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:
Oct. 23, 2018
Filed:
May. 10, 2016
Weatherford Technology Holdings, Llc, Houston, 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, Abilene, 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 method for drilling a wellbore includes disposing a tubular string in the wellbore, wherein the tubular string includes a drill bit disposed at a bottom and a flow sub disposed on a top; injecting drilling fluid through a bore valve in the flow sub to rotate the drill bit; moving a sleeve in the flow sub to engage and close the bore valve; moving the sleeve independently from the bore valve to expose a flow port formed through a wall of the flow sub; and injecting the drilling fluid into the flow port while adding a stand to the top of the tubular string, wherein injection of drilling fluid into the tubular string is continuously maintained between drilling and adding the stand to the tubular string.