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:
Feb. 28, 2012
Filed:
Nov. 18, 2010
Gary Belcher, Calgary, CA;
Adrian Steiner, Calgary, CA;
Kevin Schmigel, Calgary, CA;
David Brunnert, Cypress, TX (US);
Darcy Nott, Calgary, CA;
Richard Todd, Houston, TX (US);
Jim Stanley, Katy, TX (US);
Simon Harrall, Houston, TX (US);
Gary Belcher, Calgary, CA;
Adrian Steiner, Calgary, CA;
Kevin Schmigel, Calgary, CA;
David Brunnert, Cypress, TX (US);
Darcy Nott, Calgary, CA;
Richard Todd, Houston, TX (US);
Jim Stanley, Katy, TX (US);
Simon Harrall, Houston, TX (US);
Weatherford/Lamb, Inc., Houston, TX (US);
Abstract
In one embodiment, a method for drilling a wellbore includes an act of drilling the wellbore by injecting drilling fluid through a tubular string disposed in the wellbore, the tubular string comprising a drill bit disposed on a bottom thereof. The drilling fluid exits the drill bit and carries cuttings from the drill bit. The drilling fluid and cuttings (returns) flow to a surface of the wellbore via an annulus defined by an outer surface of the tubular string and an inner surface of the wellbore. The method further includes an act performed while drilling the wellbore of measuring a first annulus pressure (FAP) using a pressure sensor attached to a casing string hung from a wellhead of the wellbore. The method further includes an act performed while drilling the wellbore of controlling a second annulus pressure (SAP) exerted on a formation exposed to the annulus.