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:
Aug. 04, 2015
Filed:
Aug. 14, 2009
Daniel Guy Pomerleau, Calgary, CA;
Keith Kenneth Corb, Calgary, CA;
Stuart Dwight Butler, Calgary, CA;
Robert T. Staysko, Calgary, CA;
Gregg Mackay Jollymore, Cochrane, CA;
Daniel Guy Pomerleau, Calgary, CA;
Keith Kenneth Corb, Calgary, CA;
Stuart Dwight Butler, Calgary, CA;
Robert T. Staysko, Calgary, CA;
Gregg MacKay Jollymore, Cochrane, CA;
LUBRIZOL OILFIELD SOLUTIONS, INC., Wickliffe, OH (US);
Abstract
In one embodiment, a method for drilling a wellbore includes injecting drilling fluid through a drill string disposed in the wellbore and rotating a drill bit disposed on a bottom of the drill string. The drilling fluid includes a liquid and a gas. The drilling fluid is injected at the surface. The drilling fluid exits the drill bit and carries cuttings from the drill bit. The drilling fluid and cuttings (returns) flow to the surface via an annulus formed between the drill string and the wellbore. The liquid is injected at a rate so that a liquid velocity of the returns in the annulus is sufficient to transport the cuttings. The method further includes drilling through at least a portion of a non-productive formation.