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. 27, 2018
Filed:
Nov. 27, 2014
Applicant:
Nov Downhole Eurasia Limited, Gloucestershire, GB;
Inventor:
Mark Adam, Aberdeen, GB;
Assignee:
NOV DOWNHOLE EURASIA LIMITED, Gloucestershire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 10/32 (2006.01); E21B 23/04 (2006.01); E21B 7/28 (2006.01); E21B 17/10 (2006.01); E21B 29/00 (2006.01); E21B 47/12 (2012.01);
U.S. Cl.
CPC ...
E21B 10/322 (2013.01); E21B 7/28 (2013.01); E21B 23/04 (2013.01); E21B 17/1014 (2013.01); E21B 29/002 (2013.01); E21B 47/12 (2013.01);
Abstract
An under-reaming tool comprises a body and a plurality of extendable cutters mounted on the body. The under-reaming tool is configured to be cycled between a first configuration in which the cutters are retracted and a second configuration in which the cutters are movable between retracted and extended positions. The under-reaming tool is configured to prevent extension of the cutters by an external fluid in the first and/or second configuration/s.