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:
Sep. 13, 2016
Filed:
Aug. 29, 2013
Applicant:
National Oilwell Dht, L.p., Houston, TX (US);
Inventor:
Joseph R DiSantis, Houston, TX (US);
Assignee:
NATIONAL OILWELL DHT, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 10/56 (2006.01); E21B 7/00 (2006.01); E21B 10/55 (2006.01); E21B 10/567 (2006.01);
U.S. Cl.
CPC ...
E21B 10/56 (2013.01); E21B 7/00 (2013.01); E21B 10/55 (2013.01); E21B 10/5673 (2013.01);
Abstract
A cutting insert for a rock drill bit having a ridge formed on a cutting face that splits extrudate formed during drilling thereby reducing the mechanical specific energy that may be expended to move the extrudate across the cutting face. The cutting insert may have a cutting edge which forms the extrudate during drilling and a face having two opposing, generally symmetrical, concave regions that define an elongated ridge therebetween. The ridge may extend across a substantial portion of the face.