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:
Dec. 05, 2017
Filed:
Apr. 30, 2014
Applicant:
Interwell As, Hafrsfjord, NO;
Inventor:
William Edmund Rolland Brown, Aberdeenshire, GB;
Assignee:
Interwell AS, Hafrsfjord, NO;
Primary Examiner:
Int. Cl.
CPC ...
E21B 23/00 (2006.01); E21B 34/10 (2006.01); E21B 34/08 (2006.01);
U.S. Cl.
CPC ...
E21B 23/004 (2013.01); E21B 23/006 (2013.01); E21B 34/08 (2013.01); E21B 34/10 (2013.01);
Abstract
A method and downhole apparatus including a downhole indexer for cyclically varying a configuration or operational mode of a downhole tool according to a predetermined sequence. The apparatus includes tubular body, an indexing member, and a balance piston. The indexing member is selectively moveable relative to the tubular body between a first axial position and a second axial position in response to a signal. The balance piston supports the indexing member at the second position.