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:
May. 10, 2016
Filed:
Apr. 04, 2012
Andrew James Hanson, Edmonton, CA;
Jozeph Robert Marcin, Spruce Grove, CA;
Randal Brent Biedemann, Calgary, CA;
Damian Leonard Ward, Calgary, CA;
Clayton R. Andersen, Houston, TX (US);
Andrew James Hanson, Edmonton, CA;
Jozeph Robert Marcin, Spruce Grove, CA;
Randal Brent Biedemann, Calgary, CA;
Damian Leonard Ward, Calgary, CA;
Clayton R. Andersen, Houston, TX (US);
WEATHERFORD TECHNOLOGY HOLDINGS, LLC, Houston, TX (US);
Abstract
A method and apparatus for conducting a reverse flow operation. The apparatus may be lowered into a wellbore on a work string, and includes an opening device, a closing device, and a locking device disposed in a housing. Pressurized fluid supplied through the work string may actuate the opening device to open fluid flow through ports in the housing. Pressurized fluid from the annulus may be supplied through the port in the reverse flow direction to actuate the locking device to enable fluid flow up through the work string back to the surface, and to release the closing device. Pressurized fluid supplied through the work string may actuate the closing device to close fluid flow through the ports in the housing.