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. 28, 2015
Filed:
Nov. 29, 2011
Applicants:
Carsten Hohl, Hannover, DE;
Harald Grimmer, Niedersachsen, DE;
Volker Krueger, Celle, DE;
Inventors:
Assignee:
Baker Hughes Incorporated, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 4/02 (2006.01); F04C 2/107 (2006.01); E21B 43/12 (2006.01); F03C 2/08 (2006.01); F04C 13/00 (2006.01);
U.S. Cl.
CPC ...
F04C 2/1075 (2013.01); E21B 4/02 (2013.01); E21B 43/128 (2013.01); F03C 2/08 (2013.01); F04C 13/008 (2013.01);
Abstract
An apparatus for use downhole is disclosed that in one embodiment may include a rotor having an outer lobed surface disposed in a stator having an inner lobed surface, wherein the inner lobed-surface or the outer-lobed surface includes a sealing material on a first section thereof and a metallic surface on a second section thereof.