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. 09, 2013
Filed:
Aug. 12, 2009
Jed Ludlow, Bountiful, UT (US);
Keith Glass, Toronto, CA;
Jonathan Warkentin, Toronto, CA;
Paul Laursen, North York, CA;
Jed Ludlow, Bountiful, UT (US);
Keith Glass, Toronto, CA;
Jonathan Warkentin, Toronto, CA;
Paul Laursen, North York, CA;
TDW Delaware, Inc., Wilmington, DE (US);
Abstract
A system and method for retrieving a pipeline tool from a pipeline includes a speed control drive section that includes a primary bypass flow valve and a failsafe valve located in a central bypass flow passageway of the drive section. The failsafe valve is placed under the control of a controller. The controller is programmed to release the failsafe valve under prescribed failure conditions. An actuating means moves the failsafe valve between a normally opened positioned and a closed position in response to the controller.