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. 17, 2015
Filed:
Oct. 20, 2005
Frederick T. Tilton, Spring, TX (US);
David M. Haugen, League City, TX (US);
Kevin W. Smith, Houston, TX (US);
David J. Brunnert, Cypress, TX (US);
Thomas F. Bailey, Houston, TX (US);
Tom Fuller, Aberdeenshire, GB;
Roy W. Rooyakkers, Tananger, NO;
Ram K. Bansal, Houston, TX (US);
Graham Skinner, Aberdeenshire, GB;
Frederick T. Tilton, Spring, TX (US);
David M. Haugen, League City, TX (US);
Kevin W. Smith, Houston, TX (US);
David J. Brunnert, Cypress, TX (US);
Thomas F. Bailey, Houston, TX (US);
Tom Fuller, Aberdeenshire, GB;
Roy W. Rooyakkers, Tananger, NO;
Ram K. Bansal, Houston, TX (US);
Graham Skinner, Aberdeenshire, GB;
Weatherford/Lamb, Inc., Houston, TX (US);
Abstract
Embodiments of the present invention include methods and apparatus for dynamically controlling pressure within a wellbore while forming the wellbore. In one aspect, one or more pressure control apparatus are used to maintain desired pressure within the wellbore while drilling the wellbore. In another aspect, pressure is dynamically controlled while drilling using foam to maintain a substantially homogenous foam flow regime within the wellbore annulus for carrying cuttings from the wellbore.