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:
Jan. 29, 2008
Filed:
Dec. 08, 2003
Applicant:
Paul David Howlett, Aberdeen, GB;
Inventor:
Paul David Howlett, Aberdeen, GB;
Assignee:
Specialised Petroleum Services Group Ltd., Westhill, Aberdeen, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 33/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A downhole tool for use in a cased or lined well bore (), the tool including a barrier () arranged on an outer surface of the tool. The barrier may be of a resilient material so that it can be deformed on actuation to control the passage of fluid between the tool and the casing or liner. Fluid flow is thus selectively diverted through flow paths () in the tool. Embodiments are described for actuating the barrier by hydraulic means and for filtering the fluid within the flow paths.