of forming a cutting element, the method comprising:
leaching at least a portion of a diamond table of the cutting element; and
subsequent to leaching the diamond table of the cutting element, forming a chamfer on a leached portion of the diamond table of the cutting element proximate an interface between a cutting surface of the diamond table and an outer side surface of the diamond table by:
polishing the diamond table of the cutting element until at least a portion of the diamond table graphitizes; and
removing graphite from the diamond table by subjecting at least a portion of the diamond table to airflow.