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:
Nov. 12, 2019
Filed:
Nov. 18, 2015
Applicant:
Esco Corporation, Portland, OR (US);
Inventors:
Calvin William Collins, West Linn, OR (US);
Jon V. Owen, West Linn, OR (US);
Alfred H. Skinner, Aledo, TX (US);
Neal Alan Bowden, Mansfield, TX (US);
Ryan J. Nelson, Portland, OR (US);
Assignee:
ESCO GROUP LLC, Portland, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 10/42 (2006.01); B22D 19/06 (2006.01);
U.S. Cl.
CPC ...
E21B 10/42 (2013.01); B22D 19/06 (2013.01);
Abstract
Producing a drag bit includes creating a mold corresponding to the surface of the bit and inserting a core in the mold corresponding to the plenum of the bit. A preliminary shaped bit is cast in the mold. Excess material is removed from the casting to produce a final shaped bit.