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:
Jul. 16, 2019
Filed:
Feb. 06, 2014
Applicant:
Liyuan Yang, Beijing, CN;
Inventor:
Liyuan Yang, Beijing, CN;
Assignee:
Chengdu Weiyi Petroleum Technology Co., Ltd., Chengdu, Sichuan, CN;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B 10/14 (2006.01); E21B 10/42 (2006.01); E21B 10/43 (2006.01); E21B 10/10 (2006.01); E21B 10/50 (2006.01); E21B 10/54 (2006.01); E21B 10/46 (2006.01); E21B 10/52 (2006.01); E21B 10/55 (2006.01);
U.S. Cl.
CPC ...
E21B 10/14 (2013.01); E21B 10/10 (2013.01); E21B 10/42 (2013.01); E21B 10/43 (2013.01); E21B 10/46 (2013.01); E21B 10/50 (2013.01); E21B 10/52 (2013.01); E21B 10/54 (2013.01); E21B 10/55 (2013.01); E21B 2010/425 (2013.01);
Abstract
A composite drill bit has one or more scraping-wheel cutting units disposed on fixed-blade. The drill bit comprises a bit body, fixed-blades, and scraping-wheels. The angular deflection of the scraping-wheel is in the range of 20°≤|α|≤90°. The scraping-wheel cutting unit has a scraping-wheel shaft and a scraping-wheel with cutters disposed thereon. The scraping-wheel cutting unit is disposed on the fixed-blade by a rotary connection.