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:
Jul. 09, 2002
Filed:
Oct. 07, 1999
Kent E. Cordry, Clayton, CA (US);
Other;
Abstract
A universal well screen filter assembly for installation in a borehole formed in a fluid bearing formation to filter fluid passing therethrough. The screen filter includes an outer cylindrical perforated screen member and an inner cylindrical perforated screen member which is aligned concentrically with the outer screen member. The inner screen member has a smaller diameter than the outer screen member and positioned to define an annular filter space therebetween. This space is substantially filled with a filter medium which is designed to filter particulate materials from fluid passing through the medium. An upper end cap is secured to an upper end of each of the spaced apart screen members to seal the annular space therebetween and a lower end cap is secured to a lower end of each of the spaced apart screen members to also seal the annular space therebetween. A tubular member is aligned concentrically and extends through the screen filter. The tubular member is adapted for passage of fluid and includes perforations to allow fluid to pass through the screen filter and into the tubular member. The screen filter is also adapted for slidable removal and replacement over the tubular member.