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:
Sep. 30, 2003
Filed:
Aug. 16, 2001
Applicant:
Inventor:
Egil Sunde, Sandnes, NO;
Assignee:
Den Norske Stats Oljeselskap A.S., Stavanger, NO;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 3/3136 ;
U.S. Cl.
CPC ...
E21B 3/3136 ;
Abstract
Device for annular isolation in oil/gas wells comprising a production tube, the production tube comprises coaxially positioned, cylindrical sleeve ( ) having in one end an at least partially radially directed opening slot ( ), said sleeve including a cylindric sealing crown ( ) coupled in one end to a release mechanism ( ) adapted to push the sealing crown ( ) out through the opening, said sealing crown ( ) in its other end being expandable in the tangential direction.