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:
Dec. 17, 2019
Filed:
Dec. 11, 2017
Varel International Ind., L.p., Carrollton, TX (US);
Daniel Michael Tilleman, Calgary, CA;
VAREL INTERNATIONAL IND., L.P., Carrollton, TX (US);
Abstract
A bit for drilling a wellbore, includes: a bit body; and a cutting face having an inner cone section and an outer shoulder section. The cutting face includes: a plurality of blades protruding from a bottom of the bit body, each blade extending from a center of the cutting face to the shoulder section; and a plurality of shear cutters mounted along leading edges of the blades. An inner shear cutter of each blade is located in the cone section. Each inner shear cutter includes: a superhard cylindrical cutting table; and a hard substrate having a cylindrical portion attached to the cutting table and a reduced portion extending therefrom. A diameter of the cutting table and the cylindrical portion is greater than a diameter of a majority of the reduced portion. A length of the reduced portion is at least twice that of the cylindrical portion.