The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 2023
Filed:
Dec. 11, 2020
Cnpc Usa Corporation, Houston, TX (US);
Beijing Huamei, Inc., Beijing, CN;
China National Petroleum Corporation, Beijing, CN;
Jiaqing Yu, Houston, TX (US);
Chris X. Cheng, Houston, TX (US);
Jianhua Guo, Beijing, CN;
Bo Zhou, Beijing, CN;
Shijun Qiao, Beijing, CN;
Chuang Zhang, Beijing, CN;
Xu Wang, Beijing, CN;
Chi Ma, Beijing, CN;
Xiongwen Yang, Beijing, CN;
CNPC USA CORPORATION, Houston, TX (US);
BEIJING HUAMEI, INC., Beijing, CN;
CHINA NATIONAL PETROLEUM CORPORATION, Beijing, CN;
Abstract
A drill bit for cutting formation comprises a bit body, a plurality of cutters, a plurality of blades with pockets to accommodate the cutters respectively. Each of the plurality of cutters has an ultra-hard layer, two side facets extending obliquely inward from the substrate to a top surface of the ultra-hard layer, a convex portion between the two side facets. The convex portion comprises a transition surface and the transitional surface is convex as it extends between adjacent the two side facets. The curvature of the transitional surface varies along the cutter axis with the curvature at the cutting edge larger than the curvature of the cutter circumferential surface.