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:
Nov. 13, 1984
Filed:
Aug. 04, 1983
Walter R Wagner, Minneapolis, MN (US);
Leslie K Bearl, Anoka, MN (US);
UOP Inc., Des Plaines, IL (US);
Abstract
Improved packer assembly for sealing a well screen to a casing avoids contamination problems of expandable lead packers and the abrasion of self-sealing packers which can be rendered ineffective before they reach their intended depth. A pair of annular end members, adapted to be threaded to the well screen and to the drill stem, are joined by a compressible, tubular metal portion. When the well screen is at its intended depth, a swedge dropped against the upper end member of the packer assembly will compress the ends of the tubular metal portion toward each other while the intermediate portion expands into sealing relation with the casing. The seal can be enhanced by applying rings or layers of elastomeric material to the tubular metal portion.