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. 25, 2004
Filed:
Oct. 10, 2001
Michael E. McMahan, Humble, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
A separation barrier for placement in an open well bore or casing, to prevent migration of cement slurry downwardly into the drilling fluid, facilitating the placement of a cement plug to segregate a well bore into uphole and downhole portions. The barrier has an annular seal which facilitates pumping the barrier downhole through a work string to a desired location. The separation barrier also has a plurality of flexible elongated elements which expand outwardly when the barrier exits the work string. The elongated elements are closely spaced to prevent migration or contamination of cement slurry therebetween. The barrier can also have a shearable landing ring for providing positive indication of placement of the barrier at the desired location.