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:
Jun. 09, 2009
Filed:
Sep. 19, 2006
Applicants:
Peter Krawiec, Bonnyville, CA;
Dwayne D. Leismer, Basiglio, IT;
Youel G. Hilsman, Friendswood, TX (US);
Inventors:
Peter Krawiec, Bonnyville, CA;
Dwayne D. Leismer, Basiglio, IT;
Youel G. Hilsman, Friendswood, TX (US);
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 33/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A subsurface annular safety barrier for controlling fluid flow in the tubing-casing annulus in an annular flow well. The barrier may be positioned proximate the top of a formation to block fluid flow through the annulus upon loss of casing integrity. An embodiment of the annular safety barrier includes a packer and a valve, wherein the valve is operated to a closed position without mechanical manipulation of the tubing.