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. 15, 2013
Filed:
Jul. 29, 2011
Jason C. Mailand, The Woodlands, TX (US);
Justin C. Kellner, Pearland, TX (US);
Charles C. Jonhson, League City, TX (US);
Charles T. Kirkpatrick, New Caney, TX (US);
Marcus A. Avant, Kingwood, TX (US);
Jason C. Mailand, The Woodlands, TX (US);
Justin C. Kellner, Pearland, TX (US);
Charles C. Jonhson, League City, TX (US);
Charles T. Kirkpatrick, New Caney, TX (US);
Marcus A. Avant, Kingwood, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
A tubing pressure operated sliding sleeve is used in cementing a tubular string. The sleeve is configured to hold closed as pressure builds to a predetermined value. When pressure is further raised a rupture disc blows and provides access to an integral piston disposed outside the sleeve. The back side of the piston is exposed to a low pressure or atmospheric chamber located between upper and lower seals. The sleeve thickness near the chamber can be made relatively thick to avoid flexing or bending under differential pressure because the net force to shift the sleeve is from differential pressure on the piston rather than the piston areas created by the upper and lower seals.