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:
Mar. 17, 1987
Filed:
Sep. 17, 1985
Applicant:
Inventor:
Norman W Read, Dallas, TX (US);
Assignee:
Dresser Industries, Inc., Dallas, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166115 ; 166181 ; 166242 ;
Abstract
Apparatus for treating an isolated zone of a well bore includes primary and secondary tubing strings extending from the surface of the well releasably connected to a packer that has been set therein. The primary tubing string extends through the packer whereby the well can be produced or chemical can be injected to treat the isolated zone. The secondary string is of substantially smaller size and is arranged so that it is isolated from the primary tubing string which extends through the releasable connection and through the packer whereby inhibitors, diluents, and the like can be injected in the zone to be treated.