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:
Jan. 10, 2017
Filed:
Apr. 01, 2014
Applicant:
National Oilwell Varco, L.p., Houston, TX (US);
Inventors:
Assignee:
National Oilwell Varco, L.P., Houston, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B 25/10 (2006.01); E21B 25/00 (2006.01);
U.S. Cl.
CPC ...
E21B 25/00 (2013.01); E21B 25/10 (2013.01);
Abstract
A coring assembly comprises an outer barrel coupled to a coring bit. An inner barrel is disposed within the outer barrel. An inner sleeve is disposed within the inner barrel and includes at least one frangible region that allows the inner sleeve to break so that coring operations can continue after the occurrence of a core jam.