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. 30, 2017
Filed:
Aug. 14, 2013
Applicant:
Canrig Drilling Technology Ltd., Houston, TX (US);
Inventors:
Darcy Stephen Nott, The Woodlands, TX (US);
Mark Blankenship, Tomball, TX (US);
Assignee:
Canrig Drilling Technology Ltd., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 21/08 (2006.01); E21B 21/10 (2006.01);
U.S. Cl.
CPC ...
E21B 21/08 (2013.01); E21B 21/106 (2013.01);
Abstract
Apparatus, systems, and methods for continuously circulating drilling fluid through a tubular string are described. The methods include connecting a sub having a central bore and a side bore to the tubular string, connecting a top drive to the tubular string, connecting a manifold to the sub and top drive, wherein the manifold comprises a plurality of electrically controlled valves, and controlling the flow of drilling fluid through the sub and top drive by selectively opening and closing the electrically controlled valves.