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. 07, 2015
Filed:
Nov. 05, 2012
Applicant:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Inventor:
Richard T. Caminari, Rosharon, TX (US);
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B 23/04 (2006.01); E21B 23/00 (2006.01); F17D 1/16 (2006.01); E21B 34/10 (2006.01);
U.S. Cl.
CPC ...
E21B 23/006 (2013.01); F17D 1/16 (2013.01); E21B 23/04 (2013.01); E21B 34/10 (2013.01);
Abstract
An actuator that may be used in a wellbore to change the state of a downhole tool. The actuator has an operator that is axially movable in response to changes in tubing pressure. The actuator includes a hydraulic circuit that creates a temporary reference pressure against which the tubing pressure indexes the operator.