US 12,435,576 B2
Multi-cutting-edge diamond composites and earth-boring tools
Qiang Liu, Wuhan (CN); and Guanfu Tu, Wuhan (CN)
Assigned to Kingdream Public Ltd. Co., Wuhan (CN); and Sinopec Oilfield Equipment Corporation, Wuhan (CN)
Appl. No. 18/569,964
Filed by KINGDREAM PUBLIC LIMITED COMPANY, Wuhan (CN); and SINOPEC OILFIELD EQUIPMENT CORPORATION, Wuhan (CN)
PCT Filed Mar. 3, 2023, PCT No. PCT/CN2023/079500
§ 371(c)(1), (2) Date Dec. 13, 2023,
PCT Pub. No. WO2023/165592, PCT Pub. Date Sep. 7, 2023.
Claims priority of application No. 202210218326.6 (CN), filed on Mar. 3, 2022.
Prior Publication US 2025/0092741 A1, Mar. 20, 2025
Int. Cl. E21B 10/567 (2006.01)
CPC E21B 10/567 (2013.01) 13 Claims
OG exemplary drawing
 
1. A multi-cutting-edge diamond composite, comprising a columnar hard alloy substrate and a diamond composite layer, the diamond composite layer being disposed at a top end of the hard alloy substrate, wherein a circumferential edge of a top end of the diamond composite layer is provided with at least two segments of different chamfers to form different cutting edges; and
wherein the entire circumferential edge of the top end of the diamond composite layer is provided with chamfers, and for every two segments of different chamfers, the greater the radial width of the chamfer, the smaller an included angle between a bevel face of the chamfer and the radial plane of the diamond composite layer.