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. 31, 2016
Filed:
Aug. 28, 2012
Ram K. Bansal, Houston, TX (US);
Joe Noske, Houston, TX (US);
Miroslav Mihalj, Houston, TX (US);
Bill Menard, Spring, TX (US);
Thomas F. Bailey, Houston, TX (US);
David Pavel, Kingwood, TX (US);
Gerald Wes Don Buchanan, Calgary, CA;
Geoff George, Magnolia, TX (US);
David Vieraitis, The Woodlands, TX (US);
Ram K. Bansal, Houston, TX (US);
Joe Noske, Houston, TX (US);
Miroslav Mihalj, Houston, TX (US);
Bill Menard, Spring, TX (US);
Thomas F. Bailey, Houston, TX (US);
David Pavel, Kingwood, TX (US);
Gerald Wes Don Buchanan, Calgary, CA;
Geoff George, Magnolia, TX (US);
David Vieraitis, The Woodlands, TX (US);
Weatherford Technology Holdings, LLC, Houston, TX (US);
Abstract
A flow sub for use with a drill string includes: a tubular housing having a longitudinal bore formed therethrough and a flow port formed through a wall thereof; a bore valve operable between an open position and a closed position, wherein the bore valve allows free passage through the bore in the open position and isolates an upper portion of the bore from a lower portion of the bore in the closed position; and a sleeve disposed in the housing and movable between an open position where the flow port is exposed to the bore and a closed position where a wall of the sleeve is disposed between the flow port and the bore; and a bore valve actuator operably coupling the sleeve and the bore valve such that opening the sleeve closes the bore valve and closing the sleeve opens the bore valve.