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. 15, 2016
Filed:
Dec. 20, 2013
National Oilwell Varco, L.p., Houston, TX (US);
NATIONAL OILWELL VARCO, L.P., Houston, TX (US);
Abstract
A coring extender for a coring tool is provided. The coring tool is deployable by a downhole tool into a wellbore. The coring extender includes a housing operatively connectable to the downhole tool, a mandrel, and seals. The housing has fluid chambers therein. The mandrel is positionable in the housing, and includes a locking tube operatively connectable to the housing and a coupling tube operatively connectable to the coring tool. The coupling tube is adjustably positionable relative to the locking tube such that a length of the mandrel is adjustably defined therebetween. The coupling tube has an outer surface slidably positionable along an inner surface of the housing. Seals are positionable between the mandrel and the housing to define a fluid pocket to isolate the fluid therebetween as the coupling tube moves along the housing whereby the fluid permitted to flow about the fluid pocket to balance between the fluid chambers.