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:
Sep. 30, 2009
Applicant:
Ola M. Vestavik, Eggebønes, NO;
Inventor:
Ola M. Vestavik, Eggebønes, NO;
Assignee:
Reelwell AS, , NO;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 17/18 (2006.01); E21B 21/12 (2006.01); E21B 23/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention concerns a unit for a down hole well tool comprising a tool unit comprising at least one first fluid conduit and a return fluid conduit in use forming a well annulus space between the tool unit and the well bore. The tool unit is arranged with at least one piston provided for dividing the well annulus space into at least two well annulus spaces. The communication of fluid between the adjacent well annulus spaces at each side of the piston is controlled by the relative movement between the first fluid conduit and a control element.