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:
Mar. 13, 2018
Filed:
Nov. 12, 2014
Applicant:
Smith International, Inc., Houston, TX (US);
Inventors:
Manoj D. Mahajan, Houston, TX (US);
Daniel W. Brietzke, Spring, TX (US);
Nathan E. Fuller, Spring, TX (US);
James A. Barnhouse, Houston, TX (US);
Georges Ishak, Houston, TX (US);
Assignee:
SMITH INTERNATIONAL, INC., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 7/28 (2006.01); E21B 3/00 (2006.01); E21B 10/32 (2006.01);
U.S. Cl.
CPC ...
E21B 7/28 (2013.01); E21B 3/00 (2013.01); E21B 10/322 (2013.01);
Abstract
An underreamer for increasing the diameter of a bore. The underreamer includes a substantially cylindrical body. A mandrel may extend axially through the body. One or more cutter blocks are movably coupled to the body. A ratio of a height of the cutter block to a diameter of the body is between about 0.35:1 and about 0.50:1.