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. 07, 2010
Filed:
May. 22, 2007
Applicant:
Giancarlo Pietro Tomasso Pia, Aberdeen, GB;
Inventor:
Giancarlo Pietro Tomasso Pia, Aberdeen, GB;
Assignee:
Renovus Limited, Aberdeen, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 34/10 (2006.01); F16K 1/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
A downhole valve comprises a body defining a through bore and a valve member for location in the body and movable between an open position and a closed position. The valve has a first configuration in which the valve member is normally closed, and will hold a pressure differential in a first direction, and a second configuration in which the valve member is closed and will maintain a pressure differential in the first direction and also in an opposite second direction and a third configuration in which the valve member is locked in the open position until it is deliberately closed.